WEBVTT 00:00:00.800 --> 00:00:03.080 They say an Englishman's home is his castle, 00:00:03.120 --> 00:00:05.560 and this is mine. 00:00:05.600 --> 00:00:09.720 Some say it's a bit on the big side for one person, but... 00:00:09.760 --> 00:00:12.120 ..well, it's somewhere to lay my head. 00:00:12.160 --> 00:00:15.640 Yes, I'm just a regular guy living in a standard gaff, leading 00:00:15.680 --> 00:00:18.920 an ordinary existence and struggling to answer all of 00:00:18.960 --> 00:00:20.480 life's big questions. 00:00:20.520 --> 00:00:24.560 Like, why can't I feed the dog while relaxing in the garden? 00:00:24.600 --> 00:00:27.680 Is it possible for me to boil the kettle while I perform 00:00:27.720 --> 00:00:29.600 my morning ablutions? 00:00:29.640 --> 00:00:33.680 And why can't I make my bed while relaxing in the bath? 00:00:33.720 --> 00:00:37.720 I'm sure there are neat but dreary digital solutions available, 00:00:37.760 --> 00:00:39.760 but who wants to do this... 00:00:40.960 --> 00:00:42.480 ..when you can do this? 00:00:48.600 --> 00:00:50.480 It's just better. 00:00:50.520 --> 00:00:54.760 Now it's the second semifinal of my knockout tournament... 00:00:54.800 --> 00:00:56.600 This already feels dangerous. 00:00:56.640 --> 00:00:59.680 ..where teams of amateur engineers... Ooh! 00:00:59.720 --> 00:01:02.880 ..will compete to perform my ordinary chores 00:01:02.920 --> 00:01:04.600 in extraordinary ways... 00:01:04.640 --> 00:01:06.720 Love it when a plan comes together. 00:01:06.760 --> 00:01:09.440 ..with chain reaction machines, 00:01:09.480 --> 00:01:13.040 crazy contraptions made famous by viral videos 00:01:13.080 --> 00:01:17.440 that involve linking up everyday objects to magical effect. 00:01:21.200 --> 00:01:25.040 Chain reaction guru Zach Umperovitch is the fearsome judge. 00:01:25.080 --> 00:01:27.680 That better work perfectly the first time. 00:01:27.720 --> 00:01:29.240 Oh, you stupid thing! 00:01:30.840 --> 00:01:34.840 Dr Shini Somara will reveal the science inside the machines. 00:01:36.760 --> 00:01:39.640 And at the end of it all, one team will be crowned 00:01:39.680 --> 00:01:41.440 chain reaction champions. 00:01:50.160 --> 00:01:54.120 So I cranked it by hand 00:01:54.160 --> 00:01:56.680 and drove on. 00:01:58.440 --> 00:02:02.000 Writing my blockbusting memoirs always makes me hungry. 00:02:02.040 --> 00:02:05.480 But a trip to the kitchen would disrupt my creative flow 00:02:05.520 --> 00:02:08.000 and disappoint readers across the globe. 00:02:08.040 --> 00:02:11.600 So can a machine help me cook my favourite food 00:02:11.640 --> 00:02:14.840 while I maintain my creative flow? 00:02:14.880 --> 00:02:17.280 Because I really do love sausages. 00:02:20.640 --> 00:02:25.680 My sausage-sizzling solution lies in the hands of my semifinalists. 00:02:25.720 --> 00:02:27.640 There's always time for a cup of tea. 00:02:27.680 --> 00:02:29.680 The Aviators are plucky amateur pilots. 00:02:29.720 --> 00:02:32.200 Well, we're always feeling confident. Doesn't mean we'll 00:02:32.240 --> 00:02:33.800 succeed, but we're feeling good. 00:02:33.840 --> 00:02:37.720 And Social Mediocrity are superstars on something called TikTok. 00:02:37.760 --> 00:02:40.040 Test it, test it, test it. Ooh, that's a new one. 00:02:40.080 --> 00:02:43.480 The victor will face the winner of the first semi, the brilliant 00:02:43.520 --> 00:02:45.880 Fieldhouse Brothers, in the final. 00:02:46.920 --> 00:02:48.840 Yeah, come on! 00:02:48.880 --> 00:02:51.920 Getting to the final would be a little bit mind-blowing, but I sort 00:02:51.960 --> 00:02:53.920 of think it's possible all of a sudden now. 00:02:53.960 --> 00:02:57.560 As ever, the battle will take place in one of my many outbuildings. 00:02:57.600 --> 00:03:01.160 I may be eccentric, but I'm not completely mad. 00:03:01.200 --> 00:03:02.840 I'm not letting them in here. 00:03:02.880 --> 00:03:06.600 Instead, each team has a workshop packed with objects to use 00:03:06.640 --> 00:03:08.120 in their contraptions... 00:03:08.160 --> 00:03:09.680 Back again, Huh? Here we are again. 00:03:09.720 --> 00:03:12.480 We are hoping to keep our workshop a little bit cleaner this time. 00:03:12.520 --> 00:03:15.400 ..and three days to create machines that start in my study, 00:03:15.440 --> 00:03:18.440 cross the hallway and finish when sausages hit pan in the kitchen. 00:03:18.480 --> 00:03:21.040 There's the obligatory aircraft. We've got to have that. 00:03:21.080 --> 00:03:23.360 People say, "What's on your hand?" And I just go, like 00:03:23.400 --> 00:03:24.600 everything's hopeless. 00:03:24.640 --> 00:03:26.920 And then it just drops into, "I'm a hopeless romantic." 00:03:26.960 --> 00:03:29.720 I didn't think I could love you any more, you're so sweet. 00:03:29.760 --> 00:03:32.480 We've all got a rough idea what we want to do, but we just need to make 00:03:32.520 --> 00:03:34.800 sure we can marry it up in the middle. 00:03:34.840 --> 00:03:37.560 I'm going to be far too busy to even notice there is another team 00:03:37.600 --> 00:03:41.000 because that's what happened last time. He's not wrong! 00:03:41.040 --> 00:03:42.680 I literally nearly drowned! 00:03:42.720 --> 00:03:45.320 Online mates Social Mediocrity, better known 00:03:45.360 --> 00:03:47.760 for producing viral TikTok videos... 00:03:47.800 --> 00:03:49.280 Take me up The Shard. 00:03:49.320 --> 00:03:52.440 ..met for the first time just before the competition. 00:03:52.480 --> 00:03:55.280 We've only been in the same room about twice, 00:03:55.320 --> 00:03:56.640 but we're really good mates. 00:03:56.680 --> 00:03:59.960 They had a steep learning curve in their nail-biting heat... Ooh! 00:04:00.000 --> 00:04:01.520 Hey! 00:04:01.560 --> 00:04:04.040 ..when they repeatedly ran out of time to test 00:04:04.080 --> 00:04:06.520 their complex, funny build. 00:04:06.560 --> 00:04:08.960 They've not left themselves enough time, yet again. 00:04:09.000 --> 00:04:12.440 But they still snatched victory from Team Civilised with a flawless 00:04:12.480 --> 00:04:15.040 run of their kettle-boiling contraption. 00:04:15.080 --> 00:04:16.520 Oh, my word! 00:04:16.560 --> 00:04:18.360 Ha-ha! 00:04:18.400 --> 00:04:21.040 We've learned we can't cope with the stress of running a machine 00:04:21.080 --> 00:04:22.560 first time, having never tested it. 00:04:22.600 --> 00:04:24.560 So that won't be happening again. 00:04:26.080 --> 00:04:28.244 Social Mediocrity. Hello. Hello. 00:04:28.268 --> 00:04:29.520 Welcome back. Thank you. 00:04:29.560 --> 00:04:33.080 In the heats, time occasionally got away from you and you were getting 00:04:33.120 --> 00:04:34.677 quite wound up. You remember that, 00:04:34.701 --> 00:04:35.720 do you? Great for me. I love it. 00:04:35.760 --> 00:04:39.200 Yeah. But for your sakes, have you thought of a way around that? 00:04:39.240 --> 00:04:43.080 The word "testing" has been uttered by Mike a million times 00:04:43.120 --> 00:04:44.440 since we were here before. 00:04:44.480 --> 00:04:46.960 Yeah, it used to be a word, along with "measuring", 00:04:47.000 --> 00:04:48.720 that I didn't like. 00:04:48.760 --> 00:04:51.800 Well, they have something in common with The Aviators, then. 00:04:54.200 --> 00:04:55.520 It's finished! 00:04:56.760 --> 00:04:58.240 It's nearly time for a cup of tea. 00:04:58.280 --> 00:05:02.040 These plucky problem-solvers aren't fazed by anything. 00:05:02.080 --> 00:05:03.080 Right, we're in. 00:05:03.120 --> 00:05:06.120 I made my own robotic cutting machine, and then I designed 00:05:06.160 --> 00:05:08.920 and made a prosthetic arm so I could take flight training. 00:05:08.960 --> 00:05:12.120 When I'm flying an aircraft, I'm no different to an able-bodied person. 00:05:12.160 --> 00:05:15.240 They took charge of a room each in their heat to produce 00:05:15.280 --> 00:05:19.160 a brilliantly chaotic aviation-themed dog-feeding machine. 00:05:19.200 --> 00:05:20.840 Little bit more dramatic. 00:05:23.560 --> 00:05:25.080 Hey-hey-hey! 00:05:25.120 --> 00:05:28.040 But their unflappable nature could be their downfall... 00:05:28.080 --> 00:05:29.680 Love it when a plan comes together. 00:05:29.720 --> 00:05:32.440 ..because they often avoid the stress of actually testing 00:05:32.480 --> 00:05:36.000 their contraption and choose to have a cuppa instead. 00:05:36.040 --> 00:05:38.240 We've got a different approach this time, so we'll see 00:05:38.280 --> 00:05:41.840 if it improves our game or not. 00:05:41.880 --> 00:05:43.800 Morning, Aviators. Good morning. 00:05:43.840 --> 00:05:45.760 Well, most of them. We've got Steve and Al, 00:05:45.800 --> 00:05:47.718 but Paul's in the workshop, I 00:05:47.742 --> 00:05:48.720 presume... Yeah. ..making stuff. 00:05:48.760 --> 00:05:51.000 You've already started. That much is apparent. 00:05:51.040 --> 00:05:53.480 Yeah, well, we decided to approach it from a different angle. 