WEBVTT 00:00:00.300 --> 00:00:05.582 They say an Englishman's home is his castle, and this is mine! 00:00:05.607 --> 00:00:09.582 Some say it's a bit on the big side for one person, but... 00:00:09.607 --> 00:00:11.892 Well, it's somewhere to lay my head. 00:00:11.917 --> 00:00:14.972 Yes, I'm just a regular guy living in a standard gaff, 00:00:14.997 --> 00:00:17.302 leading an ordinary existence 00:00:17.327 --> 00:00:20.531 and struggling to answer all of life's big questions. 00:00:20.556 --> 00:00:24.222 Like... Why can't I feed the dog while relaxing in the garden? 00:00:24.247 --> 00:00:26.942 Is it possible for me to boil the kettle 00:00:26.967 --> 00:00:29.302 while I perform my morning ablutions? 00:00:29.327 --> 00:00:33.692 And why can't I cook my sausages while writing my memoirs? 00:00:33.717 --> 00:00:37.611 I'm sure there are neat, but dreary digital solutions available, 00:00:37.636 --> 00:00:39.541 but who wants to do this... 00:00:40.816 --> 00:00:42.541 ...when you can do this? 00:00:48.287 --> 00:00:50.072 It's just better. 00:00:50.097 --> 00:00:54.102 And we've reached the first semifinal of my knockout tournament. 00:00:54.127 --> 00:00:55.741 This already feels dangerous. 00:00:55.766 --> 00:00:58.052 Where teams of amateur engineers... 00:00:58.077 --> 00:01:01.972 Oh! ..will compete to perform my ordinary chores 00:01:01.997 --> 00:01:03.942 in extraordinary ways. 00:01:03.967 --> 00:01:05.582 Love it when a plan comes together. 00:01:05.607 --> 00:01:07.382 With chain-reaction machines... 00:01:09.407 --> 00:01:12.902 ...crazy contraptions made famous by viral videos 00:01:12.927 --> 00:01:16.902 that involve linking up everyday objects to magical effect. 00:01:19.177 --> 00:01:20.692 Boom! 00:01:20.717 --> 00:01:24.741 Chain—reaction guru Zach Umperovitch is the fearsome judge. 00:01:24.766 --> 00:01:27.052 That better work perfectly the first time. 00:01:27.077 --> 00:01:28.741 Oh! You stupid thing! 00:01:30.537 --> 00:01:34.052 Dr Shini Somara will reveal the science inside the machines. 00:01:36.007 --> 00:01:41.512 And very soon, one team will be crowned Chain—Reaction Champions. 00:01:49.047 --> 00:01:53.432 Over the years, I've built up quite a collection of fine bone china. 00:01:53.457 --> 00:01:56.182 As you can imagine, it takes some looking after. 00:01:56.207 --> 00:02:01.512 But on my bi-weekly duvet days, dusting is simply a chore too far. 00:02:01.537 --> 00:02:03.462 Which got me thinking. 00:02:03.487 --> 00:02:05.822 Could off-kilter engineering save the day 00:02:05.847 --> 00:02:08.421 and allow me to take care of my priceless collection 00:02:08.446 --> 00:02:10.062 without leaving my bed? 00:02:13.446 --> 00:02:18.102 My first dust—busting semifinalists are two bands of brothers. 00:02:18.127 --> 00:02:21.062 The Field houses from Somerset won their heat 00:02:21.087 --> 00:02:24.102 with an ingenious way for me to make my bed. 00:02:24.127 --> 00:02:25.421 Well done, team! 00:02:25.446 --> 00:02:28.592 We all want to get to the final, don't we? Yeah. We're going to do whatever we can. 00:02:28.617 --> 00:02:31.032 The Buenos, originally from Spain, 00:02:31.057 --> 00:02:34.621 triumphed with a terrifying plant-watering contraption. 00:02:36.617 --> 00:02:38.952 This is a competition, and we must win! 00:02:38.977 --> 00:02:41.312 Both are hoping to do their families proud, 00:02:41.337 --> 00:02:44.152 as they enter one of my many outbuildings. 00:02:44.177 --> 00:02:47.062 I may be eccentric, but I'm not completely mad. 00:02:47.087 --> 00:02:49.671 I'm not letting the teams in here. 00:02:49.696 --> 00:02:52.342 Instead, each set of siblings has a workshop 00:02:52.367 --> 00:02:54.902 packed with objects to use in their contraptions. 00:02:54.927 --> 00:02:56.182 Well, here we are. 00:02:56.207 --> 00:02:59.032 Look at her go! Oh, my God, it is Mama Duck! 00:03:00.537 --> 00:03:03.952 And three days to create machines that traverse my bedroom, 00:03:03.977 --> 00:03:05.702 hallway and lounge. 00:03:05.727 --> 00:03:07.782 I think we need to rearrange, don't we, a bit? 00:03:07.807 --> 00:03:11.421 We've got big ideas, so we've got to execute those and we've got to link them up, 00:03:11.446 --> 00:03:13.751 but most importantly, we've got to do it reliably. 00:03:15.646 --> 00:03:17.512 I'm pretty confident we're going to have fun. 00:03:17.537 --> 00:03:19.871 Yeah. Yeah. If nothing else. That's all we care about. 00:03:19.896 --> 00:03:22.232 WHIRRING Oh, for Pete's sake! 00:03:22.257 --> 00:03:26.082 The Bueno Brothers are already destroying my bedroom furniture. 00:03:26.107 --> 00:03:29.721 Enrique's ripping out my drawers to use them as dominoes, 00:03:29.746 --> 00:03:31.952 which is no surprise. 00:03:33.027 --> 00:03:36.442 Because they won their heat with a destructive, dynamic machine 00:03:36.467 --> 00:03:38.841 that was sometimes unreliable. 00:03:38.866 --> 00:03:40.521 It's stopped! 00:03:40.546 --> 00:03:43.442 Which could be why big brother javi's got doubts. 00:03:43.467 --> 00:03:46.162 I don't think doing dominoes with this is a good idea. 00:03:46.187 --> 00:03:48.112 No, it's fine, because you saw the bits inside. 00:03:48.137 --> 00:03:49.924 No... What...? No... What do you 00:03:49.948 --> 00:03:50.802 want to build with this? Anything. 00:03:50.827 --> 00:03:52.641 Starting well, then. 00:03:52.666 --> 00:03:55.922 ALARM WAILS Um... Ooh! It's going to slide. 00:03:55.947 --> 00:03:57.752 Ooh, that's the alarm that tells me 00:03:57.777 --> 00:04:00.752 another set of brothers are living up to their reputation. 00:04:00.777 --> 00:04:02.521 The vibration of the alarm 00:04:02.546 --> 00:04:05.721 allows it to overcome the coefficient of friction on the ramp. 00:04:05.746 --> 00:04:07.672 We've wired up a switch to it 00:04:07.697 --> 00:04:10.002 so that we can just turn it on whenever we like. 00:04:10.027 --> 00:04:13.162 This fiddly step is typical Adam. 00:04:14.587 --> 00:04:16.242 It worked. 00:04:16.267 --> 00:04:17.922 It's not meant to do that. 00:04:17.947 --> 00:04:19.851 He infuriated his brothers in the heat... 00:04:19.876 --> 00:04:22.162 Probably broken it all now. 00:04:22.187 --> 00:04:24.672 ...by obsessing over soap jumps... 00:04:24.697 --> 00:04:26.442 When do we give up on that, Adam? 00:04:26.467 --> 00:04:28.752 ...and collapsing train tracks... 00:04:28.777 --> 00:04:31.082 The ball rolls down and it nudges it. 00:04:31.107 --> 00:04:32.362 Oh, this might be a bit ambitious. 00:04:32.387 --> 00:04:34.242 Ooh! Come on! Come on, soap! Ooh! 00:04:34.267 --> 00:04:37.682 ...in the intricate and funny machine that won their heats. 00:04:37.707 --> 00:04:40.442 Still, he usually gets there in the end. 00:04:42.267 --> 00:04:43.882 Oh, my God! 00:04:43.907 --> 00:04:47.362 Don't let Adam run away with a complicated task for five hours' straight. 00:04:47.387 --> 00:04:51.292 My stats carried it through last time, so I'm going to go bigger, more ambitious. 00:04:51.317 --> 00:04:53.042 Have you seen the duck? 00:04:53.067 --> 00:04:57.002 I imagine the only thing these very different sets of siblings share... 00:04:58.777 --> 00:05:00.442 ...is patient parents. 00:05:01.876 --> 00:05:04.869 Hello! Morning, Bueno Brothers. 00:05:04.893 --> 00:05:05.882 How are we? Good. OK, yeah. 00:05:05.907 --> 00:05:08.802 Is there going to be a general theme we're going to see to your approach 00:05:08.827 --> 00:05:10.601 to really turning out something special? 00:05:10.626 --> 00:05:13.292 So we want to try and kind of broaden a little bit more, 00:05:13.317 --> 00:05:16.492 use more types of transitions, you know, like, it's all mechanical. 00:05:16.517 --> 00:05:19.082 We're mixing in a little bit of chemical, some electrical. 00:05:19.107 --> 00:05:22.932 Kind of more of the same, but at the same time, better, if that makes sense? 00:05:22.957 --> 00:05:25.442 More of the same, but better. 00:05:25.467 --> 00:05:29.851 Exciting to watch and terrifying for their rivals. 00:05:29.876 --> 00:05:32.212 Field house Brothers, hello! Hello. Hello. Hello. 00:05:32.237 --> 00:05:34.682 Are you feeling brilliant and creative? 00:05:34.707 --> 00:05:37.496 We're feeling nervous. Our family's 00:05:37.520 --> 00:05:38.442 reputation is completely on the line here. 00:05:38.467 --> 00:05:41.401 That's what it's come down to. It's fantastic. 