1 00:00:02,000 --> 00:00:09,040 This programme contains some strong language 2 00:00:10,400 --> 00:00:14,960 Newton's first law states that an object in motion... 3 00:00:16,640 --> 00:00:21,400 ..will remain in motion unless an external force... 4 00:00:21,480 --> 00:00:24,760 ..imposes a change upon it. 5 00:00:26,840 --> 00:00:32,120 Similarly, an object at rest will remain at rest 6 00:00:32,200 --> 00:00:35,560 until an unbalanced force affects it. 7 00:00:35,640 --> 00:00:37,320 TABLET CLICKING 8 00:00:37,400 --> 00:00:41,000 This is also known as 9 00:00:41,080 --> 00:00:42,880 the law of inertia. 10 00:00:45,320 --> 00:00:48,440 Hi, how was your day? 11 00:00:48,520 --> 00:00:50,560 CLASSICAL MUSIC PLAYS SOFTLY 12 00:00:51,720 --> 00:00:53,560 Is there any food? 13 00:00:53,640 --> 00:00:56,600 Yes, there's a whole fridge full of food in front of you. 14 00:00:56,680 --> 00:01:00,080 Yeah, but it's all olives and hummus and shit. 15 00:01:00,160 --> 00:01:01,880 Something to actually eat? 16 00:01:01,960 --> 00:01:05,560 Um, not every meal comes in a tray, Zach. 17 00:01:05,640 --> 00:01:09,040 Some are made with what we humans call ingredients. 18 00:01:09,120 --> 00:01:10,520 TABLET CLICKING 19 00:01:13,880 --> 00:01:16,480 Don't eat all the cereal, please. 20 00:01:16,560 --> 00:01:18,480 There'll be none left for the morning. 21 00:01:20,120 --> 00:01:21,960 You can turn that off, you know. 22 00:01:22,040 --> 00:01:24,360 Turn what off? 23 00:01:25,480 --> 00:01:27,000 That stupid sound. 24 00:01:27,080 --> 00:01:28,800 I like it. 25 00:01:28,880 --> 00:01:32,480 It makes up for not having a proper bloomin' keyboard. 26 00:01:34,000 --> 00:01:36,160 What are you actually doing? 27 00:01:36,240 --> 00:01:39,440 I'm booking a smear test, if you must know. 28 00:01:40,440 --> 00:01:42,120 Eurgh. Well, you asked. 29 00:01:46,200 --> 00:01:48,200 HE SIGHS It's giving me a migraine. 30 00:01:48,280 --> 00:01:49,600 Don't exaggerate. 31 00:01:49,680 --> 00:01:50,960 Just disable clicks! 32 00:01:51,040 --> 00:01:53,320 I don't want to disable clicks! You disable clicks. 33 00:01:53,400 --> 00:01:54,680 I have done. 34 00:01:54,760 --> 00:01:55,800 Fine, then. 35 00:01:57,520 --> 00:01:59,160 HE EXHALES 36 00:02:16,880 --> 00:02:18,680 So, how was your day? 37 00:02:22,480 --> 00:02:23,920 Did you get your results back? 38 00:02:25,760 --> 00:02:27,480 Zachary? 39 00:02:27,560 --> 00:02:29,120 Yes. 40 00:02:29,200 --> 00:02:31,240 I got a B. 41 00:02:31,320 --> 00:02:32,880 What do you actually want? 42 00:02:34,200 --> 00:02:36,240 It'd be nice if we could just talk. 43 00:02:36,320 --> 00:02:38,000 You can talk, I'm not stopping you. 44 00:02:38,080 --> 00:02:41,480 I mean...a conversation, 45 00:02:41,560 --> 00:02:43,000 a bit of back and forth, 46 00:02:43,080 --> 00:02:44,640 I've been here on my own all day. 47 00:02:44,720 --> 00:02:46,760 That's not my fault. 48 00:02:46,840 --> 00:02:49,040 I don't think it's too much to ask to just sit 49 00:02:49,120 --> 00:02:51,160 and have half an hour together of an evening. 50 00:02:51,240 --> 00:02:52,640 Look, I'm not your boyfriend. 51 00:02:52,720 --> 00:02:55,720 If you want to talk to someone, go on...Tinder. 52 00:02:55,800 --> 00:02:58,080 I wasn't put on this Earth to make you happy. 53 00:03:02,040 --> 00:03:04,080 You can say that again. 54 00:03:05,120 --> 00:03:07,240 What's that supposed to mean? Nothing. 55 00:03:08,360 --> 00:03:10,000 You want to bin me off like you did Dad? 56 00:03:11,000 --> 00:03:12,680 Of course I don't. 57 00:03:15,200 --> 00:03:18,640 And it was him who walked out, remember? Not me. 58 00:03:18,720 --> 00:03:20,240 I don't blame him. 59 00:03:20,320 --> 00:03:22,880 Look, if I could go back and do things differently, 60 00:03:22,960 --> 00:03:24,440 I would do, but, Zach, 61 00:03:24,520 --> 00:03:28,880 can't we, please, live together 62 00:03:28,960 --> 00:03:32,600 without all of this constant argy-bargy? 