00:05:53.520 --> 00:05:56.560 This time, instead of taking control of a room like we did before, 00:05:56.600 --> 00:05:59.240 although it was successful, we decided that stifled our 00:05:59.280 --> 00:06:00.400 creativity a little bit. 00:06:00.440 --> 00:06:02.200 So we're going to just go for it. 00:06:02.240 --> 00:06:05.320 Al, but you're starting it on the typewriter. How? 00:06:05.360 --> 00:06:08.400 I'm starting on the typewriter to initiate an electric match, 00:06:08.440 --> 00:06:10.040 which is going to pop a balloon. 00:06:10.080 --> 00:06:12.880 So it's just a case of tabbing along, hitting this strike button... 00:06:12.920 --> 00:06:15.480 Oh! Boom. It worked! Look at that, it works! 00:06:15.520 --> 00:06:18.120 After the typewriter detonates a balloon, 00:06:18.160 --> 00:06:21.320 they want a weight to switch on a leaf blower, which floats 00:06:21.360 --> 00:06:25.320 a brolly to pop another balloon, releasing a plane on a zip wire 00:06:25.360 --> 00:06:27.600 to burst a third balloon that drops 00:06:27.640 --> 00:06:29.600 a boot and sends a bowling ball 00:06:29.640 --> 00:06:31.000 down a ramp. 00:06:31.040 --> 00:06:34.760 From there, the Aviators are winging it. 00:06:34.800 --> 00:06:37.440 Can I have a test run, Albert? You can, mate, yeah. 00:06:37.480 --> 00:06:40.640 This competition sometimes does funny things to people. 00:06:40.680 --> 00:06:42.280 Just hit the switch, yeah? Yeah. 00:06:42.320 --> 00:06:44.920 Paul, for example, once rebuilt and frequently 00:06:44.960 --> 00:06:47.360 flies his own microlight aircraft. 00:06:49.160 --> 00:06:51.920 And now... Oh, it never went high enough. 00:06:51.960 --> 00:06:54.080 I might go see if there's a slightly better one. 00:06:54.120 --> 00:06:56.360 ..he's testing the air-worthiness of umbrellas. 00:06:56.400 --> 00:06:59.040 That one feels a little bit stronger. 00:07:00.600 --> 00:07:02.828 Meanwhile, toy fan Josh, who used 00:07:02.852 --> 00:07:05.080 a puzzle cube in a practice machine 00:07:05.120 --> 00:07:09.200 he made with Mike and Baz at home and deployed yo-yos in the heats, 00:07:09.240 --> 00:07:12.000 is playing to his strengths with a new friend. 00:07:12.040 --> 00:07:14.520 That was a good one. He's called Tony for several reasons. 00:07:14.560 --> 00:07:17.040 Firstly, because the shape he makes is a T, you know, 00:07:17.080 --> 00:07:18.200 if you were to stop him. 00:07:18.240 --> 00:07:20.640 Second of all, he features in Iron Man 2. 00:07:20.680 --> 00:07:23.480 And third of all, everyone thinks I look like Robert Downey Jr. 00:07:23.520 --> 00:07:26.600 So, Robert... Sorry, Josh, is there a plan? 00:07:26.640 --> 00:07:29.120 We know our first trigger we want to be a typewriter, 00:07:29.160 --> 00:07:30.560 so we can write some memoirs. 00:07:30.600 --> 00:07:34.640 And we use Tony here to release this globe down a slope. 00:07:34.680 --> 00:07:37.160 And then, ideally, something falls off and pushes a sail 00:07:37.200 --> 00:07:39.000 over into our next room. 00:07:39.040 --> 00:07:42.800 Iron Man's stunt double is hoping a typewriter releases Tony, 00:07:42.840 --> 00:07:45.280 who rolls a globe that knocks a plant pot, 00:07:45.320 --> 00:07:48.720 triggering a truck to strike matches that burn a string, 00:07:48.760 --> 00:07:50.960 dropping a weight that turns on a fan 00:07:51.000 --> 00:07:53.840 that blows a sail into the next room. 00:07:53.880 --> 00:07:55.040 OK! 00:07:55.080 --> 00:07:57.560 The girls in the previous round wanted to do a car that lit 00:07:57.600 --> 00:08:00.400 something, and we promised them that we would incorporate 00:08:00.440 --> 00:08:02.880 it into our build for the semifinal. 00:08:02.920 --> 00:08:06.160 This cute tribute to his former opponents won't sway 00:08:06.200 --> 00:08:08.160 cold-hearted Zach. 00:08:08.200 --> 00:08:11.840 He'll just want to see the fire burn the string reliably. 00:08:11.880 --> 00:08:13.200 So the match is on top of here. 00:08:13.240 --> 00:08:15.520 I'm going to strike and there's going to be a string 00:08:15.560 --> 00:08:16.760 across the top there. 00:08:16.800 --> 00:08:19.480 And when that burns through, then something's going to drop. 00:08:19.520 --> 00:08:20.880 Nice. 00:08:20.920 --> 00:08:23.800 I love a semifinal because it's all to play for, and at the end of this, 00:08:23.840 --> 00:08:25.840 it's not over. So this is exciting. 00:08:25.880 --> 00:08:28.520 How are they going to up their game? 00:08:28.560 --> 00:08:30.228 I think the Aviators are flying 00:08:30.252 --> 00:08:31.920 away with it already. Aviation term. 00:08:31.960 --> 00:08:33.528 I've got so many. That's good. 00:08:33.552 --> 00:08:35.120 Everything is just high in the air. 00:08:35.160 --> 00:08:37.600 It's all fantastic, high-flying stuff. 00:08:37.640 --> 00:08:40.440 Down on my head, mate. Reliability got them last time. 00:08:40.480 --> 00:08:41.760 Yeah, absolutely. 00:08:41.800 --> 00:08:44.560 They need to be testing, making sure all of their elements work, not 00:08:44.600 --> 00:08:48.120 having tea for two hours, because they're upping the complexity of it. 00:08:48.160 --> 00:08:50.560 If we go across to Social Mediocrity, 00:08:50.600 --> 00:08:53.360 their story last time was just running out of time. 00:08:53.400 --> 00:08:56.360 They did, but they did have a perfect run and they might have run 00:08:56.400 --> 00:08:57.680 out of time, but it worked. 00:08:57.720 --> 00:09:00.800 I'm happy to look at this machine, and right now I'm seeing a 00:09:00.840 --> 00:09:04.280 dump truck that has a match on it and that gets lit by a flyswatter. 00:09:04.320 --> 00:09:07.160 I think that's truly a fantastic module. 00:09:09.880 --> 00:09:11.000 Hang on. 00:09:11.040 --> 00:09:15.480 Is that Robert Downey Jr creating a ship's sail to use in an audition 00:09:15.520 --> 00:09:19.360 tape for a role in the next Pirates of the Caribbean movie? 00:09:19.400 --> 00:09:23.200 My space is mostly about this hinge, really. Oh, no, no. It's Josh, 00:09:23.240 --> 00:09:25.320 working on the final stage. 00:09:25.360 --> 00:09:29.160 The idea is the fan turns itself on somehow and then blows this down, 00:09:29.200 --> 00:09:30.600 which will activate room two. 00:09:30.640 --> 00:09:33.640 So that's the exit strategy sorted. Send me success. 00:09:33.680 --> 00:09:35.640 But there are problems at the start. 00:09:35.680 --> 00:09:38.440 The most time-consuming part of the build is Tony over here, 00:09:38.480 --> 00:09:41.200 which Baz is spending way too much longer than he would like. 00:09:41.240 --> 00:09:44.040 I need to get off it soon. But if it works, it's going to be beautiful. 00:09:44.080 --> 00:09:46.520 I feel like David Dickinson now. Yeah, I've spent too long 00:09:46.560 --> 00:09:48.598 doing this. I think you should go 00:09:48.722 --> 00:09:49.560 to auction. Yeah. 00:09:49.600 --> 00:09:52.320 Tony was always going to be a bit of a problem. Teams! 00:09:52.360 --> 00:09:54.000 You have three hours left. 00:09:54.040 --> 00:09:55.600 Three hours. Carry on. 00:09:57.200 --> 00:09:59.520 The Aviators must be gasping... 00:09:59.560 --> 00:10:02.400 I've been reduced to a tape dispenser. ..because they're still 00:10:02.440 --> 00:10:04.680 tea-free and using a Stomp Rocket... 00:10:04.720 --> 00:10:08.640 Three, two, one. ..to start their final stage. 00:10:08.680 --> 00:10:09.680 Wow! 00:10:11.440 --> 00:10:13.120 That would set anything off. 00:10:13.160 --> 00:10:14.880 They want the rocket to hit 00:10:14.920 --> 00:10:16.720 a target, triggering a mousetrap 00:10:16.760 --> 00:10:18.640 which fires an arrow that releases 00:10:18.680 --> 00:10:20.040 a tetherball that closes 00:10:20.080 --> 00:10:21.640 a book and knocks a football 00:10:21.680 --> 00:10:24.080 into the next room. Easy! 00:10:24.120 --> 00:10:25.800 Look at that. That's a bloody target. 00:10:25.840 --> 00:10:29.038 I've got to do it half your 00:10:29.062 --> 00:10:30.320 strength, right? Oh. Ready? Yeah. 00:10:30.560 --> 00:10:32.200 That's brilliant, innit? Don't go... 00:10:32.240 --> 00:10:34.480 Don't get in the firing line yet, Paul. 00:10:34.520 --> 00:10:37.560 With arrow trajectory found, they just need to test that 00:10:37.600 --> 00:10:39.600 it reliably hits the target... 00:10:39.640 --> 00:10:41.440 Put that apple on my head. 00:10:41.480 --> 00:10:44.120 ..before perfecting the tetherball. 00:10:44.160 --> 00:10:46.320 Ready? Yeah. 00:10:46.360 --> 00:10:48.200 Well, it did it. Boom, boom, boom. 00:10:48.240 --> 00:10:50.920 Think we'll go with that. Cup of tea? 00:10:50.960 --> 00:10:52.920 Well, that's what I thought they needed to do. 00:10:52.960 --> 00:10:55.320 You're stirring my tea with your *driver! 00:10:55.360 --> 00:10:58.200 I knew the first brew was coming. 00:10:58.240 --> 00:11:00.800 Zach, less than an hour to go. Where are you now? 00:11:00.840 --> 00:11:04.080 What do you think? I think Social Mediocrity will be ready. 00:11:04.120 --> 00:11:07.600 Aviators, they have a lot of steps to get through, to check. 00:11:07.640 --> 00:11:09.038 Hey! Come on! 00:11:09.062 --> 00:11:09.920 Oh, here we go. 00:11:09.960 --> 00:11:15.080 Social Mediocrity could be edging ahead because they're sticking 00:11:15.120 --> 00:11:18.360 to their word and making time for testing in a bid 00:11:18.400 --> 00:11:20.315 to iron out any flaws. OK. My giddy 00:11:20.339 --> 00:11:21.880 aunt, it's only done and worked. 