00:05:41.426 --> 00:05:43.762 We've got two sets of brothers battling it out. 00:05:43.787 --> 00:05:47.162 One of the issues you had in the first round 00:05:47.187 --> 00:05:52.042 was a tendency to get distracted and fixated on one small thing. 00:05:52.067 --> 00:05:54.401 Mm. Mot looking at anybody, Adam. 00:05:54.426 --> 00:05:57.242 We've given him a time limit on everything Adam attempts this time round. 00:05:57.267 --> 00:06:00.452 So if it's more than one hour, he needs to ditch it and move on. 00:06:00.477 --> 00:06:03.292 Yeah, let's see how that goes. 00:06:04.626 --> 00:06:08.092 Their plan is to use Adam's alarm clock to trigger a ball 00:06:08.117 --> 00:06:09.842 that turns a rotor, 00:06:09.867 --> 00:06:11.882 tipping a jug of orange juice, 00:06:11.907 --> 00:06:14.172 releasing a ball from a cup 00:06:14.197 --> 00:06:16.092 that hits a Newton's cradle, 00:06:16.117 --> 00:06:20.452 flipping a book open, sending a ball across a train track seesaw, 00:06:20.477 --> 00:06:22.762 which, for now, leads nowhere. 00:06:22.787 --> 00:06:25.372 You've got half an hour left on that device 00:06:25.397 --> 00:06:28.452 before you've got to ditch it and move on. I need ten minutes. 00:06:28.477 --> 00:06:32.292 Teams, no-one likes to break bad news, 00:06:32.317 --> 00:06:33.962 but I'm afraid I'm going to have to. 00:06:33.987 --> 00:06:35.401 Two hours have gone! 00:06:35.426 --> 00:06:37.762 With time ticking, youngest Bueno Ruben 00:06:37.787 --> 00:06:40.292 is working on a spinning swimming pool noodle, 00:06:40.317 --> 00:06:42.601 which he wants to trigger with a dangerous thing 00:06:42.626 --> 00:06:44.932 that he's made more dangerous. 00:06:44.957 --> 00:06:47.762 So we were thinking about shooting an arrow, 00:06:47.787 --> 00:06:50.252 but we were like, "Why don't we just shoot the bow instead?" 00:06:50.277 --> 00:06:54.651 The plan is for a laundry-basket lid to release the bow, 00:06:54.676 --> 00:06:57.842 spinning the noodle, releasing a boot down a zip line, 00:06:57.867 --> 00:06:59.682 hitting some book dominoes, 00:06:59.707 --> 00:07:02.252 which release a football down some walking canes 00:07:02.277 --> 00:07:04.012 that trigger the drawer dominoes. 00:07:04.037 --> 00:07:06.372 And at the moment, it stops there. 00:07:06.397 --> 00:07:09.452 Yeah, I might need, like, an American football helmet or something. 00:07:12.477 --> 00:07:14.012 Three hours have gone. 00:07:14.037 --> 00:07:16.012 But how are we going to keep it straight? 00:07:16.037 --> 00:07:17.372 I'll build like a thing. 00:07:17.397 --> 00:07:19.452 Javi's trying some intricacy 00:07:19.477 --> 00:07:21.842 by triggering the dominoes with a gate latch, 00:07:21.867 --> 00:07:24.332 rather than just hitting them. 00:07:24.357 --> 00:07:26.611 So when we release that, this drops. 00:07:26.636 --> 00:07:28.531 Just make sure that that happens. 00:07:28.556 --> 00:07:32.122 With their builds progressing, the sibling rivalry is growing. 00:07:32.147 --> 00:07:34.092 Your guys' is looking real intricate. 00:07:34.117 --> 00:07:37.401 Yeah. You look like you've gone large over there. It looks good. 00:07:37.426 --> 00:07:39.052 Go big or go home, eh? 00:07:39.077 --> 00:07:41.372 Well, exactly. We might be the ones going home... 00:07:42.477 --> 00:07:44.252 We've gone technical. It's interesting. 00:07:44.277 --> 00:07:46.052 Yeah. We've gone... It's clever. 00:07:46.077 --> 00:07:47.812 Intricate or big? 00:07:47.837 --> 00:07:50.611 Yeah, that's for the judges to decide. Yeah, that's true. 00:07:50.636 --> 00:07:53.842 Javi's attempt at intricacy isn't going well. 00:07:53.867 --> 00:07:57.172 Tie a bunch of weight to that, er...thing. 00:07:57.197 --> 00:07:58.972 Now we tie those to the thing. 00:07:58.997 --> 00:08:01.302 And the Field houses could be edging ahead. 00:08:01.327 --> 00:08:03.332 It sounds like they're a bit scared. 00:08:03.357 --> 00:08:06.842 Adam says he's now apparently officially 00:08:06.867 --> 00:08:08.616 finished the orange juice squeaker. 00:08:08.640 --> 00:08:09.482 So reliable. Yeah. 00:08:09.506 --> 00:08:12.481 Um...| don't trust him at all, but apparently he's done it. 00:08:12.506 --> 00:08:14.842 So he's now moved on to ping—pong ball. 00:08:14.867 --> 00:08:19.531 The ping-pong in question will float above a hairdryer on a toy car 00:08:19.556 --> 00:08:22.022 that's pulled along by a teddy bear counterweight, 00:08:22.047 --> 00:08:25.092 until it hits a stool and drops the ball, 00:08:25.117 --> 00:08:28.562 which triggers a toy train to leave the room. 00:08:28.587 --> 00:08:30.892 Oh! It just gets stopped. 00:08:30.917 --> 00:08:35.302 Perfecting these delicate steps in less than two hours will be tough. 00:08:35.327 --> 00:08:37.132 Hey, what happened there? It fell off! 00:08:38.197 --> 00:08:39.942 Ooh! That's a new one! 00:08:39.967 --> 00:08:43.972 As will making a skateboard ride on a dresser. 00:08:43.997 --> 00:08:45.661 Thank God you were there. 00:08:45.686 --> 00:08:48.772 Enrique wants the dresser dominoes to yank a string 00:08:48.797 --> 00:08:52.741 that slams a toilet seat, sending the skateboard into some spoons 00:08:52.766 --> 00:08:55.611 that bat a ball down a pipe on to the landing. 00:08:58.636 --> 00:09:01.411 Here you go! It's looking good. 00:09:02.877 --> 00:09:05.462 But javi's given up on his fiddly latch 00:09:05.487 --> 00:09:10.462 and is creating a far more Bueno and totally bonkers plan B. 00:09:11.797 --> 00:09:14.741 This has two options. It can either go sideways and it hits something, 00:09:14.766 --> 00:09:17.052 or, I actually kind of discovered sort of by accident, 00:09:17.077 --> 00:09:18.942 it tilts heavily. So... 00:09:18.967 --> 00:09:20.609 Just sort it out. 00:09:20.633 --> 00:09:21.672 Yeah, I'm on it. Good. 00:09:21.997 --> 00:09:24.302 But instead of being on it, just put it there. 00:09:24.327 --> 00:09:26.052 The poor thing. 00:09:26.077 --> 00:09:29.212 With the pressure showing, the last thing the teams need 00:09:29.237 --> 00:09:31.491 are any distractions. 00:09:31.516 --> 00:09:33.182 Field house Brothers? Yes? Yes? 00:09:33.207 --> 00:09:35.611 Can one of you come over here? Er...yeah, I can. 00:09:35.636 --> 00:09:37.972 Come on, Adam. Come on, come on, come on, come on! Ah! 00:09:37.997 --> 00:09:40.661 It's the semifinal. Yeah. You're in it. Exciting! I know. 00:09:40.686 --> 00:09:44.621 Confidence level for winning it, one to ten, where are you? 00:09:44.646 --> 00:09:46.237 I don't know. The other team seem pretty 00:09:46.261 --> 00:09:47.852 good... They are. ..pretty switched on. 00:09:47.877 --> 00:09:50.302 We're about to run our thing as a full thing. 00:09:50.327 --> 00:09:52.212 Because everything's worked at least once, 00:09:52.237 --> 00:09:53.902 we just need to join it all together now. 00:09:53.927 --> 00:09:55.491 Ooh, let's have a look then. 00:10:03.877 --> 00:10:04.982 Go on! 00:10:06.436 --> 00:10:08.692 No. The ping-pong hasn't dropped. 00:10:08.717 --> 00:10:11.132 This could be a lifeline for Javi. 00:10:11.157 --> 00:10:14.212 Right! Now, um...this is the semifinal. 00:10:14.237 --> 00:10:16.772 Are you happy with your scale of ambition, 00:10:16.797 --> 00:10:19.132 with your creativity, with all the key elements? 00:10:19.157 --> 00:10:22.212 Er...if I'm perfectly honest, not...not quite. 00:10:22.237 --> 00:10:23.199 Why not? We had some ideas as to 00:10:23.223 --> 00:10:26.132 what we were going to sort of do 00:10:26.157 --> 00:10:29.102 and then we came in here and then we started doing things, 00:10:29.127 --> 00:10:31.621 and then we've had a few plans not quite pan out. 00:10:31.646 --> 00:10:34.661 I think we were kind of, sort of hoping for something slightly better 00:10:34.686 --> 00:10:37.741 and we're kind of sort of having to settle for the next—best thing. 00:10:37.766 --> 00:10:40.102 This is not the time to be settling for next best. No. 00:10:40.127 --> 00:10:42.342 This is the semifinals. Yeah. 00:10:43.597 --> 00:10:47.982 But with half an hour left, the Buenos' machine is coming together. 00:10:48.007 --> 00:10:50.342 OK, let's try that one more time. Tried a few times. 