63 00:03:32,680 --> 00:03:36,800 Let's cut the beef, bro. 64 00:03:38,360 --> 00:03:40,440 No-one says beef any more. 65 00:03:51,200 --> 00:03:53,240 HE TYPES 66 00:04:02,640 --> 00:04:04,160 THUD 67 00:04:13,400 --> 00:04:14,600 SHE EXHALES 68 00:04:14,680 --> 00:04:19,160 Oh, bloody hell... 69 00:04:19,240 --> 00:04:20,520 Oh! 70 00:04:23,280 --> 00:04:26,040 SHE EXHALES SLOWLY 71 00:04:41,360 --> 00:04:42,800 Oh... 72 00:04:45,520 --> 00:04:47,320 DOORBELL RINGS 73 00:04:49,640 --> 00:04:51,360 Ah, yes, I, er... 74 00:04:51,440 --> 00:04:53,520 I found this little - double T - bird 75 00:04:53,600 --> 00:04:55,960 just outside your house. Right. 76 00:04:56,040 --> 00:04:59,960 They fly towards their reflections in the windows, unfortunately. Huh. 77 00:05:01,160 --> 00:05:02,640 Oh, dear. 78 00:05:02,720 --> 00:05:05,440 Can we do anything for it, do you think? 79 00:05:05,520 --> 00:05:08,400 Er, if you had a small - double L - box 80 00:05:08,480 --> 00:05:10,720 and a quiet space, he might just come to. 81 00:05:10,800 --> 00:05:14,360 Um, yes. Yeah, come in. 82 00:05:14,440 --> 00:05:15,760 Oh, thank you. 83 00:05:25,240 --> 00:05:27,080 Hopefully, it's not a concussion. 84 00:05:27,160 --> 00:05:29,120 Sparrow, I think - double R. 85 00:05:29,200 --> 00:05:31,280 Aw... They're tough old birds. 86 00:05:31,360 --> 00:05:32,880 Poor thing. 87 00:05:34,320 --> 00:05:35,880 Er, shall I, er...? 88 00:05:35,960 --> 00:05:39,600 Oh, yeah. I'm Helen, by the way. 89 00:05:39,680 --> 00:05:41,520 Oh, erm, Bob. 90 00:05:41,600 --> 00:05:43,880 Bob Bliss - double S. 91 00:05:44,840 --> 00:05:48,560 At least we know his insides are functioning. How? 92 00:05:49,600 --> 00:05:51,200 Oh! SHE CHUCKLES 93 00:05:51,280 --> 00:05:53,040 Oh, here. Ooh! 94 00:05:53,120 --> 00:05:55,400 Thank you, thanks. 95 00:05:57,040 --> 00:05:59,120 It's very kind of you. 96 00:05:59,200 --> 00:06:00,920 A lot of people wouldn't have cared. 97 00:06:01,000 --> 00:06:03,080 Oh, well, I have a teenager, so... 98 00:06:04,040 --> 00:06:06,640 ..what's another feeble creature to look after? 99 00:06:08,360 --> 00:06:10,240 Both of mine have flown the nest now. 100 00:06:10,320 --> 00:06:11,800 Oh, lucky you. 101 00:06:11,880 --> 00:06:13,640 No, I shouldn't say that. 102 00:06:15,520 --> 00:06:18,200 So, is he the mathematician? He? 103 00:06:18,280 --> 00:06:20,080 Er, your teenager - double E. 104 00:06:20,160 --> 00:06:22,080 Oh, Zach, yes, yes. He's doing his A levels. 105 00:06:22,160 --> 00:06:24,640 Yeah, maths, physics and chemistry, God help him. 106 00:06:24,720 --> 00:06:26,360 Ha, great combo. 107 00:06:26,440 --> 00:06:30,680 I did my PhD in physics at Cambridge a few years ago. 108 00:06:30,760 --> 00:06:33,440 It's a fascinating subject, but a lot of it does depend 109 00:06:33,520 --> 00:06:35,120 on the teaching. PHONE RINGS 110 00:06:35,200 --> 00:06:38,200 Excuse me. Yes. 111 00:06:38,280 --> 00:06:40,880 Zach's teachers are terrible, so he tells me. 112 00:06:40,960 --> 00:06:44,400 It's all - double L - relative, so, er... 113 00:06:47,160 --> 00:06:50,160 Aw, this is my son, Zach. 114 00:06:50,240 --> 00:06:52,600 Pleased to - double E - meet you. 115 00:06:52,680 --> 00:06:54,000 FLUTTERING AND CHIRPING 116 00:06:54,080 --> 00:06:56,000 Oh, bloody hell! 117 00:06:59,360 --> 00:07:01,960 Come on. Oh! 118 00:07:02,040 --> 00:07:04,120 There he goes! 119 00:07:05,120 --> 00:07:06,320 DOOR CLOSES 120 00:07:06,400 --> 00:07:09,000 SHE SIGHS Zach, this is Bob. 121 00:07:09,080 --> 00:07:11,840 Bob studied physics at Cambridge. 