00:11:21.920 --> 00:11:23.840 Joshua, put it there, buddy. 00:11:23.880 --> 00:11:26.280 The things that Zach said when we first met him was, like, 00:11:26.320 --> 00:11:29.280 test things five, six, seven or eight times individually 00:11:29.320 --> 00:11:32.480 and then test and test and test things. 00:11:32.520 --> 00:11:34.440 Lovely, lovely, lovely. 00:11:34.480 --> 00:11:36.640 It works at the moment, which is what we really wanted 00:11:36.680 --> 00:11:37.840 to achieve on day one. 00:11:37.880 --> 00:11:39.920 Oh, missed the rope. Ah! 00:11:39.960 --> 00:11:41.920 It's gone underneath the rope, look. 00:11:41.960 --> 00:11:43.960 The fire's not working. 00:11:44.000 --> 00:11:45.240 So scrap that! 00:11:46.800 --> 00:11:49.960 Teams, five minutes left. Do you want to tie that on to the thing? 00:11:50.000 --> 00:11:53.560 Mike's hoping he has time to reposition his string 00:11:53.600 --> 00:11:56.520 while the Aviators are hoping they have enough clean mugs! 00:11:56.560 --> 00:11:58.800 Can we...can we dunk a biscuit from that? 00:11:58.840 --> 00:12:00.400 Can you sweep the floor with it? 00:12:00.440 --> 00:12:03.840 There's an air of sort of content calm in here. 00:12:03.880 --> 00:12:06.000 Whoa. That was pretty effective. 00:12:06.040 --> 00:12:08.120 Teams, you have one minute left. 00:12:08.160 --> 00:12:09.600 Are you sure? Yes. 00:12:09.640 --> 00:12:11.320 With string repositioned, 00:12:11.360 --> 00:12:14.800 Social Mediocrity now have full faith in their machine... 00:12:14.840 --> 00:12:17.440 I love it. I love it. ..as do the Aviators... 00:12:17.480 --> 00:12:19.760 It should work. There's no reason why it shouldn't. 00:12:19.800 --> 00:12:22.840 No, it should work. ..despite a flagrant lack of testing. 00:12:22.880 --> 00:12:25.280 Three, two, one! 00:12:25.320 --> 00:12:29.320 Yay! And stop. Build time is finished. Wahey! 00:12:29.360 --> 00:12:32.920 Set your machines, please, for a test run of stage one. 00:12:32.960 --> 00:12:34.240 Sorted. 00:12:34.280 --> 00:12:35.960 Feeling good about this. 00:12:36.000 --> 00:12:39.840 First up for their test run are the Aviators. 00:12:39.880 --> 00:12:42.160 They'll be hoping that the typewriter will trigger 00:12:42.200 --> 00:12:45.600 the explosives to start the leaf blower to raise the umbrella, 00:12:45.640 --> 00:12:48.440 releasing the plane to send the bowling ball to fire the 00:12:48.480 --> 00:12:51.960 Stomp Rocket and release the arrow that hits the target to start 00:12:52.000 --> 00:12:55.800 the tetherball, sending the football into the hallway. 00:12:55.840 --> 00:12:57.960 Fingers crossed! 00:12:58.000 --> 00:13:00.720 Aviators, it is the semifinal. 00:13:00.760 --> 00:13:04.560 You've made it this far, and you're none of you exactly 00:13:04.600 --> 00:13:07.000 crackling with tension at this point. 00:13:07.040 --> 00:13:10.080 We've done all the pre-flight checks. They all seem OK. 00:13:10.120 --> 00:13:11.320 I'm not so confident. 00:13:11.360 --> 00:13:14.120 I mean, they haven't done a single test run, so... So you haven't seen 00:13:14.160 --> 00:13:15.600 it all run. No. So, wait a minute. 00:13:15.640 --> 00:13:17.680 We checked when people weren't watching. 00:13:17.720 --> 00:13:20.400 Oh, you did secret tests for testing? Secret testing, yeah. 00:13:20.440 --> 00:13:24.080 Right. Well, in your own time, chaps, start a test run, 00:13:24.120 --> 00:13:26.400 please, of stage one of your machine. Begin. 00:13:26.440 --> 00:13:29.120 Fire away, mate. Roger dodger. Good luck. 00:13:44.360 --> 00:13:45.960 That's the problem. 00:13:46.000 --> 00:13:47.320 Arrow completely missed! 00:13:48.800 --> 00:13:51.760 So we're going again now. It's going. 00:13:51.800 --> 00:13:53.320 I quite like that. 00:13:53.360 --> 00:13:54.600 That is nice. 00:13:57.480 --> 00:13:59.360 And you're into the next room! 00:14:01.760 --> 00:14:03.680 High five! 00:14:03.720 --> 00:14:07.360 Albert's typewriter key did trigger the explosive on the balloon, 00:14:07.400 --> 00:14:10.280 but he started the leaf blower himself. 00:14:10.320 --> 00:14:13.800 And after the bowling ball and Stomp Rocket fired the first arrow, 00:14:13.840 --> 00:14:18.080 the second missed its target, and Albert triggered the tetherball. 00:14:18.120 --> 00:14:21.160 Less tea and more testing tomorrow, please. 00:14:21.200 --> 00:14:24.000 We thought a couple of things could go wrong slightly. 00:14:24.040 --> 00:14:26.320 I mean, we put some good stuff together, actually. 00:14:26.360 --> 00:14:29.080 I mean, visually, theirs is brilliant and there's lots 00:14:29.120 --> 00:14:30.520 packed into it. 00:14:30.560 --> 00:14:31.920 Next - Mike, Baz and Josh. 00:14:33.600 --> 00:14:35.040 Social Mediocrity. 00:14:35.080 --> 00:14:38.120 Well, I'm assuming it's you guys because you seem to be different. 00:14:38.160 --> 00:14:41.560 We were done. We're done with being ridiculed for the fact that we don't 00:14:41.600 --> 00:14:44.520 test at all. So today we were really keen to do the opposite. 00:14:44.560 --> 00:14:47.720 So we had... We gave it actually quite a long time to test. 00:14:47.760 --> 00:14:52.040 They want the typewriter to set Tony swinging, rolling the globe to knock 00:14:52.080 --> 00:14:55.760 the plant and drop the book, yanking the truck to light the matches 00:14:55.800 --> 00:14:59.000 that burn the rope, dropping the weight that triggers the fan 00:14:59.040 --> 00:15:01.880 to blow the sail into the next room. 00:15:01.920 --> 00:15:04.280 Zach, they have transformed themselves. Truly. 00:15:04.320 --> 00:15:05.840 I mean, I think it's going to work. 00:15:05.880 --> 00:15:08.320 I'm just wondering if it's going to be spectacular enough. 00:15:08.360 --> 00:15:10.280 Well, we shall see. We shall find that out. 00:15:10.320 --> 00:15:12.800 Good luck, chaps. In your own time, start stage one of your 00:15:12.840 --> 00:15:14.520 chain reaction machine. 00:15:14.560 --> 00:15:16.040 Classic, right off the bat. 00:15:16.080 --> 00:15:18.760 And the desktop toy is so mesmerising. 00:15:18.800 --> 00:15:21.640 But it's not doing anything... Oh! 00:15:21.680 --> 00:15:23.120 Now it is. 00:15:26.560 --> 00:15:28.520 The match is lit. That's a good burn. 00:15:28.560 --> 00:15:30.440 That is a good burn. 00:15:30.480 --> 00:15:32.000 Woooo...! 00:15:34.440 --> 00:15:37.480 Tony may have kept us waiting, but it was worth it. 00:15:37.520 --> 00:15:41.880 The last-minute change to the string meant it burnt perfectly, dropping 00:15:41.920 --> 00:15:44.840 the duck that hit the switch for the fan. 00:15:46.240 --> 00:15:48.000 It was more relief than surprise. 00:15:48.040 --> 00:15:49.634 Theirs was good. It was good. 00:15:49.658 --> 00:15:51.360 I was very impressed with the match. 00:15:51.400 --> 00:15:54.000 For pilots, they're incredibly risky! 00:15:54.040 --> 00:15:56.520 My hope at this point is that they go too crazy. 00:15:58.560 --> 00:16:01.000 So the rivals know what they're up against. 00:16:01.040 --> 00:16:04.080 The place in the final is still anyone's. 00:16:11.120 --> 00:16:14.840 I've asked two teams of left-field engineers to build chain reaction 00:16:14.880 --> 00:16:18.240 machines that will allow me to cook sausages as I complete the latest 00:16:18.280 --> 00:16:21.320 instalment of my blockbusting memoirs. 00:16:21.360 --> 00:16:23.280 Chapter Six - Sandwiches. 00:16:23.320 --> 00:16:27.280 On day one of this semifinal, Social Mediocrity left time 00:16:27.320 --> 00:16:30.600 for testing and had a perfect run in my study... 00:16:32.240 --> 00:16:35.440 ..while the Aviators drank tea instead of testing 00:16:35.480 --> 00:16:37.440 and paid the price. 00:16:37.480 --> 00:16:38.600 Morning, teams. 00:16:38.640 --> 00:16:42.280 Well, yesterday might best be described as a mixed bag. 00:16:42.320 --> 00:16:46.000 Today is about continuing your build across the hallway. 00:16:46.040 --> 00:16:47.120 It is a semifinal. 00:16:47.160 --> 00:16:48.600 You are under pressure. 00:16:48.640 --> 00:16:49.960 So here's some more. 00:16:50.000 --> 00:16:52.720 I want you to incorporate a specific scientific principle 00:16:52.760 --> 00:16:54.520 into your build today. 00:16:54.560 --> 00:16:58.280 That theory is liquid viscosity and fluidity. 00:16:59.720 --> 00:17:01.960 How and where you use it is up to you, 00:17:02.000 --> 00:17:04.000 but use it you must. 00:17:04.040 --> 00:17:05.400 You have ten hours. 00:17:05.440 --> 00:17:07.680 Carry on and good luck. 00:17:07.720 --> 00:17:09.000 Stern kind of guy. 00:17:09.040 --> 00:17:11.160 One of those... Yeah. 00:17:11.200 --> 00:17:14.000 Mm, honey. You can put something on it, but, I mean, it's not 00:17:14.040 --> 00:17:15.640 going to be a big connection. 00:17:15.680 --> 00:17:18.640 We can use water, we can use oil, we can use washing-up liquid, 00:17:18.680 --> 00:17:22.120 we can use a cup of tea, we can use anything, cos it's all liquid. 