00:10:50.367 --> 00:10:52.741 And javi's finally looking on the bright side. 00:10:52.766 --> 00:10:55.102 The thing is, we've been taking extra time 00:10:55.127 --> 00:10:57.421 to make sure that every step is very reliable at every step, 00:10:57.446 --> 00:10:58.982 which has taken up more time. 00:10:59.007 --> 00:11:00.902 To be fair, we've tested separately. Yeah. 00:11:00.927 --> 00:11:02.782 So on the one hand, we're kind of panicking, 00:11:02.807 --> 00:11:05.741 cos, like, we have less time to test, but it's because 00:11:05.766 --> 00:11:10.102 we've spent more time making sure we need to test less later, so... 00:11:10.127 --> 00:11:11.702 I'm not sure if that made any sense. 00:11:11.727 --> 00:11:14.462 The poor guy's totally frazzled. Go, go, go. 00:11:19.696 --> 00:11:22.032 OK, so that works. 00:11:22.057 --> 00:11:26.501 Zach, time left for them now is measured in minutes rather than hours. 00:11:26.526 --> 00:11:29.621 Field house, there's a lot of points on it where I've seen it go wrong. 00:11:29.646 --> 00:11:32.032 Like, "Oh, this is the first time it's gone wrong!" 00:11:32.057 --> 00:11:35.782 And with minutes left, you know, will they get a perfect run yet? I don't know. 00:11:35.807 --> 00:11:39.112 Meanwhile, over here, the Bueno Brothers, 00:11:39.137 --> 00:11:41.472 things couldn't be more different, the two builds. 00:11:41.497 --> 00:11:43.902 They're building to the last minute. There's no full test run. 00:11:43.927 --> 00:11:46.621 It does have that cartoon quality. It does. 00:11:46.646 --> 00:11:48.902 Go. just do it. Go now. 00:11:48.927 --> 00:11:51.421 Five minutes to go... 00:11:51.446 --> 00:11:53.515 OK. No, no, no, no, it's my bad. 00:11:53.639 --> 00:11:54.621 Oh! Adam! No! 00:11:54.646 --> 00:11:57.032 ...and the Field house catastrophe. 00:11:57.057 --> 00:12:00.501 Adam was walking past and he kicked this, and it broke the switch. 00:12:00.526 --> 00:12:02.222 Completely snapped all of this up. 00:12:02.247 --> 00:12:05.902 It's all hands on deck to replace the broken hairdryer switch. 00:12:05.927 --> 00:12:07.621 It's completely broken inside. 00:12:07.646 --> 00:12:09.142 It doesn't work at all. 00:12:09.167 --> 00:12:12.301 Bro, don't tell me that. You're a liability, man! 00:12:12.326 --> 00:12:14.229 Other end. Put it where 00:12:14.253 --> 00:12:15.112 it's going to go. It's fine! 00:12:15.137 --> 00:12:16.942 I'll glue it on, then. 00:12:16.967 --> 00:12:20.551 Teams, you have 30 seconds left! 00:12:20.576 --> 00:12:23.942 Or you did have when I started making this announcement. It's gone down now. 00:12:23.967 --> 00:12:26.501 Come on, come on, come on! One test. Go. No, no. Go. 00:12:26.526 --> 00:12:29.392 Balance it on like that. Ten, nine... 00:12:30.776 --> 00:12:32.421 ...seven, six... 00:12:32.446 --> 00:12:35.501 Come on, come on, come on, come on, come on! ..five, four, three... 00:12:35.526 --> 00:12:38.832 Come on! ..two, one, zero! 00:12:38.857 --> 00:12:42.392 Time's up. Tools down, get set. Do the best you can. 00:12:42.417 --> 00:12:44.662 Remember, this is a test run, 00:12:44.687 --> 00:12:46.222 but we want it to work. 00:12:46.247 --> 00:12:49.192 Might work. Might work. Probably not. Small chance. 00:12:49.217 --> 00:12:52.301 Testing first are the Bueno Brothers. 00:12:52.326 --> 00:12:56.702 Have you done enough? Is that stage one of a semifinal-worthy machine? 00:12:56.727 --> 00:12:59.832 I'll be honest, probably not, but we've done our best. 00:12:59.857 --> 00:13:03.392 They're hoping a laundry basket triggers Ruben's bow, 00:13:03.417 --> 00:13:05.702 releasing a spinning pool noodle, 00:13:05.727 --> 00:13:08.942 sending a boot into javi's book, then drawer dominoes, 00:13:08.967 --> 00:13:12.862 sending a ball down Enrique's dresser, on to my landing. 00:13:14.087 --> 00:13:16.712 You've worked hard. There's the fruits of your lab our. 00:13:16.737 --> 00:13:18.992 Now show us if it works, in your own time. 00:13:25.417 --> 00:13:26.782 Whoa-ho! 00:13:29.446 --> 00:13:31.431 Oh! Wow! That was... 00:13:31.456 --> 00:13:33.392 APPLAUSE That was straight! 00:13:33.417 --> 00:13:35.712 It's quite quick, isn't it? 00:13:35.737 --> 00:13:38.352 He also got hit in the face with a bow, I couldn't help but notice. 00:13:39.857 --> 00:13:42.192 The bow, like, projectiled itself downwards, 00:13:42.217 --> 00:13:44.072 kind of smacked me in the face, but it's fine! 00:13:44.097 --> 00:13:45.406 It was a little bonus. 00:13:45.530 --> 00:13:46.292 Yeah, a little bonus. Yeah. 00:13:46.417 --> 00:13:49.192 A little bonus? Bow-nus? 00:13:50.297 --> 00:13:53.192 Yeah, I'll do the bad puns, thanks, Enrique. 00:13:53.217 --> 00:13:56.992 Anyway, nearly injuring Ruben must be a peak Bueno moment. 00:13:57.017 --> 00:13:59.431 And the machine just kept on punching. 00:13:59.456 --> 00:14:03.862 Complete with some intricacy in Enrique's neatly-rigged dresser. 00:14:03.887 --> 00:14:06.792 What we were left with was actually quite, you know, good, 00:14:06.817 --> 00:14:09.152 so we were fairly sure that it was going to run. 00:14:09.177 --> 00:14:11.912 They're a very high calibre of competition for us. 00:14:11.937 --> 00:14:14.222 So, can the fiddly Field house family 00:14:14.247 --> 00:14:17.511 reply with their own perfect test run? 00:14:17.536 --> 00:14:19.912 There are some risky bits in there. Mm-hm. Yeah. 00:14:19.937 --> 00:14:23.381 And it turns out there was another risk charging around in your machine, as well. 00:14:23.406 --> 00:14:25.712 Yeah. So Adam decided, with five minutes to go, 00:14:25.737 --> 00:14:27.712 to stamp all over our machine 00:14:27.737 --> 00:14:31.022 and brake our light switch and bend some tracks. 00:14:31.047 --> 00:14:32.832 So we had to fix it with five minutes to go. 00:14:32.857 --> 00:14:35.352 Right. So, you don't know if it's going to work? No. 00:14:35.377 --> 00:14:38.712 They're hoping Adam's remotely—triggered alarm clock 00:14:38.737 --> 00:14:41.022 starts his jug tip and ball run, 00:14:41.047 --> 00:14:43.482 triggering Damien's spring-loaded book, 00:14:43.507 --> 00:14:45.992 sending a ball across Robin's train track, 00:14:46.017 --> 00:14:48.352 over the repaired switch for a hairdryer, 00:14:48.377 --> 00:14:51.842 that floats a ball that triggers a train into the next room. 00:14:53.147 --> 00:14:55.431 Good luck. In your own time, start your machine. 00:15:04.507 --> 00:15:06.232 It really is quite a cute machine. 00:15:16.507 --> 00:15:18.152 Just look at all the risk in there! 00:15:22.307 --> 00:15:26.122 Almost every step has an element of risk. This is fantastic! 00:15:26.147 --> 00:15:28.592 The train's going. 00:15:29.977 --> 00:15:31.352 Chaps, well done! 00:15:31.377 --> 00:15:33.311 APPLAUSE Really well done! 00:15:33.336 --> 00:15:36.232 That was pretty special. 00:15:36.257 --> 00:15:39.122 We had to pull that out of the bag today. We got away with it. 00:15:39.147 --> 00:15:41.511 The Field houses outdid themselves, 00:15:41.536 --> 00:15:45.922 with alarm clock and hairdryer release millimetre perfect, 00:15:45.947 --> 00:15:49.482 and the train wending its way on to my landing. 00:15:49.507 --> 00:15:52.482 I really like the stark contrast 00:15:52.507 --> 00:15:54.842 between our machine and their machine. Yeah, yeah. 00:15:54.867 --> 00:15:57.232 We've...we've...we've gone like this. 00:15:57.257 --> 00:16:00.842 Obviously, we're going to be really biased now and say obviously, the intricacies are better. 00:16:00.867 --> 00:16:02.561 It's up to Zach at the end of the day, so... 00:16:02.586 --> 00:16:04.282 Yeah. ..we'll see what he decides. 00:16:04.307 --> 00:16:06.521 As day one ends, let's hope 00:16:06.545 --> 00:16:08.641 this family feud stays civil 00:16:08.666 --> 00:16:10.202 when it kicks off tomorrow. 00:16:16.797 --> 00:16:21.422 I love nothing more than reading Victorian slang dictionaries in bed. 00:16:21.447 --> 00:16:24.672 Grog blossoms — pimples on the face. 00:16:26.137 --> 00:16:29.341 But that can compromise my vital dusting work. 00:16:30.697 --> 00:16:33.952 Happily, my semifinalists have started creating machines 00:16:33.977 --> 00:16:36.672 that should let me do both things at once. 00:16:36.697 --> 00:16:39.141 And after perfect test runs yesterday... 00:16:39.166 --> 00:16:41.752 Wow! That was straight! Really well done. Get in! 00:16:41.777 --> 00:16:44.872 ...they'll be desperate to outdo each other today. 00:16:44.897 --> 00:16:47.672 Morning, teams. That was a great first day. 00:16:47.697 --> 00:16:50.422 Two perfect runs from two very different machines. 