122 00:07:14,280 --> 00:07:16,360 ZACH POURS DRINK 123 00:07:16,440 --> 00:07:18,640 Aren't you even going to say hi? 124 00:07:18,720 --> 00:07:20,920 Hi. Hi. Jinx! 125 00:07:21,000 --> 00:07:23,680 Oh, you meant him say hi to me? Apologies, er... 126 00:07:23,760 --> 00:07:26,200 Zach, you can speak now. 127 00:07:26,280 --> 00:07:28,760 I know I can. I'm not eight years old. 128 00:07:28,840 --> 00:07:31,120 FRIDGE DOOR OPENS 129 00:07:32,280 --> 00:07:33,800 FRIDGE DOOR CLOSES 130 00:07:36,480 --> 00:07:40,040 Right, as one uranium-238 nucleus said 131 00:07:40,120 --> 00:07:43,680 to the other uranium-238 nucleus, "I've got to split." 132 00:07:45,280 --> 00:07:47,000 He gets it. BOB CHUCKLES 133 00:07:47,080 --> 00:07:49,560 Yeah, it's nice to have met you, Helen. 134 00:07:49,640 --> 00:07:53,120 Er, Zach, best of luck with your studies. 135 00:07:53,200 --> 00:07:55,600 Hope that teaching improves. 136 00:07:55,680 --> 00:07:59,480 I live close by, if you ever wanted to go through anything. 137 00:08:01,240 --> 00:08:05,040 Wait, erm...sorry. 138 00:08:05,120 --> 00:08:07,360 SHE LAUGHS NERVOUSLY 139 00:08:07,440 --> 00:08:08,760 You don't do any tutoring, do you? 140 00:08:08,840 --> 00:08:11,160 It's just that Zach needs to punch up his predicted grades. 141 00:08:11,240 --> 00:08:12,960 Mum! Well, it's true! 142 00:08:13,040 --> 00:08:15,640 Don't you want to get into a good uni, like Bob did? 143 00:08:15,720 --> 00:08:17,360 She's so cringy, it's embarrassing. 144 00:08:17,440 --> 00:08:19,640 I do have some spare time at the moment. 145 00:08:19,720 --> 00:08:23,120 That is to say, I'm not fully - double L - engaged, erm... 146 00:08:23,200 --> 00:08:26,120 Yeah, why don't I come round Thursday at six, 147 00:08:26,200 --> 00:08:27,520 see - double E - how we get on? 148 00:08:27,600 --> 00:08:30,600 And then if Zach thinks it's useful... Yeah, whatever. 149 00:08:30,680 --> 00:08:33,160 Anything to avoid spending time with her. 150 00:08:36,240 --> 00:08:41,560 Newton's second law of motion, in its simplest form, 151 00:08:41,640 --> 00:08:45,360 can be expressed by the equation F=ma, 152 00:08:45,440 --> 00:08:50,080 or force equals mass times acceleration. 153 00:08:50,160 --> 00:08:52,160 It's why this car, 154 00:08:52,240 --> 00:08:54,000 which has a greater mass, 155 00:08:54,080 --> 00:08:56,000 will travel less far 156 00:08:56,080 --> 00:08:57,720 than this car 157 00:08:57,800 --> 00:09:00,280 when identical force is applied. 158 00:09:11,880 --> 00:09:13,840 Oh, this is top-notch, Zach. 159 00:09:13,920 --> 00:09:16,080 Well - double L - done. 160 00:09:16,160 --> 00:09:19,360 Remember to put the, er, date on the top. 161 00:09:19,440 --> 00:09:20,880 '62? 162 00:09:20,960 --> 00:09:22,880 GROANS Is that when you were born? 163 00:09:22,960 --> 00:09:25,520 Yes, yes, I'm afraid I am rather old. 164 00:09:25,600 --> 00:09:30,120 So why is F=ma a special case of the second law? 165 00:09:31,960 --> 00:09:35,800 Well, it assumes that the mass remains constant. 166 00:09:35,880 --> 00:09:38,320 It uses an inertial frame of reference. 167 00:09:38,400 --> 00:09:39,480 Which means? 168 00:09:39,560 --> 00:09:41,800 That there are no outside forces acting on it 169 00:09:41,880 --> 00:09:43,160 that make it accelerate. 170 00:09:43,240 --> 00:09:44,280 Very good - double O. 171 00:09:44,360 --> 00:09:47,560 So, what outside forces are acting on you right now? 172 00:09:47,640 --> 00:09:50,240 Gravity, 173 00:09:50,320 --> 00:09:51,960 the Earth spinning, 174 00:09:52,040 --> 00:09:53,360 you... 175 00:09:53,440 --> 00:09:56,680 And the harder you're pushed, the further you can travel, yes? 176 00:09:56,760 --> 00:09:58,320 BOTH CHUCKLE 177 00:09:58,400 --> 00:10:00,400 OK. Thanks. 