00:17:22.160 --> 00:17:26.440 We've asked both teams to include liquid fluidity and viscosity 00:17:26.480 --> 00:17:28.120 in at least one transition. 00:17:28.160 --> 00:17:32.360 Here's Shini Somara to explain what the heck that means. 00:17:35.760 --> 00:17:39.960 Viscosity describes a liquid's ability to flow, but it also 00:17:40.000 --> 00:17:44.160 describes an object's ability to flow through the liquid. 00:17:44.200 --> 00:17:49.200 So if I was to drop a marble in water, it just travels straight 00:17:49.240 --> 00:17:52.320 to the bottom without much resistance because water 00:17:52.360 --> 00:17:56.000 is a very thin liquid and not very viscous. 00:17:56.040 --> 00:17:59.600 But what about vegetable oil, corn syrup or honey? 00:18:02.360 --> 00:18:04.360 Oh, that's not very viscous! 00:18:06.760 --> 00:18:08.120 A bit more viscous. 00:18:10.200 --> 00:18:13.800 And honey is extremely viscous, clearly, because the marble 00:18:13.840 --> 00:18:17.320 is taking a long time to travel through it, because there's a lot 00:18:17.360 --> 00:18:22.280 of friction between the molecules resisting the motion through it. 00:18:22.320 --> 00:18:24.400 So that's viscosity. 00:18:26.680 --> 00:18:28.560 That'll go great, that. Paul. 00:18:28.600 --> 00:18:30.960 Aye? Come out, come and have a look at this. 00:18:31.000 --> 00:18:34.480 There's a potential to use fluidity. 00:18:34.520 --> 00:18:37.800 The Aviators are planning to use viscosity at the end 00:18:37.840 --> 00:18:39.280 of their machine. 00:18:39.320 --> 00:18:40.760 That's a bucket full of oil. 00:18:41.920 --> 00:18:44.200 Swing, swing, swing, swing, swing. 00:18:44.240 --> 00:18:46.440 Latch. Oil drips out. 00:18:46.480 --> 00:18:49.760 This oil-dripping bucket stage is earmarked as the end 00:18:49.800 --> 00:18:53.000 of their most complex room yet. 00:18:54.360 --> 00:18:56.560 The football from the study will knock skittles, 00:18:56.600 --> 00:18:58.720 starting a train set that topples cups, 00:18:58.760 --> 00:19:02.720 that hits the controller of a flying drone that tips a seesaw that makes 00:19:02.760 --> 00:19:07.440 a sewing machine pull cloth, opening an umbrella, knocking a guitar 00:19:07.480 --> 00:19:12.480 that releases a banner, sending a bucket of goo into the next room. 00:19:12.520 --> 00:19:14.600 Obviously! 00:19:14.640 --> 00:19:18.360 Ensuring the bucket latch is reliable is key to an impressive 00:19:18.400 --> 00:19:19.800 use of viscosity... 00:19:22.680 --> 00:19:25.760 ..and requires some hefty carpentry. 00:19:25.800 --> 00:19:27.560 Do you like that? 00:19:28.720 --> 00:19:30.960 You have to sort of adapt and overcome. 00:19:31.000 --> 00:19:34.120 I mean, he's got a couple of flesh wounds as far as I'm concerned. 00:19:34.160 --> 00:19:37.520 You know, I don't know what they are, what their challenges are, 00:19:37.560 --> 00:19:40.640 but obviously the things that are at height are always an issue to me. 00:19:40.680 --> 00:19:43.320 Things that are on the floor, you know, I can't get over them. 00:19:43.360 --> 00:19:45.840 So it adds a little bit of complexity to our builds, 00:19:45.880 --> 00:19:48.840 but we can lean on one another to sort of get that done. 00:19:48.880 --> 00:19:50.040 So it's not a problem. 00:19:50.080 --> 00:19:52.000 That one's done. Pull, boom. 00:19:53.000 --> 00:19:56.200 Their viscosity stage is off to a flying start. 00:19:56.240 --> 00:19:59.520 While Social Mediocrity seemed to be ignoring it. 00:19:59.560 --> 00:20:02.720 I'm always for letting your subconscious deal with things in the background. 00:20:02.760 --> 00:20:04.760 So by lunchtime we'll be like... viscosity. 00:20:04.800 --> 00:20:07.080 When we get to a stage where we're happy with where it is, 00:20:07.120 --> 00:20:09.800 then we'll realise how much time we've got to be as straightforward 00:20:09.840 --> 00:20:12.120 or as complicated with the liquid viscosity part of it. 00:20:12.160 --> 00:20:14.560 You know, that's the most convincing way of saying, 00:20:14.600 --> 00:20:17.120 "Er, I'll do it later," I've ever heard. 00:20:17.160 --> 00:20:18.320 A place for this. 00:20:19.360 --> 00:20:20.440 I'll leave me alone. 00:20:20.480 --> 00:20:22.675 There's going to be stuff here. Yeah, yeah. 00:20:22.699 --> 00:20:24.200 Because the boat's going to come here... 00:20:24.240 --> 00:20:26.200 But Mike and Baz are conjuring up a plan. 00:20:26.240 --> 00:20:28.720 That bike stops somewhere like this. Yeah. 00:20:28.760 --> 00:20:30.320 So if we had a post in here... 00:20:30.360 --> 00:20:32.360 Put a beam across there, kick stuff out that way, 00:20:32.400 --> 00:20:35.058 triggers the drop of the sweets into the 00:20:35.082 --> 00:20:35.960 Archimedes *, pulls it up to the top. Yeah. 00:20:36.000 --> 00:20:38.720 The idea is that the fan from the kitchen 00:20:38.760 --> 00:20:41.680 pulls a pin, releasing an ET-inspired bike 00:20:41.720 --> 00:20:44.000 to fly and pull a card from a funnel 00:20:44.040 --> 00:20:47.760 that releases marbles into a home-made Archimedes * 00:20:47.800 --> 00:20:50.880 that should transport them uphill. 00:20:50.920 --> 00:20:52.640 Note "should". 00:20:54.320 --> 00:20:56.160 Viscosity. 00:20:56.200 --> 00:20:59.240 Josh's subconscious seemed to be saying something. 00:20:59.280 --> 00:21:01.160 And Mike seems to have heard. 00:21:01.200 --> 00:21:03.200 This contraption that I'm making here 00:21:03.240 --> 00:21:05.480 was supposed to transport sweets 00:21:05.520 --> 00:21:07.840 up, but we're going to see 00:21:07.880 --> 00:21:10.000 if we can transport water. 00:21:11.040 --> 00:21:12.920 Mike's brave fluid solution... 00:21:12.960 --> 00:21:16.160 Yeah, oh, it's an amazing solution if you can make that work. 00:21:16.200 --> 00:21:19.080 ..is to try and use his bodged Archimedes * 00:21:19.120 --> 00:21:22.200 to transport not marbles, but a fluid. 00:21:22.240 --> 00:21:23.680 Meanwhile... 00:21:23.720 --> 00:21:25.760 I went for a manicure. 00:21:25.800 --> 00:21:27.180 I know it sounds daft. A 00:21:27.204 --> 00:21:28.040 manicure? I went for a manicure 00:21:28.080 --> 00:21:31.680 and I went into the shop, no words of a lie, and I said, Can I have 50% discount? 00:21:31.720 --> 00:21:33.600 And they said, "Well, why?" 00:21:35.200 --> 00:21:38.360 The Aviators haven't just been working on dodgy gags. 00:21:38.400 --> 00:21:41.080 They've created the skittle and toy train combo 00:21:41.120 --> 00:21:43.000 that should launch their drone. 00:21:43.040 --> 00:21:44.880 It's adjustable. 00:21:46.840 --> 00:21:48.640 The falling skittles release a card... 00:21:48.680 --> 00:21:49.880 Choo-choo! 00:21:49.920 --> 00:21:52.680 ..that starts the train and as the cups fall, 00:21:52.720 --> 00:21:55.600 the remote for the drone is pressed. 00:21:55.640 --> 00:21:56.760 Clever stuff. 00:21:56.800 --> 00:21:58.600 It is the semifinal. 00:21:58.640 --> 00:22:00.480 They are under pressure. 00:22:00.520 --> 00:22:02.360 They could do with some good news. 00:22:02.400 --> 00:22:03.560 I haven't got any. 00:22:03.600 --> 00:22:05.240 Teams! 00:22:06.680 --> 00:22:08.000 "You have four hours left." 00:22:08.040 --> 00:22:10.280 "Four hours left." "Carry on." Carry on, right. 00:22:10.320 --> 00:22:12.040 Now the muse. 00:22:12.080 --> 00:22:13.880 Yeah, time is not good for us today. 00:22:13.920 --> 00:22:15.560 And I'm a little bit worried about it. 00:22:15.600 --> 00:22:17.280 I am actually very, very worried about it. 00:22:17.320 --> 00:22:19.920 And that's not the only thing to worry about. 00:22:19.960 --> 00:22:22.680 Well, because it's not quite watertight at the edges 00:22:22.720 --> 00:22:24.920 it's taking far too long for that to get to the top, 00:22:24.960 --> 00:22:27.360 so, in the end, we're going to have to clean this out and go 00:22:27.400 --> 00:22:29.440 with plan A of it transporting marbles. 00:22:29.480 --> 00:22:32.480 At least there's better news from Baz's ET-themed bike. 00:22:32.520 --> 00:22:35.560 So it's going to be suspended from up in the doorway here. 00:22:35.600 --> 00:22:37.040 So when it's released... 00:22:38.360 --> 00:22:39.720 .. it comes to a halt here. 00:22:39.760 --> 00:22:41.565 That energy is getting transferred to something 00:22:41.589 --> 00:22:43.680 else, which I think is pull balls into a hopper. 00:22:43.720 --> 00:22:46.080 And Josh is doing what he does best, 00:22:46.120 --> 00:22:48.360 putting toys to creative use. 00:22:49.440 --> 00:22:50.720 OK, we're out. 00:22:53.360 --> 00:22:54.720 He will soon. 00:22:54.760 --> 00:22:56.280 Repeatability. 00:22:56.320 --> 00:22:59.320 They're hoping the looping car hits a fishing net, 00:22:59.360 --> 00:23:00.960 tipping a puzzle cube 00:23:01.000 --> 00:23:02.680 that's magically solved down a ramp, 00:23:02.720 --> 00:23:04.240 hitting a mannequin's hand 00:23:04.280 --> 00:23:06.360 that pulls a skateboard off a shelf, 00:23:06.400 --> 00:23:08.400 that starts a chain fountain, 00:23:08.440 --> 00:23:09.640 pulling a pin 00:23:09.680 --> 00:23:12.440 that sends a second car into the next room. 00:23:14.960 --> 00:23:17.440 As Josh and Mike struggle with their stages, 00:23:17.480 --> 00:23:20.560 it looks to me as if the Aviators are pulling away. 00:23:20.600 --> 00:23:22.680 Zach, less than an hour to go 00:23:22.720 --> 00:23:25.480 and the Aviators, they've finished it, 00:23:25.520 --> 00:23:26.840 they've tested it. 00:23:26.880 --> 00:23:29.680 This is the best room that we've seen. 00:23:29.720 --> 00:23:31.000 I don't say that lightly. 