00:16:50.447 --> 00:16:55.192 One small and intricate, the other so brutal and violent, 00:16:55.217 --> 00:16:57.521 it actually assaulted a team member. 00:16:57.546 --> 00:17:00.271 But we start afresh today as you build across the landing. 00:17:00.296 --> 00:17:03.521 I would like you to incorporate a specific scientific principle 00:17:03.546 --> 00:17:05.422 in today's phase of your build, 00:17:05.447 --> 00:17:08.391 and that principle is Newton's law of gravity. 00:17:08.416 --> 00:17:11.341 You've got ten hours, teams. Get building! 00:17:12.496 --> 00:17:14.062 Gravity schmavity. 00:17:14.087 --> 00:17:16.521 Anything with a mass has a gravitational pull. 00:17:16.546 --> 00:17:18.312 And it just so happens the Earth is massive, 00:17:18.337 --> 00:17:20.141 so it has a significant gravitational pull. 00:17:20.166 --> 00:17:22.141 It's pretty obvious something's going to fall. 00:17:22.166 --> 00:17:23.712 We want to drop something kind of big. 00:17:23.737 --> 00:17:26.391 Nice, sort of... You know, slowly, but we want to drop something. 00:17:26.416 --> 00:17:29.552 And then, once that drops, we want to have a, um... 00:17:29.577 --> 00:17:31.962 Essentially, like, er... 00:17:31.987 --> 00:17:34.391 The main idea is to drop things and make things go up and down. 00:17:34.416 --> 00:17:38.271 Both rivals are going for a classic drop-something-heavy approach, 00:17:38.296 --> 00:17:40.351 but are they missing something? 00:17:40.376 --> 00:17:42.962 Here's Shini Somara with a look at some of the ups, 00:17:42.987 --> 00:17:47.521 and perhaps more importantly, the downs, of this scientific staple. 00:17:54.347 --> 00:17:56.682 I'm at the National Physical Laboratory, 00:17:56.707 --> 00:17:59.712 and this is a descendant of the very tree that's said 00:17:59.737 --> 00:18:04.471 to have inspired Sir Isaac Newton to formulate the theory of gravity. 00:18:04.496 --> 00:18:07.632 Legend has it that just over 300 years ago, 00:18:07.657 --> 00:18:12.792 a falling apple made him question why things fall downwards, 00:18:12.817 --> 00:18:15.912 instead of sideways, or even upwards. 00:18:15.937 --> 00:18:18.762 What few people know is that all objects with mass 00:18:18.787 --> 00:18:20.832 exert a gravitational pull. 00:18:20.857 --> 00:18:23.632 And that's what this set-up is all about. 00:18:23.657 --> 00:18:28.322 We've got an aluminium bar with tungsten carbide on each end, 00:18:28.347 --> 00:18:32.271 and it's oscillating slightly because of air currents in the room 00:18:32.296 --> 00:18:34.632 and tension in the nylon thread. 00:18:34.657 --> 00:18:39.122 But when I move this extremely heavy 00:18:39.147 --> 00:18:42.481 set of lead weights into position, 00:18:42.506 --> 00:18:45.042 what you see in the demo speeded up 00:18:45.067 --> 00:18:48.792 is the tungsten being attracted to the lead weights 00:18:48.817 --> 00:18:53.962 because of the gravitational pull exerted from the lead's mass. 00:18:53.987 --> 00:18:58.351 Guys? Proof of concept is not representative of the final product, but... 00:18:58.376 --> 00:19:00.682 javi's in charge of gravity. 00:19:00.707 --> 00:19:03.242 Perhaps he's embracing the gravitational attraction 00:19:03.267 --> 00:19:07.552 between lightweight tungsten carbide and a heavy lead weight. 00:19:09.267 --> 00:19:12.122 Well, you get the idea. I really don't. I actually don't. 00:19:12.147 --> 00:19:13.992 That is terrible. No. No. 00:19:14.017 --> 00:19:17.122 He's smashing some wood in a basket with an old wheel. 00:19:17.147 --> 00:19:20.992 In the end, he plans to drop a weight on to a seesaw 00:19:21.017 --> 00:19:24.271 made from a chopped-up dresser that'll make a big duck fly, 00:19:24.296 --> 00:19:26.151 and then, thanks to gravity, 00:19:26.176 --> 00:19:28.122 fall back down in the next room. 00:19:28.147 --> 00:19:29.762 Classic Bueno. 00:19:33.017 --> 00:19:34.842 Ooh! Back flip! 00:19:34.867 --> 00:19:36.632 Javi's back in his comfort zone. 00:19:36.657 --> 00:19:39.432 Pew—pew! Pew—pew! And seems happier than yesterday. 00:19:39.457 --> 00:19:41.322 He's a child, he is. 00:19:41.347 --> 00:19:43.842 And I don't want him to be any other way. 00:19:43.867 --> 00:19:45.151 Ooh, careful! 00:19:45.176 --> 00:19:48.122 The apple is going to be triggered, it's going to be released from the tree. 00:19:48.147 --> 00:19:49.992 The apple's going to fall down. 00:19:50.017 --> 00:19:52.842 The award for Most Literal Use of Gravity 00:19:52.867 --> 00:19:55.231 goes to the Field house Brothers. 00:19:55.256 --> 00:19:58.322 This, here, although it looks like a bucket, 00:19:58.347 --> 00:20:00.072 is actually Isaac Newton. 00:20:00.097 --> 00:20:02.712 The apple will fall on to Isaac Newton 00:20:02.737 --> 00:20:04.682 sitting in an upside-down umbrella, 00:20:04.707 --> 00:20:07.762 which will collapse and trigger a chain fountain, 00:20:07.787 --> 00:20:10.792 sending a bike wheel rotating around a pivot. 00:20:10.817 --> 00:20:13.281 Why have you got a wheel in your hand?! This is going to be... 00:20:14.587 --> 00:20:18.611 ...the more important scientific principle of gyroscopic precession. 00:20:18.636 --> 00:20:20.922 That's right, physics buffs, 00:20:20.947 --> 00:20:23.322 the phenomenon where the forces of a spinning thing 00:20:23.347 --> 00:20:25.762 make it move from side to side. 00:20:25.787 --> 00:20:28.072 OK, so that comes out... CLANG! 00:20:28.097 --> 00:20:30.401 When that bit works, sort of... 00:20:30.426 --> 00:20:32.682 That's a backup gravity option. Carry on. 00:20:33.897 --> 00:20:35.842 I can confirm the axe is sharp. 00:20:37.867 --> 00:20:41.611 There you go. Teams? Two hours have gone by. 00:20:41.636 --> 00:20:45.332 After matching each other with perfect tests yesterday... 00:20:45.357 --> 00:20:47.002 We're getting there, aren't we? 00:20:47.027 --> 00:20:50.872 ...the rivals now seem to be playing each other at their own games to get ahead. 00:20:50.897 --> 00:20:52.562 Pull again. 00:20:52.587 --> 00:20:55.872 And Damien's creating a dramatic Bueno-esque crossbow 00:20:55.897 --> 00:20:58.401 made from a guitar. 00:20:58.426 --> 00:21:01.361 We've...we've got bit intimidated 00:21:01.386 --> 00:21:05.082 and we're...we're having to go large because of them. 00:21:12.107 --> 00:21:13.231 It's looking good. 00:21:13.256 --> 00:21:14.642 Nice! P0w— pow— pow— pow— pow! 00:21:14.667 --> 00:21:16.082 Oh, my God! 00:21:16.107 --> 00:21:17.522 But get your PPE ready, 00:21:17.547 --> 00:21:20.611 because Ruben's working on a clever, so-called 00:21:20.636 --> 00:21:23.082 elephant's toothpaste chemical reaction. 00:21:23.107 --> 00:21:24.611 I know. 00:21:24.636 --> 00:21:27.972 I was expecting a big kaboom. I was expecting a big kaboom, as well. 00:21:27.997 --> 00:21:30.411 OK, so, how do we get it to make a bigger kaboom? 00:21:30.436 --> 00:21:34.411 Their new plan is to start with Enrique's football, 00:21:34.436 --> 00:21:37.202 that tips a cocktail shaker that fills a cup, 00:21:37.227 --> 00:21:39.522 causing a pulley to tip a bar stool, 00:21:39.547 --> 00:21:42.361 pulling a string that tips a jug to mix the chemicals, 00:21:42.386 --> 00:21:45.692 that overflow from a traffic cone, releasing pool * 00:21:45.717 --> 00:21:48.522 that drop a bucket that starts another pulley, 00:21:48.547 --> 00:21:52.882 finally triggering javi's gravity stage. Phew! 00:21:54.227 --> 00:21:55.922 That's not a lot that you're putting in. 00:21:55.947 --> 00:21:56.787 Of this? Yeah. I know, but it 00:21:56.974 --> 00:21:58.474 doesn't actually need that much. 00:21:58.547 --> 00:22:02.882 When hydrogen peroxide mixes with potassium iodide... 00:22:02.907 --> 00:22:04.212 Oh, there it is! 00:22:04.237 --> 00:22:06.562 ...the elephant's toothpaste is created, 00:22:06.587 --> 00:22:09.902 which should release two pool * as it soaks through the tissue. 00:22:09.927 --> 00:22:12.212 Ah! It just looks like one giant zit now. 00:22:13.516 --> 00:22:17.161 Ruben is using tape to stop his * dropping too soon. 00:22:20.467 --> 00:22:23.082 You know what the best part is? That it's probably very reliable. 00:22:23.107 --> 00:22:25.522 But nervous Javi can't help but interfere. 00:22:25.547 --> 00:22:28.161 Maybe don't use paper. There's no... It does not... 00:22:28.186 --> 00:22:29.932 So instead... Maybe just put, like... 00:22:29.957 --> 00:22:33.291 just take duct tape and put it like this and, like, suspend the ball. 00:22:33.316 --> 00:22:36.212 Javi? Those papers... No, no, no, no. 00:22:36.237 --> 00:22:38.802 Let him...let him do his process and you do yours. 