178 00:10:05,600 --> 00:10:08,160 I, erm... I couldn't help but notice your tattoo - 179 00:10:08,240 --> 00:10:09,320 double T, double O. 180 00:10:12,320 --> 00:10:13,840 Yeah, er... 181 00:10:15,520 --> 00:10:17,560 I only did it to piss my mum off. 182 00:10:17,640 --> 00:10:19,240 And did it work? 183 00:10:19,320 --> 00:10:21,080 She hasn't noticed. 184 00:10:21,160 --> 00:10:23,600 That's how much she cares about me. 185 00:10:23,680 --> 00:10:25,960 Oh, I think she does care, Zach. 186 00:10:26,040 --> 00:10:28,720 I think she cares very deeply - double E - 187 00:10:28,800 --> 00:10:31,800 but, as you know, objects with the same force do... 188 00:10:31,880 --> 00:10:34,720 ..repel each other. Repel each other. Yeah. 189 00:10:36,120 --> 00:10:39,960 I don't want to pry, but, erm, is your father...? 190 00:10:40,040 --> 00:10:44,560 Oh. He, er, lives in Singapore. 191 00:10:45,720 --> 00:10:47,800 He's got a new family now, so... 192 00:10:50,080 --> 00:10:51,920 ..I don't really get to see him that often. 193 00:10:53,400 --> 00:10:55,240 That must be hard. 194 00:10:55,320 --> 00:10:57,200 For you and for your mother. 195 00:10:57,280 --> 00:10:59,200 I don't have a problem with it. 196 00:10:59,280 --> 00:11:01,360 She's the one that's fuckin' mental. 197 00:11:01,440 --> 00:11:04,080 That's a strong word to use. You don't have to live with her. 198 00:11:07,480 --> 00:11:09,040 Zach... 199 00:11:10,320 --> 00:11:12,280 I'm... Dinner's ready! 200 00:11:14,560 --> 00:11:16,280 OK. 201 00:11:16,360 --> 00:11:17,920 CLASSICAL MUSIC PLAYS SOFTLY 202 00:11:18,000 --> 00:11:20,320 That was lovely, thank you. Sure you don't want a glass? 203 00:11:20,400 --> 00:11:22,400 No, no, I'm fine. Just one? Just a little bit? 204 00:11:22,480 --> 00:11:25,160 Honestly, I'm fine. OK. Well, more for me. 205 00:11:29,760 --> 00:11:32,000 Hey, I've got some homework for you. 206 00:11:32,080 --> 00:11:34,360 It's the Grand National on Saturday. 207 00:11:34,440 --> 00:11:38,040 Now, study the weights of the horses and the jockeys. 208 00:11:38,120 --> 00:11:41,800 Try and use physics to pick us out a winner - double N. 209 00:11:41,880 --> 00:11:44,240 You're teaching him gambling? 210 00:11:44,320 --> 00:11:45,520 That's not very responsible. 211 00:11:45,600 --> 00:11:47,640 It's not gambling if you know who's going to win. 212 00:11:47,720 --> 00:11:49,120 Pick me one, Zach. 213 00:11:49,200 --> 00:11:51,200 Pick your own! 214 00:11:51,280 --> 00:11:52,800 Hm! Hm! 215 00:11:57,080 --> 00:11:58,200 So... 216 00:11:59,560 --> 00:12:01,600 What do you do with your days? 217 00:12:01,680 --> 00:12:03,480 If you don't mind me asking. 218 00:12:03,560 --> 00:12:04,920 No, erm... 219 00:12:06,400 --> 00:12:09,840 I work part time as a book-keeper - double O, double K, double E. 220 00:12:09,920 --> 00:12:11,160 A bit of a mouthful. 221 00:12:11,240 --> 00:12:12,600 Yes. 222 00:12:12,680 --> 00:12:15,720 Well...you could be... 223 00:12:15,800 --> 00:12:17,920 ..an egg batterer, 224 00:12:18,000 --> 00:12:20,240 and then you'd say, 225 00:12:20,320 --> 00:12:22,440 "Double G and T," every day! Double G and T. 226 00:12:22,520 --> 00:12:25,480 You'd end up pissed! SHE CHUCKLES 227 00:12:27,520 --> 00:12:29,240 So, go on, 228 00:12:29,320 --> 00:12:32,360 why do you do it, Blob...Bob? 229 00:12:32,440 --> 00:12:33,640 Bob Bliss. 230 00:12:33,720 --> 00:12:35,560 Stop interrogating him. What? 231 00:12:35,640 --> 00:12:38,240 It's called conversation, Zach. 232 00:12:38,320 --> 00:12:40,080 Listen and learn. 