00:23:31.040 --> 00:23:32.920 However, where are they? 00:23:32.960 --> 00:23:34.320 They're not in there right now. 00:23:34.360 --> 00:23:36.280 They could easily fit in maybe ten more tests. 00:23:36.320 --> 00:23:39.480 I just hope it works, I really do, and we've got less than an hour to find out. 00:23:39.520 --> 00:23:42.040 I want this one to work because it is so fantastic. 00:23:42.080 --> 00:23:45.040 Over here it's quite a different atmosphere. 00:23:45.080 --> 00:23:48.280 We should approach it slowly because things are quite tense 00:23:48.320 --> 00:23:50.000 in the Social Mediocrity camp. 00:23:50.040 --> 00:23:51.520 What's the story? 00:23:51.560 --> 00:23:53.360 When we look at Social Mediocrity, 00:23:53.400 --> 00:23:55.320 I think they're running out of time. 00:23:55.360 --> 00:23:57.880 They're still building to the very last second. Yes. 00:23:57.920 --> 00:24:01.560 Let me ask you something. Do you see anything that resembles a fluid in there? 00:24:01.600 --> 00:24:02.720 Anything viscous? 00:24:02.760 --> 00:24:05.000 There's no evidence of the scientific principle. 00:24:05.040 --> 00:24:06.200 I think they can hear us. 00:24:07.520 --> 00:24:08.920 We can definitely hear you. 00:24:08.960 --> 00:24:10.640 I'm just thinking, is there a way 00:24:10.680 --> 00:24:12.840 that we can have liquid? 00:24:12.880 --> 00:24:15.120 Mike and Baz are conspiring to create 00:24:15.160 --> 00:24:17.680 a last-ditch attempt to use viscosity. 00:24:17.720 --> 00:24:19.920 Do you think we've got enough oomph? Don't know. 00:24:19.960 --> 00:24:22.120 You've got to figure out a way of tipping that... 00:24:23.440 --> 00:24:26.960 ..to a funnel, which weighs something down and pulls a pin out of the top there. 00:24:27.000 --> 00:24:28.880 with so little time to perfect it, 00:24:28.920 --> 00:24:32.360 this could be a slippery slope to disaster, 00:24:32.400 --> 00:24:34.600 or a successful slippery slope 00:24:34.640 --> 00:24:36.960 of guttering covered in bubble bath. 00:24:37.000 --> 00:24:39.800 Teams, you have three minutes! 00:24:39.840 --> 00:24:42.280 That's a quarter of a dozen minutes. 00:24:42.320 --> 00:24:44.040 That's some form of insanity. 00:24:44.080 --> 00:24:45.400 Three minutes. 00:24:45.440 --> 00:24:47.600 Three. We're making popcorn. Do you want some? 00:24:47.640 --> 00:24:49.040 Stop taking the mickey. 00:24:49.080 --> 00:24:51.520 Everything I'm doing right now is useless. 00:24:51.560 --> 00:24:52.880 No, you're not useless. 00:24:52.920 --> 00:24:55.800 Well, the red team are, I think, actually working 00:24:55.840 --> 00:24:57.480 on tomorrow's build. 00:24:57.520 --> 00:25:00.314 Josh, can you grab the car, please? Just grab the 00:25:00.338 --> 00:25:01.360 car off the shelf. Where is it? It's on the shelf. 00:25:01.400 --> 00:25:04.680 Social Mediocrity, I don't think they're going to make it. 00:25:05.880 --> 00:25:07.800 Quick, quick, quick, quick. 00:25:07.840 --> 00:25:09.480 Ten, nine... 00:25:09.520 --> 00:25:11.440 Go, go, go, go. ..eight, seven, 00:25:11.480 --> 00:25:13.280 six, five, 00:25:13.320 --> 00:25:15.320 four, three, 00:25:15.360 --> 00:25:17.320 two, one. 00:25:17.360 --> 00:25:21.400 OK, today's build time is up. 00:25:21.440 --> 00:25:22.920 That might work. 00:25:22.960 --> 00:25:24.000 Imagine if it does. 00:25:24.040 --> 00:25:25.640 Not a bad deal. 00:25:25.680 --> 00:25:28.000 The Aviators are testing first. 00:25:28.040 --> 00:25:30.040 They've got an incredible sense of deja vu, 00:25:30.080 --> 00:25:32.280 because what happened is you built it, 00:25:32.320 --> 00:25:33.800 did a quick test, 00:25:33.840 --> 00:25:35.160 and then had a cup of tea. 00:25:35.200 --> 00:25:36.440 Well, it's all about tea. 00:25:36.480 --> 00:25:38.000 The kettle is being tested to death. 00:25:38.040 --> 00:25:40.680 It's not about the tea. 00:25:41.880 --> 00:25:44.200 They're hoping skittles start the train 00:25:44.240 --> 00:25:45.920 that knocks over the cups 00:25:45.960 --> 00:25:47.360 to launch the drone, 00:25:47.400 --> 00:25:50.240 tipping the seesaw to start the sewing machine 00:25:50.280 --> 00:25:52.960 that drops the weight to trigger the umbrella 00:25:53.000 --> 00:25:54.440 and topple the guitar, 00:25:54.480 --> 00:25:56.080 unfurling the banner 00:25:56.120 --> 00:25:59.080 to send the bucket of goo onto its latch. 00:26:00.160 --> 00:26:02.080 Zach, well, I mean, I love the way it looks. 00:26:02.120 --> 00:26:03.480 I agree with Steve 00:26:03.520 --> 00:26:06.160 and that the kettle has been more tested, so... 00:26:06.200 --> 00:26:09.240 All right. Right, well, look, one way to prove this. 00:26:09.280 --> 00:26:11.920 Please run stage two of your chain reaction machine. 00:26:11.960 --> 00:26:14.160 Excellent, on you go. Here we go. 00:26:14.200 --> 00:26:15.760 I hope this one works. 00:26:15.800 --> 00:26:17.200 That works. 00:26:17.240 --> 00:26:18.760 So far, so good. 00:26:20.040 --> 00:26:21.280 The card gets pulled out. 00:26:21.320 --> 00:26:23.920 That completes the circuit... 00:26:23.960 --> 00:26:26.840 causes the drone to go, which is amazing. 00:26:26.880 --> 00:26:28.880 And that's... I love the sewing machine. 00:26:40.120 --> 00:26:44.440 Oh, gentlemen, I believe you may continue to enjoy your tea breaks. 00:26:44.480 --> 00:26:47.480 I don't know what's in the tea, but it's worked. 00:26:47.520 --> 00:26:50.400 This chaotic, dynamic machine 00:26:50.440 --> 00:26:52.720 ran perfectly with fluid motion, 00:26:52.760 --> 00:26:55.400 demonstrated beautifully? 00:26:55.440 --> 00:26:57.040 It was a fabulous run. 00:26:57.080 --> 00:27:00.800 You know, we thought... We were getting at each other earlier saying, "We've done nowt work, 00:27:00.840 --> 00:27:02.960 we're getting nowhere, we've achieved nothing." 00:27:03.000 --> 00:27:04.600 And we really felt like that, didn't we? 00:27:04.640 --> 00:27:06.760 Unbelievable. Stop asking us about those people. 00:27:06.800 --> 00:27:08.240 We know they're great. 00:27:08.280 --> 00:27:10.360 Yeah, they can fly planes and make machines. 00:27:10.400 --> 00:27:11.840 Yeah, we know they're good. 00:27:11.880 --> 00:27:13.440 Another flag. Yeah, yeah. 00:27:13.480 --> 00:27:15.760 No, it's brilliant. It's like a comedy. 00:27:15.800 --> 00:27:17.200 It's like a comedy cartoon. 00:27:17.240 --> 00:27:19.440 Next, Social Mediocrity, 00:27:19.480 --> 00:27:23.440 who didn't quite finish their viscosity stage in time. 00:27:23.480 --> 00:27:25.480 Social Mediocrity, 00:27:25.520 --> 00:27:27.080 this is a bit of a first. 00:27:27.120 --> 00:27:29.160 I mean, you've pushed it to the wire before, 00:27:29.200 --> 00:27:30.800 but you haven't made it this time. 00:27:30.840 --> 00:27:33.200 There is a million to one chance it will work. 00:27:33.240 --> 00:27:37.000 The bike should release marbles into Mike's Archimedes *, 00:27:37.040 --> 00:27:38.440 dropping them into the gutter 00:27:38.480 --> 00:27:40.880 where bubble bath might be tipped into a pot 00:27:40.920 --> 00:27:43.920 that triggers Josh's toy car and puzzle cube, 00:27:43.960 --> 00:27:45.800 releasing a chain fountain 00:27:45.840 --> 00:27:48.440 that sends another toy car into the kitchen. 00:27:48.480 --> 00:27:52.520 Zach, I mean, if it worked, that's a great machine. 00:27:52.560 --> 00:27:54.280 Yeah, I mean, it's fantastic, 00:27:54.320 --> 00:27:57.040 but it's definitely going to have one intervention today, sadly. 00:27:57.080 --> 00:28:00.000 So in your own time and to whatever extent you're able, 00:28:00.040 --> 00:28:02.000 start stage two, please, 00:28:02.040 --> 00:28:03.640 of your chain reaction machine. 00:28:03.680 --> 00:28:06.560 Baz, make the machine not work quite properly. 00:28:06.600 --> 00:28:08.680 It's going to work, it's just going to work. 00:28:08.720 --> 00:28:10.120 Right, that's worked. 00:28:10.160 --> 00:28:11.880 That's worked. I love that. 00:28:11.920 --> 00:28:15.680 But I do think you're spinning just slowly, releasing... The chain. 00:28:15.720 --> 00:28:17.320 slowly releasing that. 00:28:17.360 --> 00:28:19.200 Archimedes *. 00:28:19.240 --> 00:28:21.200 Here they come. 00:28:21.240 --> 00:28:23.160 This is the suspense we wanted. 00:28:24.760 --> 00:28:26.040 Oh, there we are. 00:28:28.840 --> 00:28:30.160 Go on. 00:28:30.200 --> 00:28:32.800 There is some coming into the bucket. It could happen. 00:28:32.840 --> 00:28:34.880 It actually could work right now. 00:28:34.920 --> 00:28:37.720 If this works, I'm having them buy me a lotto ticket. 