00:22:38.827 --> 00:22:41.132 I am, but, like... No. No, you're not. 00:22:41.157 --> 00:22:42.602 You're micromanaging. 00:22:42.627 --> 00:22:45.722 Now, the moral here? Don't mess with your brother's *. 00:22:47.077 --> 00:22:49.082 Bueno Brothers, hello. Hello. 00:22:49.107 --> 00:22:51.522 It looks like you're all working on separate modules 00:22:51.547 --> 00:22:53.212 full of lovely transitions. Are you? 00:22:53.237 --> 00:22:55.161 Yeah, that's exactly it, yeah. That's the plan. 00:22:55.186 --> 00:22:57.491 You are going to need to connect them together. Yes. 00:22:57.516 --> 00:22:59.291 Have you worked that out? 00:22:59.316 --> 00:23:00.572 Pretty much. 50/50. 00:23:01.797 --> 00:23:03.722 Less than two hours remaining, 00:23:03.747 --> 00:23:06.052 and the pressure's getting to Damien, too. 00:23:06.077 --> 00:23:07.052 There are some lines there. 00:23:07.077 --> 00:23:09.442 There are some lines to your right a little bit, there. 00:23:09.467 --> 00:23:11.212 There?! Yeah. There?! 00:23:11.237 --> 00:23:15.052 He's struggling to steer a toy car toward the guitar crossbow. 00:23:15.077 --> 00:23:16.692 It's going to hit the mallet. 00:23:16.717 --> 00:23:18.732 That's way off, Damien. Why did you put it there? 00:23:18.757 --> 00:23:20.241 It... 00:23:20.266 --> 00:23:21.692 Why did you put it there? 00:23:21.717 --> 00:23:25.132 Once it's aimed correctly, the car should hit a lever, 00:23:25.157 --> 00:23:27.652 releasing Damien's guitar crossbow, 00:23:27.677 --> 00:23:30.132 which hits a trouser press that will slowly open, 00:23:30.157 --> 00:23:34.212 pulling a string that triggers Adam's Newton's apple umbrella, 00:23:34.237 --> 00:23:37.161 blazer, chain fountain and bike wheel, 00:23:37.186 --> 00:23:38.802 that breaks a web of rulers, 00:23:38.827 --> 00:23:41.212 opening Robin's record player cabinet doors, 00:23:41.237 --> 00:23:43.732 that knock a plant into the next room. 00:23:43.757 --> 00:23:45.132 WQW! 00:23:45.157 --> 00:23:48.291 You seem to have scaled up a bit today. Oh, yeah. We've gone big. 00:23:48.316 --> 00:23:50.652 Is that taking you out of your comfort zone a little bit? 00:23:50.677 --> 00:23:53.291 We've kept the technicality, but I think we've gone big, as well. 00:23:53.316 --> 00:23:54.799 You've been working on that. Yeah. 00:23:54.823 --> 00:23:55.772 Has he done anything else? 00:23:55.797 --> 00:23:57.732 I spent ten minutes... Not much. Not really. No. 00:23:57.757 --> 00:23:59.092 My bits...my bits work. 00:23:59.117 --> 00:24:00.962 My bits work, as well. And my bits work. 00:24:00.987 --> 00:24:02.522 Team, um...crack on. 00:24:02.547 --> 00:24:04.452 Half an hour left. 00:24:04.477 --> 00:24:07.212 This could go either way. 00:24:07.237 --> 00:24:10.732 Zach, I'd say the Bueno Brothers are now each taking a module and focusing on that. 00:24:10.757 --> 00:24:13.421 Absolutely. I'm super impressed with what they've done. 00:24:13.446 --> 00:24:15.322 I really love the bigger steps. 00:24:15.347 --> 00:24:18.732 I think one of the biggest issues with them is I think they're starting to panic 00:24:18.757 --> 00:24:22.062 and getting hung up on some minor details, and it's slowing them down. 00:24:22.087 --> 00:24:23.358 Yeah, but I like a bit of 00:24:23.382 --> 00:24:24.652 last-minute panic. I know you do. 00:24:24.677 --> 00:24:27.171 They've built a stylish, fun machine. It looks crazy. 00:24:27.196 --> 00:24:29.062 It really does, and I really love it. 00:24:29.087 --> 00:24:31.732 But over here, the Field house boys... Oh! 00:24:31.757 --> 00:24:35.602 ...they've got, once again, a very different atmosphere going on. 00:24:35.627 --> 00:24:38.932 It is a completely different atmosphere. 00:24:38.957 --> 00:24:40.572 They are methodic. 00:24:40.597 --> 00:24:42.932 Look at them! They're solving a problem together. 00:24:42.957 --> 00:24:45.732 These guys are a very strong team. They are a strong team. 00:24:45.757 --> 00:24:50.212 There's still something I love about the chaotic approach of these guys. 00:24:50.237 --> 00:24:51.682 I want to see that work. 00:24:53.807 --> 00:24:56.732 It's going without the ball, but I guess it's just the angle... 00:24:56.757 --> 00:24:59.012 No, it's good, it's good. We're OK now. 00:25:00.887 --> 00:25:03.332 Everything happened, apart from the blazer not falling off. 00:25:03.357 --> 00:25:07.142 Teams? 15 minutes. Drill. Go, go, go, go! 00:25:07.167 --> 00:25:09.501 15 minutes until I want you to get set for a test run 00:25:09.526 --> 00:25:11.732 of stage two of your machines. 00:25:13.607 --> 00:25:15.251 With time almost up... 00:25:15.276 --> 00:25:17.142 Why would you use that string? 00:25:17.167 --> 00:25:19.532 No, the string was fine. No, the string snapped. 00:25:19.557 --> 00:25:22.332 ...Enrique needs to replace his cocktail shaker string, 00:25:22.357 --> 00:25:24.652 and Ruben's got issues with his loo roll. 00:25:24.677 --> 00:25:26.251 It seems to come off too easily. 00:25:26.276 --> 00:25:28.972 So I'm gonna try to put two layers and see that it works. 00:25:28.997 --> 00:25:31.301 Don't worry about my bit, worry about yours. 00:25:31.326 --> 00:25:33.612 Teams? Teams! 00:25:33.637 --> 00:25:36.582 Um, one minute, one minute remaining. One minute. 00:25:36.607 --> 00:25:38.532 Just a minute. 00:25:38.557 --> 00:25:41.421 Adam's brolly needs a last-minute fix too. 00:25:41.446 --> 00:25:43.972 OK, get it in now! Put it in! 00:25:43.997 --> 00:25:45.421 Why's it always Adam's bit?! 00:25:45.446 --> 00:25:48.371 15, 15 seconds. 00:25:48.396 --> 00:25:50.692 These last-ditch tweaks could be the difference 00:25:50.717 --> 00:25:52.582 between reaching the final... 00:25:52.607 --> 00:25:55.532 This is definitely made to dissolve. ..and going home. 00:25:55.557 --> 00:25:58.062 A lot better than the dodgy duct tape solution. 00:26:00.357 --> 00:26:01.732 Don't breathe. Six! 00:26:01.757 --> 00:26:04.142 I mean, except the fact that none of that worked. Five, four... 00:26:04.167 --> 00:26:07.171 Five seconds to spare! ..three, two, one, 00:26:07.196 --> 00:26:09.142 build time is over! 00:26:09.167 --> 00:26:12.942 Assemble the best you can and get it set as much as you can 00:26:12.967 --> 00:26:14.532 for a run through of stage two 00:26:14.557 --> 00:26:16.892 of your chain reaction machines, please. 00:26:16.917 --> 00:26:21.612 The Bueno Brothers are testing their landing machine first. 00:26:21.637 --> 00:26:24.222 There was a point today when you looked to be working 00:26:24.247 --> 00:26:29.501 in a calm, orderly, organised fashion, and then the usual 00:26:29.526 --> 00:26:31.462 chaos came back. Well, all good things 00:26:31.487 --> 00:26:33.301 have to come to an end, I guess. Yeah. 00:26:33.326 --> 00:26:37.222 They're hoping Enrique's football wedge will trigger a cocktail shaker 00:26:37.247 --> 00:26:39.501 to fill a cup that drops a weight, 00:26:39.526 --> 00:26:41.822 tipping a bar stool that mixes 00:26:41.847 --> 00:26:43.862 Ruben's elephant toothpaste reaction, 00:26:43.887 --> 00:26:46.171 soaking some paper that should set off 00:26:46.196 --> 00:26:48.412 javi's lethal gravity stage. 00:26:49.437 --> 00:26:50.942 Zach? 00:26:50.967 --> 00:26:54.582 Oh, there's a lot of dodgy elements in there, and it's not tested, 00:26:54.607 --> 00:26:56.142 so I have no idea. 00:26:56.167 --> 00:26:58.822 In your own time... Thank you. ..start your machine. 00:26:58.847 --> 00:27:00.692 Right, bro. You got this, bro. 00:27:02.047 --> 00:27:03.142 Please work. 00:27:06.917 --> 00:27:09.181 The elephant's toothpaste is mixing. 00:27:09.206 --> 00:27:10.412 It's just the water. 00:27:10.437 --> 00:27:12.251 It tilts over. There it goes. 00:27:13.607 --> 00:27:15.181 Oh, that is so cool, though. 00:27:15.206 --> 00:27:17.152 Yeah, that's cool. 00:27:17.177 --> 00:27:18.822 It just needs to soak through 00:27:18.847 --> 00:27:20.582 the paper to free Ruben's *. 00:27:20.607 --> 00:27:22.902 That's going to break that toilet paper. 00:27:22.927 --> 00:27:24.152 If it doesn't break the paper, 00:27:24.177 --> 00:27:26.511 I'll be annoyed cos I've tested it so many times. 00:27:26.536 --> 00:27:28.102 I used some extra time to hold it in. 00:27:28.127 --> 00:27:30.022 I think it might have been too much. 00:27:30.047 --> 00:27:31.942 How much tape did you use? 00:27:31.967 --> 00:27:33.511 Find a poky stick. 