233 00:12:40,160 --> 00:12:44,000 Go on, what's it all about? Double X, double L? 234 00:12:44,080 --> 00:12:48,920 Well, I suppose - double P - it's, er, a mild form of OCD. 235 00:12:49,000 --> 00:12:51,280 As a student of physics, 236 00:12:51,360 --> 00:12:54,360 I was constantly trying to find patterns - double T - 237 00:12:54,440 --> 00:12:56,400 in data and numbers, 238 00:12:56,480 --> 00:12:58,640 and then in words. 239 00:12:58,720 --> 00:13:00,360 Yeah, I find it calming. 240 00:13:00,440 --> 00:13:04,240 I get it. When everything feels like it's unravelling, 241 00:13:04,320 --> 00:13:07,600 and you've just got to hold on to something. It's like my clicks. 242 00:13:07,680 --> 00:13:11,400 I need my clicks, and he doesn't want me to have them, 243 00:13:11,480 --> 00:13:12,880 but I say, "No, they're for me." 244 00:13:15,000 --> 00:13:16,560 Fuck's sake. 245 00:13:19,640 --> 00:13:22,440 Zach, come back. Come back now. 246 00:13:22,520 --> 00:13:23,680 Why? 247 00:13:23,760 --> 00:13:27,320 So I can sit there and listen to you chat shit all night? 248 00:13:27,400 --> 00:13:28,880 You're pathetic. 249 00:13:34,640 --> 00:13:36,640 It's OK, honestly. 250 00:13:38,160 --> 00:13:40,440 I dare say, it's just his hormones, 251 00:13:40,520 --> 00:13:42,440 plus his dad walking out. 252 00:13:42,520 --> 00:13:45,120 HELEN BREATHES DEEPLY 253 00:13:45,200 --> 00:13:47,520 Up against my hormones, 254 00:13:47,600 --> 00:13:50,280 plus red wine - not a good combo. 255 00:13:50,360 --> 00:13:53,720 I'm sure we were all - double L - the same at his age. 256 00:13:54,920 --> 00:13:58,280 Maybe if I could spend more time with him, I... 257 00:13:58,360 --> 00:14:01,360 Why does nature do it, eh? 258 00:14:02,400 --> 00:14:03,440 Give us the menopause 259 00:14:03,520 --> 00:14:05,880 just as our kids are becoming feral monsters. 260 00:14:05,960 --> 00:14:07,920 Can science explain that? 261 00:14:08,000 --> 00:14:09,840 He's not a monster. 262 00:14:09,920 --> 00:14:11,880 He's not. 263 00:14:11,960 --> 00:14:14,040 He's just...an angry young man. 264 00:14:17,080 --> 00:14:20,040 I'm so tired, Bob. 265 00:14:21,680 --> 00:14:23,200 I know. 266 00:14:31,000 --> 00:14:33,280 Right, I'd best be off. 267 00:14:33,360 --> 00:14:35,320 Thanks for dinner - 268 00:14:35,400 --> 00:14:36,600 double N. 269 00:14:36,680 --> 00:14:39,200 And double F - off. 270 00:14:39,280 --> 00:14:42,200 Double F - off. 271 00:14:46,560 --> 00:14:50,280 A force is a push or a pull 272 00:14:50,360 --> 00:14:52,280 that acts upon an object 273 00:14:52,360 --> 00:14:56,360 as a result of its interaction with another object. 274 00:14:56,440 --> 00:14:59,280 These forces are subject 275 00:14:59,360 --> 00:15:03,440 to Newton's third law of motion. 276 00:15:03,520 --> 00:15:05,160 For every action, 277 00:15:05,240 --> 00:15:10,800 there is an equal and opposite reaction. 278 00:15:15,520 --> 00:15:17,480 CLICKING 279 00:15:20,000 --> 00:15:21,640 CLICKING 280 00:15:23,120 --> 00:15:25,320 CLASSICAL MUSIC PLAYS SOFTLY 281 00:15:25,400 --> 00:15:28,360 CHIRPING 282 00:15:34,960 --> 00:15:37,400 CHIRPING CONTINUES 283 00:15:54,560 --> 00:15:56,280 "Bob Bliss." 284 00:15:57,720 --> 00:15:59,720 PHONE BUZZES 285 00:16:07,800 --> 00:16:10,200 SHE SIGHS 286 00:16:10,280 --> 00:16:11,560 Hello? 287 00:16:11,640 --> 00:16:12,960 Um, speaking. 288 00:16:14,040 --> 00:16:15,280 OK. 289 00:16:17,200 --> 00:16:18,640 Today? 290 00:16:18,720 --> 00:16:23,280 Um, yes, I can be there in about half an hour. 291 00:16:24,520 --> 00:16:26,320 Right. 292 00:16:26,400 --> 00:16:28,120 Right, er, I know you... 293 00:16:28,200 --> 00:16:31,520 ..you can't tell me, but is it regarding my test? 294 00:16:34,000 --> 00:16:36,680 No, no. No, no, I understand. 295 00:16:36,760 --> 00:16:38,400 I understand. Right. 