00:28:43.560 --> 00:28:46.160 Oh! One failure at the end. Oh! 00:28:46.200 --> 00:28:48.800 Rubik's Cube missed the hand. Didn't quite hit the hand. Yeah. 00:28:48.840 --> 00:28:50.080 So much protesting. 00:28:50.120 --> 00:28:53.040 The million to one bit that shouldn't have worked 00:28:53.080 --> 00:28:54.360 actually worked. 00:28:54.400 --> 00:28:55.640 Extraordinary. 00:28:55.680 --> 00:28:58.320 The unfinished bubble bath pour filled the bucket 00:28:58.360 --> 00:29:00.080 and released the toy car, 00:29:00.120 --> 00:29:02.760 but the puzzle cube didn't hit the hand 00:29:02.800 --> 00:29:04.240 with enough force. 00:29:05.600 --> 00:29:08.720 The miracle happened here because we literally with three seconds to go 00:29:08.760 --> 00:29:10.760 we drilled two holes in here, 00:29:10.800 --> 00:29:13.080 but we were expecting all of this liquid 00:29:13.120 --> 00:29:15.360 which needed to go into a bucket down there. 00:29:15.400 --> 00:29:17.960 We just expected most of the liquid to go past. 00:29:18.000 --> 00:29:20.840 So both teams will start tomorrow in high spirits. 00:29:20.880 --> 00:29:24.480 But Zach will only send one of them to the final. 00:29:24.520 --> 00:29:27.240 They tried to up their game a little bit because we did a lot 00:29:27.280 --> 00:29:30.400 yesterday and they've tried sort of match that today. 00:29:30.440 --> 00:29:33.080 They're still no anywhere near. 00:29:33.120 --> 00:29:34.960 Confident talk that. 00:29:41.960 --> 00:29:45.120 Today, Zach will award either the Aviators... 00:29:45.160 --> 00:29:47.320 I've been reduced to a tape dispenser. 00:29:47.360 --> 00:29:49.200 ..or Social Mediocrity... 00:29:49.240 --> 00:29:50.480 I think you should go auction. 00:29:50.520 --> 00:29:52.080 ..a place in the final. 00:29:52.120 --> 00:29:53.880 In the next ten hours 00:29:53.920 --> 00:29:57.440 they need to create a contraption that cooks sausages in my kitchen, 00:29:57.480 --> 00:30:00.400 link it up with their bedroom and landing machines, 00:30:00.440 --> 00:30:01.840 then run it all as one. 00:30:01.880 --> 00:30:03.308 That might work. Check. 00:30:03.332 --> 00:30:04.200 Check. Check. 00:30:04.240 --> 00:30:07.040 Over the last two days, they've shared successes... 00:30:07.080 --> 00:30:09.160 Hey! Way-hay. 00:30:09.200 --> 00:30:10.480 ..and failures... 00:30:12.440 --> 00:30:13.920 Arrow completely missed. 00:30:13.960 --> 00:30:15.960 ..so this could go either way. 00:30:16.000 --> 00:30:17.320 Morning, teams. 00:30:17.360 --> 00:30:19.920 It is the final day of a semifinal 00:30:19.960 --> 00:30:22.080 that is on a knife edge. 00:30:22.120 --> 00:30:25.560 So, both teams have got a lot on your plates. 00:30:25.600 --> 00:30:29.040 But I think there's room for just one more morsel on top. 00:30:29.080 --> 00:30:32.360 In your workshops, you will find a mystery object that you must 00:30:32.400 --> 00:30:34.440 incorporate into today's build. 00:30:34.480 --> 00:30:37.880 Where and how you use it is up to you, but use it you must. 00:30:39.000 --> 00:30:41.000 Ten hours, teams, and good luck. 00:30:43.160 --> 00:30:44.160 There we go. 00:30:44.200 --> 00:30:45.960 Ah, look at that. 00:30:46.000 --> 00:30:47.120 It's a whisk. 00:30:47.160 --> 00:30:48.760 How do we level through this thing? 00:30:48.800 --> 00:30:50.680 Do you know what that is? It's a weight. 00:30:50.720 --> 00:30:51.797 Maybe that's the task. Use the 00:30:51.821 --> 00:30:53.040 ribbon instead? Yeah. 00:30:53.080 --> 00:30:54.320 Does that beat an egg? 00:30:54.360 --> 00:30:56.520 It's not going to really work out for me, is it? 00:30:56.560 --> 00:31:00.960 Both teams must incorporate the same mystery object into today's build. 00:31:01.000 --> 00:31:04.080 But what fascinating engineering principles 00:31:04.120 --> 00:31:07.400 might lie hidden within an antique egg whisk. 00:31:11.000 --> 00:31:14.520 This is a good old-fashioned egg whisk, but it's also packed 00:31:14.560 --> 00:31:16.280 full of engineering because 00:31:16.320 --> 00:31:19.240 one slow rotation of the handle leads to 00:31:19.280 --> 00:31:21.640 a much faster rotation of the whisk. 00:31:21.680 --> 00:31:24.080 And the way it works is all down to gears. 00:31:24.120 --> 00:31:27.240 And when I turn this large gear, 00:31:27.280 --> 00:31:29.840 it actually powers these smaller little gears 00:31:29.880 --> 00:31:32.440 to rotate several times more. 00:31:32.480 --> 00:31:35.480 The rotational force of these moving parts 00:31:35.520 --> 00:31:37.320 is also known as torque, 00:31:37.360 --> 00:31:39.360 and maybe the teams use this torque 00:31:39.400 --> 00:31:42.040 to perhaps wind up a string 00:31:42.080 --> 00:31:44.120 or unwinding that string 00:31:44.160 --> 00:31:45.720 could turn the handle, 00:31:45.760 --> 00:31:48.520 triggering the next reaction. 00:31:48.560 --> 00:31:51.760 We'll put this in the middle of the kitchen so we don't forget about it. 00:31:51.800 --> 00:31:54.320 First impression is to leave it as a weight at the moment. 00:31:54.360 --> 00:31:55.680 Would you like a quick demo? 00:31:57.280 --> 00:31:58.600 Works every time. 00:31:58.640 --> 00:31:59.760 Brilliant, innit? 00:31:59.800 --> 00:32:02.960 Mm, not exactly a demonstration of torque. 00:32:03.000 --> 00:32:05.480 The very first thing we're doing is tidying up. 00:32:05.520 --> 00:32:08.520 The rivals are ignoring the whisk in a bid to keep the rest 00:32:08.560 --> 00:32:10.280 of their machines on track. 00:32:10.320 --> 00:32:13.520 Hopefully by about lunchtime we'll have a few steps that are working. 00:32:13.560 --> 00:32:17.760 We then can insert other little bits of intricacies as we go along. 00:32:17.800 --> 00:32:20.480 Baz is going to work on the final piece. 00:32:20.520 --> 00:32:22.600 The idea is if the final piece is there 00:32:22.640 --> 00:32:25.160 you can kind of short circuit to at least finishing. 00:32:25.200 --> 00:32:28.640 Both teams are splitting up to fix their previous issues too. 00:32:28.680 --> 00:32:29.960 That can't fail. 00:32:30.000 --> 00:32:31.320 Little target... 00:32:32.920 --> 00:32:34.480 ..big target. 00:32:34.520 --> 00:32:37.200 And Steve's in charge of making the arrow hit the target 00:32:37.240 --> 00:32:38.760 back in the study. 00:32:38.800 --> 00:32:41.080 It could still be a damp squib and it could still miss. 00:32:41.120 --> 00:32:43.120 I didn't say damn squid. 00:32:43.160 --> 00:32:44.240 Is it not a damp squib? 00:32:44.280 --> 00:32:47.200 I don't know what a squib is but a squid is definitely damp, isn't it? 00:32:49.160 --> 00:32:50.880 What is a squib? 00:32:52.040 --> 00:32:53.480 Squib game over, 00:32:53.520 --> 00:32:56.000 the rest of the Aviators' machine is taking shape 00:32:56.040 --> 00:32:59.040 with Albert's gun, joined by Paul's mincer. 00:33:00.480 --> 00:33:01.920 That's the principle. 00:33:01.960 --> 00:33:04.560 And the kettle, obviously. 00:33:07.760 --> 00:33:09.320 They want a see-saw to fire 00:33:09.360 --> 00:33:11.600 Albert's gun to knock over cups, 00:33:11.640 --> 00:33:13.800 which switch on Paul's mincer, 00:33:13.840 --> 00:33:16.240 winding a string that tips a bucket 00:33:16.280 --> 00:33:18.040 to turn on Steve's kettle, 00:33:18.080 --> 00:33:19.840 steaming some kitchen roll 00:33:19.880 --> 00:33:21.040 that drops a bucket, 00:33:21.080 --> 00:33:23.360 pulling a string that shuts the fridge 00:33:23.400 --> 00:33:24.800 and starts a firework, 00:33:24.840 --> 00:33:26.760 making a digger drop my sausages 00:33:26.800 --> 00:33:28.040 into the pan. 00:33:28.080 --> 00:33:29.720 But there's no egg whisk yet. 00:33:31.400 --> 00:33:33.240 Got to put Steve's arm on there. Yeah, yeah. 00:33:33.280 --> 00:33:34.720 I like this. Do you? 00:33:34.760 --> 00:33:36.480 Oh, I've done something right today then. 00:33:36.520 --> 00:33:38.640 Yes, it's an extender. 00:33:38.680 --> 00:33:41.360 Social Mediocrity aren't being left behind. 00:33:44.080 --> 00:33:47.360 Mike, who in the heat spent hours ruining my bookcase 00:33:47.400 --> 00:33:49.000 to make its shelves collapse, 00:33:49.040 --> 00:33:52.440 is turning his attention to my dining table 00:33:52.480 --> 00:33:55.920 to create what he hopes will be a stunning bull run. 00:33:55.960 --> 00:33:57.320 Ah-ha! 00:33:57.360 --> 00:33:59.040 Josh is troubleshooting. 00:34:00.080 --> 00:34:01.600 Oh! What happened? 00:34:01.640 --> 00:34:03.400 It missed the hole in the wall. 00:34:03.440 --> 00:34:05.080 You never miss your hole! 00:34:05.120 --> 00:34:08.320 And Baz is working on an eye-catching sausage dropper. 00:34:08.360 --> 00:34:10.760 I'm much more relaxed today 00:34:10.800 --> 00:34:13.280 just because we had that bit of a bright spot, 00:34:13.320 --> 00:34:15.440 like, later on in the day 00:34:15.480 --> 00:34:18.120 where we fully expected the thing not to run. 00:34:18.160 --> 00:34:20.720 And, er, and it did. 00:34:23.760 --> 00:34:25.280 It's quite a beautiful thing. 00:34:25.320 --> 00:34:27.520 Chaps, I know you're up against it. 00:34:27.560 --> 00:34:28.960 Pressure is on. 00:34:29.000 --> 00:34:30.560 What a surprise. 