00:27:36.487 --> 00:27:38.692 What did you make it out of?! 00:27:41.717 --> 00:27:44.381 Into the next room! We did it...! 00:27:44.406 --> 00:27:48.022 OK, look, there was a slight interruption. It can be fixed. 00:27:48.047 --> 00:27:50.622 I think I just need to lay off on the tape. 00:27:50.647 --> 00:27:54.592 The overly resilient tape on Ruben's * was a blot 00:27:54.617 --> 00:27:57.381 on an otherwise successful run. 00:27:57.406 --> 00:28:02.181 And after Enrique's intervention, the bucket, axe and wheel combo 00:28:02.206 --> 00:28:04.772 flung the duck into the next room. 00:28:04.797 --> 00:28:08.232 On the one hand, it's calming because it's like, I know it works, 00:28:08.257 --> 00:28:10.592 but on the other hand it's incredibly infuriating 00:28:10.617 --> 00:28:12.982 because it's like they SHOULD have worked... COULD have worked. 00:28:13.007 --> 00:28:15.342 ...but I messed it up. I mean, like we messed it up. 00:28:15.367 --> 00:28:18.181 It was a very simple step for them to rectify, isn't it? 00:28:18.206 --> 00:28:19.822 Just a little bit less tape. 00:28:19.847 --> 00:28:22.872 Now the Field house Brothers. 00:28:22.897 --> 00:28:27.232 You have scaled it up and it has your trademark complexity 00:28:27.257 --> 00:28:28.702 and maybe even sophistication. 00:28:28.727 --> 00:28:31.672 We're a bit out of our comfort zone today cos we've tried to scale 00:28:31.697 --> 00:28:34.022 it up and also keep the technical stuff. 00:28:34.047 --> 00:28:36.422 So this is the first time we've tried to do that. 00:28:36.447 --> 00:28:38.702 They want the bedroom's train 00:28:38.727 --> 00:28:41.032 to send a toy car into a mallet, 00:28:41.057 --> 00:28:43.902 triggering Damien's Bueno-baiting crossbow, 00:28:43.927 --> 00:28:45.542 collapsing a trouser press 00:28:45.567 --> 00:28:47.822 that sets off Adam's gravity stage 00:28:47.847 --> 00:28:48.902 and spinning wheel, 00:28:48.927 --> 00:28:50.622 collapsing a web of rulers, 00:28:50.647 --> 00:28:52.902 switching on Robin's record player 00:28:52.927 --> 00:28:54.872 that winds open its cabinet doors, 00:28:54.897 --> 00:28:56.952 knocking a plant into my lounge. 00:28:56.977 --> 00:29:00.542 This machine checks every box for me except for the final one — 00:29:00.567 --> 00:29:03.152 will it work? In your own time, start your machine. 00:29:05.086 --> 00:29:07.391 It's good. 00:29:07.416 --> 00:29:08.872 Ooh, yeah. 00:29:08.897 --> 00:29:11.156 It's so small, but so cute! 00:29:12.911 --> 00:29:14.886 Will this work? It's working! 00:29:14.911 --> 00:29:16.656 Go on, sunshine. 00:29:16.681 --> 00:29:18.045 Gyroscopic... 00:29:19.241 --> 00:29:20.806 Rulers... 00:29:20.831 --> 00:29:22.686 Now it's just Robin's bit... 00:29:22.711 --> 00:29:24.216 Oh, it's opening! Suspense. 00:29:24.241 --> 00:29:25.886 Yeah. Oh, it's a slow bit. 00:29:27.520 --> 00:29:30.045 A really nice chess piece there 00:29:30.070 --> 00:29:31.526 on the inside. That's cool. 00:29:32.791 --> 00:29:34.326 Oh, out the door. 00:29:34.351 --> 00:29:35.856 Yes! 00:29:35.881 --> 00:29:38.526 Come on! Wow! 00:29:38.551 --> 00:29:41.295 That is, yeah, classy. That's classy. Well done. 00:29:41.320 --> 00:29:42.936 Really relieved that works! 00:29:44.631 --> 00:29:46.656 They've pulled it off. 00:29:46.681 --> 00:29:48.526 What a machine! 00:29:48.551 --> 00:29:52.936 I think it appears to be a lot more reliable than it actually is. 00:29:52.961 --> 00:29:55.766 But will they be able to keep it up when Zach judges 00:29:55.791 --> 00:29:58.495 the all—important full runs tomorrow? 00:29:58.520 --> 00:30:00.856 You know, somebody gets lucky on the day. 00:30:00.881 --> 00:30:03.495 There's a very high chance that that's just what's going to push it. 00:30:03.520 --> 00:30:04.736 I can't wait! 00:30:09.320 --> 00:30:11.606 Today's the big one 00:30:11.631 --> 00:30:14.115 because, in ten hours, Zach will send either 00:30:14.140 --> 00:30:17.476 the Field house or Bueno Brothers through to the final. 00:30:17.501 --> 00:30:20.686 But before then, each team needs to create a machine 00:30:20.711 --> 00:30:22.606 that dusts my vase in the study, 00:30:22.631 --> 00:30:25.476 join it to their bedroom and landing machines, 00:30:25.501 --> 00:30:28.556 then run it as one crazy contraption. 00:30:28.581 --> 00:30:32.886 With so much at stake, they really don't need any complications. 00:30:33.861 --> 00:30:36.245 Morning, teams. Here is a complication. 00:30:36.270 --> 00:30:38.966 In your workshops, you'll find a mystery object that you must 00:30:38.991 --> 00:30:40.656 incorporate into today's build. 00:30:40.681 --> 00:30:45.016 Where and how you use it is up to you. But use it you must. 00:30:45.041 --> 00:30:46.086 Let's go. 00:30:47.791 --> 00:30:49.766 I wonder what it could be. 00:30:50.961 --> 00:30:52.446 It's right there. 00:30:52.471 --> 00:30:53.686 Is this our mystery object? 00:30:53.711 --> 00:30:56.556 Well, it's got a bow on it, and I didn't put a bow on it. 00:30:56.581 --> 00:31:00.045 Zac's expecting some out—of—the—box ideas from the rivals. 00:31:00.070 --> 00:31:03.656 Right, if it's on, it's creating a vacuum. 00:31:04.991 --> 00:31:07.326 So it can be holding something. It could also blow. 00:31:07.351 --> 00:31:09.295 We could blow stuff out of the air vent as well. Yeah. 00:31:09.320 --> 00:31:11.915 So what else CAN you do with a vacuum cleaner? 00:31:17.961 --> 00:31:21.125 I'm at one end of an industrial wind tunnel — 00:31:21.150 --> 00:31:22.886 the suction end. 00:31:22.911 --> 00:31:27.456 And through the tunnel is a fan, specifically designed to * air in 00:31:27.481 --> 00:31:29.766 and blow air out through the back. 00:31:29.791 --> 00:31:32.406 And that's exactly what happens in a vacuum cleaner. 00:31:33.761 --> 00:31:36.566 The team could actually use the air that's blown out 00:31:36.591 --> 00:31:38.245 to maybe inflate something. 00:31:41.911 --> 00:31:43.245 Pretty good. 00:31:44.431 --> 00:31:48.175 But they can also use the suction to maybe lift objects up. 00:31:50.561 --> 00:31:53.016 And the teams could work out how to... 00:31:54.481 --> 00:31:56.286 ...by switching off the vacuum cleaner... 00:31:57.711 --> 00:31:59.966 ...release an object. 00:31:59.991 --> 00:32:01.295 Brilliant. 00:32:01.320 --> 00:32:03.656 I must tell my housekeeper what they've been missing out on. 00:32:05.591 --> 00:32:08.566 Adam's excited by how well the vacuum blows. 00:32:08.591 --> 00:32:09.966 Yeah. 00:32:12.231 --> 00:32:14.175 Looks like Enrique is excited too... 00:32:14.200 --> 00:32:15.566 OK? Yeah. 00:32:15.601 --> 00:32:19.026 He plans to switch on the vacuum with a ball blocking its nozzle, 00:32:19.151 --> 00:32:21.486 causing its tube to stand proud 00:32:21.511 --> 00:32:23.816 until it automatically switches off, 00:32:23.841 --> 00:32:25.646 releasing the ball down a funnel. 00:32:26.950 --> 00:32:28.456 How do you turn it off? 00:32:28.481 --> 00:32:30.925 It turns out, when you block it, when you block it, 00:32:30.950 --> 00:32:34.256 after 30 seconds, which we discovered by accident. Ah! 00:32:34.471 --> 00:32:35.975 Lunchtime, that's going. 00:32:36.000 --> 00:32:39.905 Damien may have vacuum envy, but Adam's too busy to notice. 00:32:39.930 --> 00:32:43.216 He's planning to dust my vase by blowing air at it. 00:32:44.550 --> 00:32:46.855 See if you can feel anything. Ready? 00:32:46.880 --> 00:32:48.806 Go for it. 00:32:48.831 --> 00:32:50.266 Hello! 00:32:50.291 --> 00:32:51.446 Yes! 00:32:52.550 --> 00:32:54.446 He wants the vacuum's binbag 00:32:54.471 --> 00:32:57.296 to pull a plug from the bin as it inflates. 00:32:57.321 --> 00:33:00.266 Then a diaphragm at the back will be twanged, 00:33:00.291 --> 00:33:03.216 firing out a puff of air to dust my vase. 00:33:03.241 --> 00:33:07.136 He also appears to have created an ultrasonic weapon. 00:33:09.041 --> 00:33:11.376 Oh, that's squeaky! Awful sound. 00:33:13.961 --> 00:33:17.296 You have officially outdone yourselves 00:33:17.321 --> 00:33:19.626 in annoyingness from the last time. 00:33:19.651 --> 00:33:24.626 Both teams are trying to outdo each other, working at breakneck speed. 00:33:24.651 --> 00:33:27.346 There is a lot of pressure riding on today. 