296 00:16:40,280 --> 00:16:42,480 Yeah, OK, thank you. 297 00:16:46,640 --> 00:16:48,080 SHE SIGHS 298 00:16:56,760 --> 00:16:58,160 MUFFLED: Hey, Mum, guess what? 299 00:16:59,160 --> 00:17:02,040 You know Bob put a bet on the Grand National on Saturday? 300 00:17:02,120 --> 00:17:04,680 Well, his horse only won. 301 00:17:04,760 --> 00:17:07,320 He put 60 quid on at 33-1. 302 00:17:09,800 --> 00:17:11,240 Sorry? 303 00:17:11,320 --> 00:17:13,960 Bob won nearly two grand, 304 00:17:14,040 --> 00:17:16,520 and he said he's going to give me half of it for my uni fund. 305 00:17:16,600 --> 00:17:19,720 I don't want him coming round here any more. 306 00:17:20,920 --> 00:17:22,000 What? 307 00:17:23,280 --> 00:17:26,000 And you're not to take that money, do you hear? 308 00:17:27,200 --> 00:17:30,600 Why? What's wrong with him? 309 00:17:32,360 --> 00:17:34,080 We've got no idea who he is. 310 00:17:34,160 --> 00:17:35,680 He could be anybody. 311 00:17:35,760 --> 00:17:36,840 He's just... 312 00:17:38,080 --> 00:17:39,360 ..just some weirdo 313 00:17:39,440 --> 00:17:41,160 who just turned up at our door one day. 314 00:17:41,240 --> 00:17:43,040 What is wrong with yer? 315 00:17:43,120 --> 00:17:44,800 Why do you have to ruin anything decent 316 00:17:44,880 --> 00:17:46,280 that comes into my life? 317 00:17:46,360 --> 00:17:49,360 It's for your own good. What happened? 318 00:17:49,440 --> 00:17:52,520 Did you pathetically come on to him? 319 00:17:52,600 --> 00:17:55,160 I haven't got time for this. You've never got time. 320 00:17:55,240 --> 00:17:58,720 Whenever I try and talk to you, you're always doing something else. 321 00:17:58,800 --> 00:18:00,680 Cooking, cleaning, washing your clothes, 322 00:18:00,760 --> 00:18:03,400 trying to scrape together enough money to send you to university! 323 00:18:03,480 --> 00:18:04,520 Well, don't bother! 324 00:18:04,600 --> 00:18:07,320 I'm going to uni in Singapore, and Dad's paying for it. 325 00:18:07,400 --> 00:18:09,680 Ha-ha-ha! What do you mean "ha"? He promised. 326 00:18:09,760 --> 00:18:11,920 What? Like he promised to take you over for Christmas? 327 00:18:12,000 --> 00:18:13,080 Well, fine, then! 328 00:18:13,160 --> 00:18:15,320 Go running off to him and see what happens! 329 00:18:15,400 --> 00:18:18,120 Well, at least he believes in me. You're such a fuckin' bitch! 330 00:18:18,200 --> 00:18:19,280 Do you know...? 331 00:18:20,240 --> 00:18:22,480 Sorry, Zach. 332 00:18:25,800 --> 00:18:27,400 I'm sorry, Zach. 333 00:18:27,480 --> 00:18:28,560 Zach... 334 00:18:30,600 --> 00:18:31,640 Zach? 335 00:18:34,560 --> 00:18:36,800 Listen, I've got to go to the... 336 00:18:52,360 --> 00:18:54,200 DOORBELL RINGS 337 00:18:57,680 --> 00:18:59,160 She's not here. 338 00:19:06,200 --> 00:19:07,480 DOOR CLOSES 339 00:19:08,720 --> 00:19:10,960 I've got some cash for you. CHUCKLES 340 00:19:11,040 --> 00:19:13,000 From the gee-gees - double G. 341 00:19:14,240 --> 00:19:16,080 I'm not allowed to take it. 342 00:19:17,080 --> 00:19:18,600 Why not? 343 00:19:18,680 --> 00:19:20,480 Have you had another row with your mum? 344 00:19:23,520 --> 00:19:25,040 Maybe I shouldn't have interfered. 345 00:19:27,120 --> 00:19:28,240 Here. 346 00:19:28,320 --> 00:19:30,440 I got her these. HE CHUCKLES 347 00:19:30,520 --> 00:19:32,080 Yellow roses - double L. 348 00:19:33,520 --> 00:19:35,800 Those are her favourites. 349 00:19:36,840 --> 00:19:38,000 Have you been stalking us? 350 00:19:41,480 --> 00:19:44,040 Do you want to put them in some water? 351 00:20:00,160 --> 00:20:01,400 OK. 352 00:20:01,480 --> 00:20:03,280 FOOTSTEPS STOMP AWAY 353 00:20:05,520 --> 00:20:07,000 KNOCKING ON DOOR 354 00:20:08,720 --> 00:20:10,480 DOOR OPENS 355 00:20:25,680 --> 00:20:27,920 Have you learned anything yet about the Doppler effect? 