00:34:30.600 --> 00:34:34.080 What are the highlights in there, cos I can see, obviously, the table is on its side. 00:34:34.120 --> 00:34:37.120 Yeah, well, what we decided to do with that was lots of little things. 00:34:37.160 --> 00:34:39.320 Ding, ding, ding, ding. That's going to be on there. 00:34:39.360 --> 00:34:41.720 And what's happening the other side of that module there? 00:34:41.760 --> 00:34:44.480 We decided to use helium because we quite like a balloon, 00:34:44.520 --> 00:34:47.720 so there's going to be a helium balloon appearing from somewhere 00:34:47.760 --> 00:34:51.160 and coming up to the doorway and releasing your sausages. 00:34:51.200 --> 00:34:54.320 Well, I wouldn't want my sausages released in any other way. 00:34:55.680 --> 00:34:58.960 They want Josh's car from the hallway to trigger a rat trap 00:34:59.000 --> 00:35:02.160 that starts Mike's extravagant dining table ball run 00:35:02.200 --> 00:35:03.640 that hits a mousetrap, 00:35:03.680 --> 00:35:06.520 releasing a spoon that's lifted by Baz's balloons 00:35:06.560 --> 00:35:08.040 to tension a string 00:35:08.080 --> 00:35:11.480 that releases the flying sausage dropper 00:35:11.520 --> 00:35:13.960 The only thing missing is an egg whisk. 00:35:19.400 --> 00:35:22.960 If ever Social Mediocrity needed to leave time for testing, 00:35:23.000 --> 00:35:24.440 it's now. 00:35:25.560 --> 00:35:26.840 Teams! 00:35:26.880 --> 00:35:29.120 You have four hours left. 00:35:29.160 --> 00:35:30.400 Four hours. 00:35:30.440 --> 00:35:31.760 Carry on. 00:35:33.040 --> 00:35:34.800 We haven't got a spoon. 00:35:34.840 --> 00:35:38.240 The Aviators are working so hard, their tea's gone cold. 00:35:39.680 --> 00:35:40.920 Oh, that's grim. 00:35:40.960 --> 00:35:43.840 And Paul's hoping to impress with his sausage flinger. 00:35:45.520 --> 00:35:47.600 Aha, look, what did they say? 00:35:47.640 --> 00:35:50.520 I could see it, I were watching the aerobatics of the sausage. 00:35:50.560 --> 00:35:53.960 You need a bit of flamboyant sausage flinging. 00:35:54.000 --> 00:35:55.840 Flamboyance aside, 00:35:55.880 --> 00:35:59.640 both teams have finished their sausage delivery rigs... 00:35:59.680 --> 00:36:03.360 This will come round... ..and are now rushing to include their egg whisks. 00:36:03.400 --> 00:36:05.280 I can put a trigger underneath. 00:36:05.320 --> 00:36:07.560 Just drop away and that'll pull it, 00:36:07.600 --> 00:36:09.720 set the firework off, starts the fire. 00:36:09.760 --> 00:36:12.480 Steve's using it to trigger Albert's firework... 00:36:12.520 --> 00:36:15.640 Can you do me a favour, Baz? Just put a * in here for me. 00:36:15.680 --> 00:36:18.960 ..while Mike's bodging it into his still unfinished 00:36:19.000 --> 00:36:21.600 dining table extravaganza. 00:36:21.640 --> 00:36:22.960 Same old story. 00:36:23.000 --> 00:36:24.720 Nearly, but not quite. 00:36:24.760 --> 00:36:28.720 Teams, you are headed for the moment of truth. 00:36:28.760 --> 00:36:31.080 One of you will be going to the final. 00:36:31.120 --> 00:36:32.360 One of you will be going home. 00:36:32.400 --> 00:36:34.280 You have one hour left, use it well. 00:36:34.320 --> 00:36:36.040 Carry on. Oh, dear, thanks. 00:36:37.520 --> 00:36:39.680 With the moment of truth approaching, 00:36:39.720 --> 00:36:41.720 Social Mediocrity are panicking. 00:36:43.560 --> 00:36:44.960 Jesus. 00:36:46.440 --> 00:36:48.080 But we've been here before. 00:36:48.120 --> 00:36:51.360 We've got the Aviators over there, they've finished. 00:36:51.400 --> 00:36:54.480 and we've got Social Mediocrity still building. 00:36:54.520 --> 00:36:56.000 Yeah, absolutely. 00:36:56.040 --> 00:36:58.080 The Aviators have tested. 00:36:58.120 --> 00:37:01.360 However, while I look at Social Mediocrity, Josh has been going back 00:37:01.400 --> 00:37:03.800 and testing each of the rooms all day long, 00:37:03.840 --> 00:37:06.200 while Baz and Mike have been building the final machine. 00:37:07.280 --> 00:37:10.400 While Social Mediocrity may look panicked... 00:37:10.440 --> 00:37:12.320 Really, really not good. No. 00:37:12.360 --> 00:37:14.280 ..have they stretched themselves more 00:37:14.320 --> 00:37:16.760 than the calm and collected Aviators? 00:37:18.400 --> 00:37:20.800 I almost don't want to do this, but I'm going to. 00:37:20.840 --> 00:37:22.320 Teams! 00:37:22.360 --> 00:37:25.560 One minute, you're into your final minute. 00:37:25.600 --> 00:37:28.360 Another sec. Just keep your hands there. 00:37:28.400 --> 00:37:31.200 Social Mediocrity are rushing to finish again. 00:37:31.240 --> 00:37:33.720 It's pretty busy. Don't touch anything else in there, Josh. 00:37:33.760 --> 00:37:35.160 If a fly lands, it's going off. 00:37:35.200 --> 00:37:37.680 As the pressure rises, confidence tends to go down. 00:37:37.720 --> 00:37:40.680 And while the Aviators are conducting pre-flight checks, 00:37:40.720 --> 00:37:43.360 they've never tested it as one machine. 00:37:46.120 --> 00:37:47.640 Ten... Umbrella. 00:37:47.680 --> 00:37:49.320 ..nine, eight... 00:37:49.360 --> 00:37:52.000 Does that stop it? ..seven, six, 00:37:52.040 --> 00:37:53.360 five... 00:37:53.400 --> 00:37:55.520 No! ..four, three... 00:37:55.560 --> 00:37:57.800 ..two, one. 00:37:57.840 --> 00:37:59.520 Time is up. 00:37:59.560 --> 00:38:01.040 Get your machine set. 00:38:01.080 --> 00:38:02.480 I don't like this game any more. 00:38:02.520 --> 00:38:04.600 And you will be judged. 00:38:04.640 --> 00:38:07.320 Oh! Has anything been tried? Er, no. 00:38:07.360 --> 00:38:10.000 So who will earn a place in the final? 00:38:14.920 --> 00:38:16.960 It's the moment we've been waiting for 00:38:17.000 --> 00:38:19.440 and my sausages have been dreading, 00:38:19.480 --> 00:38:22.440 because my semifinalists are hoping to show 00:38:22.480 --> 00:38:24.120 how their entire machines 00:38:24.160 --> 00:38:26.120 can set my bangers frying 00:38:26.160 --> 00:38:28.080 without me leaving my desk. 00:38:29.240 --> 00:38:31.080 If the whole thing works, 00:38:31.120 --> 00:38:33.680 it will be spectacular. 00:38:33.720 --> 00:38:35.400 It should work. 00:38:35.440 --> 00:38:37.800 I think I get a bit fatalistic at this stage. 00:38:37.840 --> 00:38:39.920 We've done our best. 00:38:39.960 --> 00:38:43.720 Judge Zach will decide which machine is best, 00:38:43.760 --> 00:38:46.360 based on its creativity and complexity 00:38:46.400 --> 00:38:50.360 and whether or not it needs human intervention once started. 00:38:50.400 --> 00:38:52.920 The Aviators are running their shot 00:38:52.960 --> 00:38:54.920 at reaching the final first. 00:38:54.960 --> 00:38:56.120 How are you feeling? 00:38:56.160 --> 00:38:57.920 Yeah, quietly confident. 00:38:57.960 --> 00:38:59.000 Good. 00:38:59.040 --> 00:39:00.880 Have you tested it? 00:39:00.920 --> 00:39:02.840 No, not in its entirety. 00:39:02.880 --> 00:39:04.760 Not even once. Not even once. 00:39:04.800 --> 00:39:07.320 They're flying by the seat of their pants, 00:39:07.360 --> 00:39:10.880 hoping Albert's gun topples cups that start a grinder, 00:39:10.920 --> 00:39:13.040 winding a string that tips a basket 00:39:13.080 --> 00:39:15.520 that drops balls onto the switch for a kettle 00:39:15.560 --> 00:39:17.240 that steams kitchen roll 00:39:17.280 --> 00:39:18.960 to drop a pot that shuts a fridge, 00:39:19.000 --> 00:39:21.520 turning the whisk that starts a firework 00:39:21.560 --> 00:39:22.880 and chain fountain, 00:39:22.920 --> 00:39:25.200 making a traffic cone knock a toy digger, 00:39:25.240 --> 00:39:27.520 sending my sausages into the pan. 00:39:27.560 --> 00:39:30.680 They'll only get this far, though, if they've made their first two 00:39:30.720 --> 00:39:32.200 rooms work perfectly. 00:39:33.240 --> 00:39:36.360 Zach, you're a fan of testing. What do you think? 00:39:36.400 --> 00:39:38.680 I think it needed to be tested more. 00:39:38.720 --> 00:39:41.120 But, I mean, it's definitely the longest machine 00:39:41.160 --> 00:39:42.560 that we've ever seen. 00:39:42.600 --> 00:39:45.040 And it's really beautiful and whimsical. 00:39:45.080 --> 00:39:46.600 So I have my fingers crossed, 00:39:46.640 --> 00:39:48.400 but I can't call it because I don't know. 00:39:48.440 --> 00:39:50.000 There is a lot to go wrong. 00:39:50.040 --> 00:39:54.400 In your own time, start your machine in its entirety for the first time. 00:39:54.440 --> 00:39:55.600 Good luck. 00:39:55.640 --> 00:39:57.360 Albert, take it away. 00:40:08.000 --> 00:40:10.720 So the tetherball is going to a nice, real nice time delay. 00:40:10.760 --> 00:40:13.760 It's so quick, bang, bang, bang, and then the right graceful moment. 00:40:15.480 --> 00:40:17.680 Nice flows going into the next room. 00:40:19.360 --> 00:40:21.240 Oh, train, train, train. 00:40:21.280 --> 00:40:23.160 The train... The train did not start. 00:40:23.200 --> 00:40:26.320 You can intervene, Albert, you can intervene and start the train. 00:40:26.360 --> 00:40:29.560 Manually releasing the train is the first of three interventions 00:40:29.600 --> 00:40:31.560 they can make under Zach's rules. 