00:33:27.371 --> 00:33:31.735 We have to make sure that we can get everything done early so we can test 00:33:31.760 --> 00:33:34.985 all the other rooms. And the strain's showing 00:33:35.010 --> 00:33:36.626 on big brother Damien 00:33:36.651 --> 00:33:39.166 as he's trying to control their boldest, 00:33:39.191 --> 00:33:40.985 most bueno—baiting stunt yet — 00:33:41.010 --> 00:33:42.525 a falling sofa. 00:33:44.841 --> 00:33:47.576 Cor. Doesn't want to get through the carpet. 00:33:48.760 --> 00:33:50.706 I've not had a good day so far. 00:33:50.731 --> 00:33:54.296 Yeah, I've been wasting a bit too much time trying to position 00:33:54.321 --> 00:33:57.735 that sofa. I really would have liked to have been a bit further 00:33:57.760 --> 00:34:01.376 ahead right now. So, yeah, I'm a bit stressed out. 00:34:01.401 --> 00:34:05.096 The last thing he needs is Javi taking him on head-to-head. 00:34:05.121 --> 00:34:07.785 All right, careful. I want to hopefully drop a piano, so just, 00:34:07.810 --> 00:34:09.246 yeah. 00:34:09.271 --> 00:34:12.216 On the plus side, Damien may be stressed... 00:34:12.241 --> 00:34:13.785 All right, piano. Here we go. 00:34:16.651 --> 00:34:20.216 ...but he's not so burnt out that he's calling his sofa... 00:34:20.241 --> 00:34:22.216 The piano dropped. ..a piano. 00:34:23.560 --> 00:34:26.216 Sorry. You're right. It's not a piano. It's a thing. 00:34:26.241 --> 00:34:30.146 Javi wants the THING to fall into a grandfather clock, 00:34:30.171 --> 00:34:32.985 pulling a string that turns on Enrique's nozzle, 00:34:33.010 --> 00:34:35.256 eventually releasing the ball, 00:34:35.281 --> 00:34:36.706 dropping the weight, 00:34:36.731 --> 00:34:38.426 switching on a leaf blower 00:34:38.451 --> 00:34:40.706 that terrifyingly spins the wig 00:34:40.731 --> 00:34:42.016 of a mannequin's head 00:34:42.041 --> 00:34:43.735 to dust my vase. 00:34:43.760 --> 00:34:45.506 Andrew, what time is it? 00:34:46.601 --> 00:34:48.146 Haven't you got a clock? 00:34:48.171 --> 00:34:49.762 Both teams are returning to what 00:34:49.786 --> 00:34:51.376 they know best... We can play. 00:34:51.401 --> 00:34:54.226 ...which, for Damien, is something fiddly with a battery, 00:34:54.251 --> 00:34:56.296 some magnets and a copper coil. 00:34:56.321 --> 00:34:58.985 So basically they're permanent magnets, 00:34:59.010 --> 00:35:01.615 magnetic field repels the magnetic field 00:35:01.640 --> 00:35:03.346 generated in the copper coils, 00:35:03.371 --> 00:35:05.706 which allows this to accelerate 00:35:05.731 --> 00:35:07.735 through the tube. 00:35:07.760 --> 00:35:09.226 There we go. 00:35:09.251 --> 00:35:11.506 The final plan will see a candle 00:35:11.531 --> 00:35:13.016 set off a Jacob's ladder, 00:35:13.041 --> 00:35:14.865 switching on the vacuum. 00:35:14.890 --> 00:35:17.456 This releases the air cannons bung 00:35:17.481 --> 00:35:19.376 and pulls a chalice that nudges 00:35:19.401 --> 00:35:21.655 the battery into the copper coil, 00:35:21.680 --> 00:35:22.735 which then accelerates 00:35:22.760 --> 00:35:24.226 out the other end, 00:35:24.251 --> 00:35:26.096 hitting some scissors that cut 00:35:26.121 --> 00:35:28.066 the string holding the sofa, which, as it falls, 00:35:28.091 --> 00:35:30.785 triggers the smoke cannon to dust my vase. 00:35:31.890 --> 00:35:34.590 This is the most risky part 00:35:34.614 --> 00:35:35.506 of the room so far. Yeah. For sure. 00:35:35.531 --> 00:35:39.985 With study machines built, the teams seem neck and neck to me. 00:35:40.010 --> 00:35:42.615 Perhaps the maestro sees it differently. 00:35:42.640 --> 00:35:45.896 In less than an hour, we will know which of these two teams 00:35:45.921 --> 00:35:47.096 heads to the final. 00:35:47.121 --> 00:35:49.506 I think they are on a level playing field right now. 00:35:49.531 --> 00:35:52.386 But you know what? I also still think that the Buenos, 00:35:52.411 --> 00:35:55.946 they're doing full test runs and they are still missing little things 00:35:55.971 --> 00:35:57.735 here and there that I've spotted. 00:35:57.760 --> 00:35:59.426 And yet, I also look at the Field house, 00:35:59.451 --> 00:36:00.985 where they are still only in room one 00:36:01.010 --> 00:36:02.816 and testing all those little fiddly bits 00:36:02.841 --> 00:36:05.176 and finding out, hey, it's not as reliable, 00:36:05.201 --> 00:36:08.066 and they have not made it to room two yet, to test. 00:36:08.091 --> 00:36:10.386 It is literally all to play for right now, 00:36:10.411 --> 00:36:11.946 so let them get on with it. 00:36:11.971 --> 00:36:13.865 Oh, are you all right with that? 00:36:13.890 --> 00:36:18.226 I need your help. Quick, please. I can't drop... 00:36:18.251 --> 00:36:20.896 Teams, five minutes left. 00:36:23.001 --> 00:36:26.466 There's a place in the final at stake for one of you. 00:36:26.491 --> 00:36:30.146 The margins between triumph and catastrophe are minute. 00:36:30.171 --> 00:36:32.106 Can we do one more test? Yeah, that's what I'm saying. 00:36:32.131 --> 00:36:33.785 Leave that for a sec. Go, go, go. 00:36:33.810 --> 00:36:35.615 Two minutes! Two minutes! 00:36:35.640 --> 00:36:37.976 Both teams are finding issues. 00:36:38.001 --> 00:36:41.226 The smoke machine didn't turn on. The smoke machine didn't come on for some reason. 00:36:42.451 --> 00:36:43.716 Why's that not attached? 00:36:43.741 --> 00:36:46.026 I'm tense, and I haven't built anything! 00:36:46.051 --> 00:36:48.336 I just hope my vase gets dusted! 00:36:48.361 --> 00:36:51.745 Just need to set it perfectly. OK, set it, set it, set it. 00:36:51.770 --> 00:36:54.186 30 seconds of build time left. That's it. 00:36:55.820 --> 00:36:57.106 Go, go. Turn it off. 00:36:57.131 --> 00:36:59.665 Let go. Turn it off. Oh, this is going to be good. 00:36:59.690 --> 00:37:01.106 Anything major, 00:37:01.131 --> 00:37:02.615 it is too late now. 00:37:02.640 --> 00:37:07.026 Five, four, three, two, one. 00:37:07.051 --> 00:37:08.545 Teams, stop! 00:37:08.570 --> 00:37:10.826 End of building, tools down. 00:37:10.851 --> 00:37:12.545 They've given everything, 00:37:12.570 --> 00:37:15.336 but which team has done enough to reach the final? 00:37:20.560 --> 00:37:23.946 After three days of intense sibling rivalry... 00:37:23.971 --> 00:37:27.226 You have officially outdone yourselves. 00:37:27.251 --> 00:37:30.865 ...the Field house and Bueno Brothers are going to run their vase—dusting 00:37:30.890 --> 00:37:34.735 chain reaction machines in full for the first time. 00:37:34.760 --> 00:37:36.506 Go big or go home. 00:37:36.531 --> 00:37:41.415 Hello! judge Zach will decide which team makes it to the final... 00:37:45.411 --> 00:37:48.776 ...based on the creativity and complexity of each machine... 00:37:50.001 --> 00:37:51.896 Oooh! Well, that bit works! 00:37:51.921 --> 00:37:53.665 Sort of! ..and whether or not 00:37:53.690 --> 00:37:56.896 they can run without human intervention once started. 00:37:56.921 --> 00:37:58.865 It's also on fire. 00:37:58.890 --> 00:38:03.816 Bueno Brothers, I don't need to remind you what's at stake here. 00:38:03.841 --> 00:38:08.226 This is a tense and weirdly sombre moment, somewhat undermined 00:38:08.251 --> 00:38:11.056 by the fact that your brother has a shopping basket on his head. 00:38:11.081 --> 00:38:12.696 Yes. Safety first. 00:38:12.721 --> 00:38:14.586 In my study, they want a sofa 00:38:14.611 --> 00:38:16.535 to smash a clock to the floor, 00:38:16.560 --> 00:38:18.306 switching on the vacuum cleaner 00:38:18.331 --> 00:38:20.026 that triggers a leaf blower 00:38:20.051 --> 00:38:22.336 to rotate a wig on a head 00:38:22.361 --> 00:38:23.776 that dusts my vase. 00:38:23.801 --> 00:38:25.256 But it'll only get this far 00:38:25.281 --> 00:38:28.256 if their bedroom and hallway machines work first. 00:38:29.491 --> 00:38:32.256 Look, I'm predicting total chaos, but I'm hoping 00:38:32.281 --> 00:38:34.648 they perfected that chaos. We're not 00:38:34.672 --> 00:38:35.586 going to put this off any longer. 00:38:35.611 --> 00:38:39.466 We wish you all the very, very best with a complete run of your machines 00:38:39.491 --> 00:38:42.186 start to finish. In your own time, begin. 00:38:44.611 --> 00:38:46.415 Off you go, bro. 00:38:46.440 --> 00:38:47.506 Do it. 00:39:02.161 --> 00:39:03.976 We're waiting for the reaction now. 00:39:04.001 --> 00:39:05.776 This takes time. 00:39:07.440 --> 00:39:09.466 That's quite... That's hopeful. 