356 00:20:28,000 --> 00:20:29,080 Double P, double F. 357 00:20:30,240 --> 00:20:33,160 It describes the changing frequency of a wave 358 00:20:33,240 --> 00:20:34,560 in relation to an observer 359 00:20:34,640 --> 00:20:37,440 moving relative to the source of that wave - for example, 360 00:20:37,520 --> 00:20:40,400 why a police siren is higher in pitch when it approaches - 361 00:20:40,480 --> 00:20:44,120 double P - and lower in pitch when it drives away. 362 00:20:45,880 --> 00:20:46,960 It's like time. 363 00:20:48,560 --> 00:20:50,920 It drags when you're young, but when you're older... 364 00:20:51,960 --> 00:20:53,040 ..it flies by. 365 00:20:54,440 --> 00:20:56,400 And you find yourself thinking about the things 366 00:20:56,480 --> 00:20:58,720 you wish you'd done differently - double F. 367 00:20:59,760 --> 00:21:02,520 What you'd say to yourself if you could go back 40 years 368 00:21:02,600 --> 00:21:03,600 to when you were a boy. 369 00:21:03,680 --> 00:21:06,160 What are you talking about? 370 00:21:06,240 --> 00:21:08,600 In the future, it will be possible 371 00:21:08,680 --> 00:21:10,760 to manipulate gravitational waves, as I said - 372 00:21:10,840 --> 00:21:15,320 as you said - and harness the power of black holes. 373 00:21:16,720 --> 00:21:19,240 Harness is double S. It doesn't matter. Listen. 374 00:21:20,440 --> 00:21:23,960 What we thought was theoretical can actually be achieved, if... 375 00:21:24,040 --> 00:21:26,600 ..you get the physics right, and you did. 376 00:21:28,320 --> 00:21:29,840 Did what? 377 00:21:41,000 --> 00:21:43,800 '62 isn't when I was born, 378 00:21:43,880 --> 00:21:45,680 it's where I came from. 379 00:21:48,760 --> 00:21:50,920 Be kinder to your mother, Zach. 380 00:21:51,000 --> 00:21:52,640 You'll only ever have one - 381 00:21:52,720 --> 00:21:54,840 science'll never change that. 382 00:21:54,920 --> 00:21:56,080 And yours... 383 00:21:57,120 --> 00:21:58,400 ..ours... 384 00:22:00,160 --> 00:22:02,240 ..she's not going to be around for much longer. 385 00:22:04,120 --> 00:22:05,360 What do you mean? 386 00:22:06,960 --> 00:22:08,920 What are you talking about? 387 00:22:10,720 --> 00:22:13,000 She's dying, Zach. 388 00:22:16,880 --> 00:22:18,640 By the time you go away to Singapore, 389 00:22:18,720 --> 00:22:20,480 you'll have stopped speaking to each other, 390 00:22:20,560 --> 00:22:22,360 and then it's going to be too late. 391 00:22:22,440 --> 00:22:23,480 And believe me, 392 00:22:23,560 --> 00:22:25,600 you'll spend the rest of your life regretting it. 393 00:22:25,680 --> 00:22:26,920 You'll close in on yourself. 394 00:22:27,000 --> 00:22:28,640 Your own kids will walk away from you. 395 00:22:28,720 --> 00:22:30,440 And you'll understand too late 396 00:22:30,520 --> 00:22:33,080 just how much she sacrificed for you, 397 00:22:33,160 --> 00:22:36,080 how incredibly brave she was, 398 00:22:36,160 --> 00:22:38,680 and that guilt will cripple you for life. 399 00:22:38,760 --> 00:22:42,200 No, this is bullshit! You've got to believe me, Zach, please. 400 00:22:43,680 --> 00:22:45,080 Please. 401 00:22:49,600 --> 00:22:51,720 SHE EXHALES SLOWLY 402 00:22:51,800 --> 00:22:53,200 SHE SOBS 403 00:22:56,360 --> 00:22:57,760 Oh... 404 00:22:57,840 --> 00:22:59,040 SHE SNIFFS 405 00:23:03,760 --> 00:23:06,200 PHONE RINGS 406 00:23:12,000 --> 00:23:15,200 I just need you to tell her I love her. Very much. 407 00:23:17,880 --> 00:23:21,120 It won't save her, but it could save you. 408 00:23:21,200 --> 00:23:23,840 Just a random act of kindness... 409 00:23:25,600 --> 00:23:27,440 ..so you can have my time again. 