00:40:34.280 --> 00:40:37.520 So now the sewing machine is starting, yeah. 00:40:40.640 --> 00:40:42.920 That's worked. I love the umbrella. I love the umbrella. 00:40:42.960 --> 00:40:44.720 We're into the next room. Viscosity. 00:40:46.240 --> 00:40:47.640 Wow. 00:40:47.680 --> 00:40:49.480 OK, now the meat grinder is going. 00:40:49.520 --> 00:40:51.160 That's winding the string. 00:40:51.200 --> 00:40:52.760 It's going to drop the bucket. 00:40:56.080 --> 00:40:59.480 And so now that switched on the tea kettle. They call it a napkin bridge. 00:40:59.520 --> 00:41:02.320 Yeah, and it just will break that, allowing that bucket to fall. 00:41:03.600 --> 00:41:04.840 There it goes. 00:41:05.960 --> 00:41:07.360 Wow. 00:41:10.720 --> 00:41:12.440 You did it. You are there, you are there. 00:41:12.480 --> 00:41:14.680 You are there, one intervention. 00:41:16.600 --> 00:41:18.960 And a million transitions. 00:41:19.000 --> 00:41:21.720 This chaotic machine was packed with references 00:41:21.760 --> 00:41:23.840 to the hobby they all share, 00:41:23.880 --> 00:41:26.200 used fluid motion and the egg whisk, 00:41:26.240 --> 00:41:28.880 and safely delivered my sausages. 00:41:28.920 --> 00:41:31.840 The only fly in the ointment is the train set, 00:41:31.880 --> 00:41:33.760 which needed an intervention. 00:41:33.800 --> 00:41:36.400 I overheard them saying this is one of the rooms with the highest 00:41:36.440 --> 00:41:39.400 transitions in and I suppose more steps. 00:41:39.440 --> 00:41:42.440 I didn't realise because I thought we needed to put more stuff in it. 00:41:42.480 --> 00:41:46.120 Those guys built a phenomenal machine, the longest one they've ever seen. 00:41:46.160 --> 00:41:50.040 So can their rivals who were building until the dying seconds 00:41:50.080 --> 00:41:53.600 beat that and earn the remaining place in the final? 00:41:53.640 --> 00:41:55.240 Team Social Mediocrity, 00:41:55.280 --> 00:41:57.600 There's no point in my asking if you've tested it 00:41:57.640 --> 00:41:59.760 because you've only just finished building it. 00:41:59.800 --> 00:42:01.400 No, no, not tested. Not tested. 00:42:01.440 --> 00:42:04.560 They want Josh's hallway car to hit a rat trap, 00:42:04.600 --> 00:42:06.240 triggering the egg whisk 00:42:06.280 --> 00:42:10.240 that starts Mike's dining table bull run extravaganza, 00:42:10.280 --> 00:42:12.440 hitting a mouse trap to release balloons, 00:42:12.480 --> 00:42:14.040 which should rise up a string 00:42:14.080 --> 00:42:16.840 and send Baz's sausage dropper down a line 00:42:16.880 --> 00:42:19.760 to release its cargo into the pan. 00:42:19.800 --> 00:42:22.560 Josh spent all day checking the first two rooms, 00:42:22.600 --> 00:42:25.480 so will be desperate it works all the way through. 00:42:25.520 --> 00:42:28.120 Right, Zach, they were under pressure for time today 00:42:28.160 --> 00:42:29.600 but they got it finished. Yeah. 00:42:29.640 --> 00:42:32.360 I mean, they matched their style all throughout and, you know what, 00:42:32.400 --> 00:42:34.000 I know room one and two will work 00:42:34.040 --> 00:42:36.080 because, well, just tested it all day. 00:42:36.120 --> 00:42:38.280 No pressure. No pressure at all. 00:42:38.320 --> 00:42:40.800 Room three, ah, you know what, I'm out. 00:42:40.840 --> 00:42:42.520 They have great luck on their side as well. 00:42:42.560 --> 00:42:44.400 We all want to see it all work. 00:42:44.440 --> 00:42:48.680 In your own time, when you're ready, start your machine in its entirety. 00:42:48.720 --> 00:42:49.920 All right, our kid. 00:42:49.960 --> 00:42:51.520 Here we go. 00:42:51.560 --> 00:42:52.840 Go on, Tony. 00:42:52.880 --> 00:42:56.080 Lovely, slow start with Tony. 00:42:56.120 --> 00:42:57.480 There it goes. 00:43:01.640 --> 00:43:03.720 Oh, I though that hadn't lit, then! 00:43:04.800 --> 00:43:06.840 As long as it goes through it. 00:43:06.880 --> 00:43:09.400 I love all the time delays, just from the get go. 00:43:09.440 --> 00:43:11.000 And the fan.... 00:43:11.040 --> 00:43:13.400 So, all that's got to do is turn and we're into the next room? 00:43:13.440 --> 00:43:14.960 Mmm-hmm. Yep. 00:43:15.000 --> 00:43:17.840 Drops, hits the rocker. We're in! 00:43:17.880 --> 00:43:20.080 The bicycle is so classy. 00:43:22.960 --> 00:43:24.880 The Archimedes *, so now we wait. 00:43:24.920 --> 00:43:26.120 Oh, has it done it? 00:43:26.160 --> 00:43:27.720 It's done it, it's done it. 00:43:27.760 --> 00:43:30.240 Oh, my word. That was so much faster than yesterday. 00:43:30.280 --> 00:43:32.400 Yeah, go. Wait, it's going to go. 00:43:32.440 --> 00:43:33.680 It's going to go. 00:43:36.320 --> 00:43:37.320 Go on. 00:43:40.000 --> 00:43:41.200 You are through. 00:43:41.240 --> 00:43:42.240 I'm out! 00:43:44.680 --> 00:43:45.920 And... 00:43:45.960 --> 00:43:47.160 What's going on? 00:43:48.760 --> 00:43:51.120 Ugh, it's derailed. Oh, no! 00:43:51.160 --> 00:43:54.240 Gut-wrenching. The string didn't release the spoon handle. 00:43:54.280 --> 00:43:56.440 Intervention! You can intervene. 00:43:56.480 --> 00:43:59.840 So, Mike's made the first of the three interventions he's allowed. 00:44:03.720 --> 00:44:06.880 I've never seen this before, this is magical. Nobody's ever seen it! 00:44:06.920 --> 00:44:08.240 It's never been run! Aw! 00:44:08.280 --> 00:44:11.560 And intervention number two, the sausage dropper is stuck. 00:44:13.240 --> 00:44:15.160 Ah, he has to touch it again. Aw. 00:44:17.880 --> 00:44:20.120 Boom, sausages. Well done, team! 00:44:21.640 --> 00:44:24.120 The machine got off to a brilliant start, 00:44:24.160 --> 00:44:26.600 with fluid motion working perfectly. 00:44:26.640 --> 00:44:30.280 Then the simplest detail of Mike's dining-table extravaganza 00:44:30.320 --> 00:44:34.360 let them down. And Baz's floating balloons didn't quite have the force 00:44:34.400 --> 00:44:36.520 to release his sausage dropper, 00:44:36.560 --> 00:44:38.000 but what a spectacle. 00:44:38.040 --> 00:44:41.000 Many months ago, we met up to experiment for two hours to see 00:44:41.040 --> 00:44:44.960 if we even had any chance of doing this. From that moment to right now, 00:44:45.000 --> 00:44:48.680 I think it's... I would have never realised we could get to this point. 00:44:48.720 --> 00:44:52.600 Two great machines and only one spot in the final. 00:44:52.640 --> 00:44:54.640 Well, you just don't know, do you? 00:44:54.680 --> 00:44:57.440 It's down to Zach and all his wacky criteria 00:44:57.480 --> 00:44:59.480 about what he's looking for. 00:44:59.520 --> 00:45:02.640 I'd only just realised, when I watched the Aviators run the whole 00:45:02.680 --> 00:45:05.960 of their machine, how much of it was to do with flight. 00:45:06.000 --> 00:45:07.400 The umbrella that just lifted off, 00:45:07.440 --> 00:45:09.800 a bow and arrow flying through the air, a plane going down, 00:45:09.840 --> 00:45:11.600 a helicopter that took off. 00:45:11.640 --> 00:45:13.840 They were true to their name, they kept to a theme. 00:45:13.880 --> 00:45:16.280 I think they had a fantastic machine all throughout. 00:45:16.320 --> 00:45:19.000 But to be fair, also, on the other side, Social Mediocrity, 00:45:19.040 --> 00:45:21.760 great cartoon elements and that's what I want to see. 00:45:21.800 --> 00:45:24.440 Right, the ET bike. How fantastic is that? 00:45:24.480 --> 00:45:27.240 Slow, suspenseful. Beautiful. 00:45:27.280 --> 00:45:30.120 You've got to do your sums and do your thinking, do you have a winner? 00:45:30.160 --> 00:45:32.200 I do have a winner in mind this time. OK. 00:45:35.120 --> 00:45:37.880 Congratulations, both teams, for getting to the semifinal 00:45:37.920 --> 00:45:40.640 and for building exactly the kind of machines we want to see 00:45:40.680 --> 00:45:43.600 at this level. They're fun, creative, complex, 00:45:43.640 --> 00:45:46.400 chaotic and clever. 00:45:46.440 --> 00:45:50.640 Sadly, it will be only one team going forward to the finals. 00:45:50.680 --> 00:45:52.760 And that team is going to be... 00:45:56.480 --> 00:45:57.840 ..it's the Aviators. 00:45:57.880 --> 00:46:00.520 Well done! Well done, both teams. Congratulations. 00:46:02.200 --> 00:46:04.760 Feel proud of what we've done. We've done well, haven't we? 00:46:04.800 --> 00:46:06.818 They're good guys. 00:46:06.842 --> 00:46:07.677 I definitely don't feel cheated. No! 00:46:07.680 --> 00:46:10.080 Just delighted. The best team won, definitely. 00:46:10.120 --> 00:46:12.840 Next up for the Aviators is the final. 00:46:12.880 --> 00:46:15.480 Let's see what happens. I'm a bit more nervous than owt else, 00:46:15.520 --> 00:46:16.888 how about you? I'll have a beer. 00:46:16.912 --> 00:46:18.280 Beer would be good, yeah. 00:46:18.320 --> 00:46:21.440 I might go for a rum and coke, I've had a lot of tea. 00:46:21.480 --> 00:46:23.200 Next time, it is the final. 00:46:23.240 --> 00:46:24.880 Find the problem, solve the problem. 00:46:24.920 --> 00:46:27.120 Aviators versus Fieldhouse Brothers... 00:46:27.160 --> 00:46:28.840 If you're no set up in a minute, you're out! 00:46:28.880 --> 00:46:30.680 ..in an epic party-throwing showdown.