00:39:09.491 --> 00:39:11.056 REALLY reactive today. 00:39:12.210 --> 00:39:13.704 This pause kills me. 00:39:13.729 --> 00:39:14.704 Mm-hm. 00:39:28.370 --> 00:39:30.265 It all depends on this. 00:39:30.290 --> 00:39:31.624 It could actually do it. 00:39:31.649 --> 00:39:33.425 Come on, do it. 00:39:33.450 --> 00:39:34.735 Come on! 00:39:37.370 --> 00:39:39.225 Do it. Come on. 00:39:39.250 --> 00:39:40.425 This is it. 00:39:44.970 --> 00:39:46.345 All right. 00:39:47.399 --> 00:39:50.195 How you doing? Oh, my God, it actually did it. 00:39:50.220 --> 00:39:53.095 The forces and chaos were incredible, 00:39:53.120 --> 00:39:55.374 the scientific principle of gravity 00:39:55.399 --> 00:39:56.704 deployed powerfully... 00:39:58.120 --> 00:40:00.704 ...and the vacuum cleaner, unforgettable. 00:40:00.729 --> 00:40:02.275 Didn't believe it at first. 00:40:02.300 --> 00:40:03.665 I still haven't believed it. 00:40:03.690 --> 00:40:05.095 It was a very impressive machine. 00:40:05.120 --> 00:40:08.584 And, you know, the grandfather clock going down, 00:40:08.609 --> 00:40:10.865 the hair spinning, it was amazing. 00:40:10.890 --> 00:40:15.275 The ending was absolutely...amazing. 00:40:15.300 --> 00:40:16.865 But there's a hitch. 00:40:16.890 --> 00:40:18.425 It skipped a few steps. 00:40:18.450 --> 00:40:21.065 It skipped...it skipped one, 00:40:21.090 --> 00:40:24.384 but interestingly enough, like the steps still happened. 00:40:24.409 --> 00:40:27.915 The green ball in the landing was triggered by the impact 00:40:27.940 --> 00:40:29.305 of the falling drawer, 00:40:29.330 --> 00:40:32.865 instead of the ball falling from the metal tube as intended, 00:40:32.890 --> 00:40:36.105 essentially skipping Enrique's dresser. 00:40:36.130 --> 00:40:38.785 Zach will rule this stage out when judging 00:40:38.810 --> 00:40:40.555 this otherwise perfect run. 00:40:40.580 --> 00:40:42.995 Can their rivals do better? 00:40:43.020 --> 00:40:44.464 Field houses. 00:40:44.489 --> 00:40:46.785 You all right? Very nervous. Nervous. 00:40:46.810 --> 00:40:48.105 You're fairly quiet. 00:40:48.130 --> 00:40:50.425 We haven't actually tested a full run yet. 00:40:50.450 --> 00:40:51.834 In the study, they want a candle 00:40:51.859 --> 00:40:54.105 to trigger Robin's Jacob's ladder, 00:40:54.130 --> 00:40:56.555 switching on a vacuum that releases 00:40:56.580 --> 00:40:58.865 the bin's bung and pulls a chalice 00:40:58.890 --> 00:41:00.785 towards a battery, 00:41:00.810 --> 00:41:02.275 knocking it through a copper coil 00:41:02.300 --> 00:41:03.945 that should make some scissors cut 00:41:03.970 --> 00:41:05.584 the string holding the sofa, 00:41:05.609 --> 00:41:07.584 triggering an air cannon 00:41:07.609 --> 00:41:09.464 to blow dust from my vase — 00:41:09.489 --> 00:41:13.795 provided their bedroom and landing machines work first. 00:41:14.890 --> 00:41:17.504 That's a complicated thing. Yeah, absolutely. 00:41:17.529 --> 00:41:20.555 It is the most intricate, fiddly machine we've ever seen. 00:41:20.580 --> 00:41:23.195 So I... But I have hope for it. 00:41:23.220 --> 00:41:25.714 I wish you all the luck in the world. More than that, 00:41:25.739 --> 00:41:28.075 I hope you don't need it. In your own time, 00:41:28.100 --> 00:41:29.491 start your machine. 00:41:29.515 --> 00:41:30.504 Go, Adam! Go, Adam! 00:41:30.529 --> 00:41:31.745 Start the machine. 00:41:58.180 --> 00:42:00.435 It's not going. 00:42:01.489 --> 00:42:03.355 It's not going. It's not moving. 00:42:03.380 --> 00:42:05.155 Hairdryer's not moving. 00:42:05.180 --> 00:42:06.875 Oh, it IS moving! 00:42:08.539 --> 00:42:10.795 It was WARMING itself up. 00:42:10.820 --> 00:42:12.714 That was tense. Hairdryer joke. 00:42:24.180 --> 00:42:25.795 Oh, I love that car. 00:42:27.770 --> 00:42:29.235 Oh, so cool! 00:42:52.310 --> 00:42:55.235 So elegant, the wind-up. Beautiful. A beautiful step. 00:43:02.539 --> 00:43:04.075 Just to remind us who they are. 00:43:06.900 --> 00:43:08.795 Is it going through...the battery? 00:43:14.180 --> 00:43:15.795 The machine has stopped. 00:43:15.820 --> 00:43:18.075 The chalice didn't push the battery 00:43:18.100 --> 00:43:19.875 into the copper coil. 00:43:21.820 --> 00:43:24.185 They need the first of three interventions 00:43:24.210 --> 00:43:26.235 they're allowed in the rules. 00:43:26.260 --> 00:43:28.514 Adam, intervene. I'm going to pull the chalice. 00:43:35.980 --> 00:43:38.235 Yeah, come on! One intervention! 00:43:38.260 --> 00:43:39.724 One intervention! 00:43:41.749 --> 00:43:44.035 That was intense! 00:43:44.060 --> 00:43:46.755 That was intense, and I didn't even build it! 00:43:48.340 --> 00:43:51.005 The first two rooms were majestic. 00:43:51.030 --> 00:43:53.035 Gravity was used with wit and 00:43:53.060 --> 00:43:55.755 vacuum cleaner deployed creatively, 00:43:55.780 --> 00:43:57.675 but their fiddliest stage 00:43:57.700 --> 00:43:59.235 was their downfall. 00:43:59.260 --> 00:44:00.644 The chalice missed the battery 00:44:00.669 --> 00:44:02.235 by an inch. 00:44:04.110 --> 00:44:08.474 They have so many incredibly clever ideas, the sort of thing you go, 00:44:08.499 --> 00:44:10.835 "Why didn't I think of that? That's brilliant." Who knows? 00:44:10.860 --> 00:44:13.365 Who knows who's going to go through. We have no idea. 00:44:13.390 --> 00:44:16.724 Zach has to pick between a machine that skipped a step 00:44:16.749 --> 00:44:18.675 and one that needed an intervention. 00:44:18.700 --> 00:44:20.955 What a semifinal. 00:44:20.980 --> 00:44:22.035 Both teams worthy of it, 00:44:22.060 --> 00:44:24.514 both teams upped their games from the heats. 00:44:24.539 --> 00:44:27.005 Absolutely. Both phenomenal machines. 00:44:27.030 --> 00:44:29.315 Every bit that one team has done, 00:44:29.340 --> 00:44:31.644 the other one's balanced it out somewhere. 00:44:31.669 --> 00:44:32.724 It is teetering right now. 00:44:32.749 --> 00:44:35.594 It is the closest I've ever had to call it right now. 00:44:38.220 --> 00:44:39.805 Teams, 00:44:39.830 --> 00:44:44.165 thank you for an incredible semifinal and for presenting us 00:44:44.190 --> 00:44:46.835 with two such incredible machines. 00:44:46.860 --> 00:44:50.755 And thank you guys so much, because you just made my job 00:44:50.780 --> 00:44:52.115 that much harder. 00:44:52.140 --> 00:44:55.005 It came down to every element of every single room 00:44:55.030 --> 00:44:56.445 that I had to look at, 00:44:56.470 --> 00:44:58.474 and it came down to the wire. 00:44:58.499 --> 00:45:03.555 So, ultimately, there is only one team leaving here for the final. 00:45:03.580 --> 00:45:06.445 And that winning team is... 00:45:11.270 --> 00:45:14.474 ...it's the Field houses. Well done, guys, 00:45:14.499 --> 00:45:19.035 for consistently taking it to the next level, which you did. 00:45:19.060 --> 00:45:20.805 Well done. 00:45:20.830 --> 00:45:23.195 Well done, guys. Well done, guys. 00:45:23.220 --> 00:45:24.915 Really HAPPY- 00:45:24.940 --> 00:45:27.755 I was really happy with how many things worked. 00:45:27.780 --> 00:45:29.216 It's a little bit disappointing. 00:45:29.240 --> 00:45:30.675 Yeah. Put so much time and effort 00:45:30.700 --> 00:45:32.724 into all the little intricacies, didn't we? 00:45:32.749 --> 00:45:36.035 And for the majority of them to actually come off. 00:45:36.060 --> 00:45:39.724 I think they absolutely deserve the win and... I think they do. 00:45:39.749 --> 00:45:43.295 I think their final step going wrong was down to luck, 00:45:43.320 --> 00:45:45.644 and it would have felt bad if we won 00:45:45.669 --> 00:45:47.604 because their machine got unlucky. 00:45:47.629 --> 00:45:50.724 Next stop for the Field house Brothers is the final. 00:45:50.749 --> 00:45:52.325 If they win the final, then, 00:45:52.350 --> 00:45:54.835 aah, losing to the winning team is not so bad. 00:45:54.860 --> 00:45:57.604 Going to go bigger — we've got to go bigger. Better. 00:45:57.629 --> 00:46:00.445 I think that's what Zach wants. Get more technical, more reliable — 00:46:00.470 --> 00:46:01.885 easy. What could go wrong? 00:46:03.299 --> 00:46:05.835 Next time. It's the second semifinal, 00:46:05.860 --> 00:46:07.401 as pilots... OK. 00:46:07.425 --> 00:46:08.965 ..take on social media stars... 00:46:08.990 --> 00:46:10.685 Did you cry at ET? ..in a banger 00:46:10.710 --> 00:46:13.165 of a sausage-sizzling challenge. Oh, my God!