410 00:23:28,720 --> 00:23:29,800 GUN COCKS 411 00:23:29,880 --> 00:23:32,040 HE BREATHES HEAVILY 412 00:23:32,120 --> 00:23:34,200 PHONE RINGS 413 00:23:35,760 --> 00:23:36,720 Hello? 414 00:23:36,800 --> 00:23:38,440 Zach, can you hear me? 415 00:23:38,520 --> 00:23:40,240 What the fuck do you think you're doing? 416 00:23:40,320 --> 00:23:42,040 Zach's my son. Who is this, please? 417 00:23:42,120 --> 00:23:45,560 Oh, God. Er, please, Mrs Wilson, try to stay calm. 418 00:23:45,640 --> 00:23:48,320 I think your son could be in grave danger. 419 00:23:48,400 --> 00:23:51,120 The man whose phone this is, he...he's not to be trusted. 420 00:23:51,200 --> 00:23:52,920 Do you understand? Do you mean Bob? 421 00:23:53,000 --> 00:23:55,400 You mustn't leave your son alone with him. 422 00:23:55,480 --> 00:23:56,440 But he's... 423 00:23:56,520 --> 00:23:57,720 GUNSHOT Zach? 424 00:23:57,800 --> 00:23:59,920 Mrs Wilson... Zachary! ..let me speak to him... 425 00:24:01,800 --> 00:24:03,760 HE BREATHES HEAVILY 426 00:24:05,240 --> 00:24:06,800 Are you all right? 427 00:24:07,800 --> 00:24:09,120 Oh! 428 00:24:09,200 --> 00:24:11,040 Oh, it's OK, it's all right. 429 00:24:11,120 --> 00:24:12,600 It's OK. SOBS: I love you, Mum. 430 00:24:12,680 --> 00:24:14,160 I love you, too! 431 00:24:14,240 --> 00:24:17,600 I love you so much. 432 00:24:18,960 --> 00:24:20,480 Everything's going to be OK. 433 00:24:21,440 --> 00:24:22,920 I promise. 434 00:24:23,000 --> 00:24:25,200 Everything's going to be OK. 435 00:24:33,360 --> 00:24:34,600 Thank you. 436 00:24:34,680 --> 00:24:36,440 Thank you for coming. 437 00:24:37,480 --> 00:24:38,760 Thank you. 438 00:24:40,000 --> 00:24:43,640 Dr Wilson? Your daughter let me in. 439 00:24:43,720 --> 00:24:46,840 Call me Zach, please. Everybody does. 440 00:24:46,920 --> 00:24:49,400 It was a lovely service. Thank you. 441 00:24:49,480 --> 00:24:51,720 I'm sure me mother would've said it went on a bit too long, 442 00:24:51,800 --> 00:24:53,960 but then a lot of people said that about her, as well. 443 00:24:54,040 --> 00:24:56,280 How old was she? 93. 444 00:24:56,360 --> 00:24:57,600 Ah, well, 445 00:24:57,680 --> 00:24:59,960 that's a very decent age, even by today's standards. 446 00:25:00,040 --> 00:25:02,320 She was a tough old bird. 447 00:25:02,400 --> 00:25:05,720 Strange being back in here without her. 448 00:25:05,800 --> 00:25:07,560 Sorry, can I, er, offer you a drink? 449 00:25:07,640 --> 00:25:09,560 I'll have a coffee, please, yes. 450 00:25:11,480 --> 00:25:13,800 So, me daughters were telling me you have a Youku channel? 451 00:25:13,880 --> 00:25:19,800 Yes. I do little science videos for children - pretty basic stuff. 452 00:25:19,880 --> 00:25:22,040 And you wanted to interview my mother? 453 00:25:22,120 --> 00:25:24,600 That's right. I wanted to hear in her own words 454 00:25:24,680 --> 00:25:25,840 what she could remember. 455 00:25:25,920 --> 00:25:28,400 She was one of the first people to try your anti-cancer serum 456 00:25:28,480 --> 00:25:29,440 back in '29. 457 00:25:29,520 --> 00:25:31,760 It was a long time ago. Well... 458 00:25:31,840 --> 00:25:32,960 Time is relative, so... 459 00:25:34,200 --> 00:25:36,000 Sugar? Yes, please. 460 00:25:36,080 --> 00:25:38,000 So, you're an actual scientist, then? 461 00:25:38,080 --> 00:25:39,800 You're not an actor in a white coat? 462 00:25:39,880 --> 00:25:42,080 Ha, yes, I do dabble. 463 00:25:42,160 --> 00:25:43,920 In fact, this could've been me, 464 00:25:44,000 --> 00:25:48,400 world-famous Nobel Prize-winner, 465 00:25:48,480 --> 00:25:50,920 but you cheated me out of that, didn't you, Zach? 466 00:25:51,960 --> 00:25:55,440 In another time, we were partners, you and I. 467 00:25:55,520 --> 00:25:59,120 We developed the Wilson-Brann wormhole together. 468 00:25:59,200 --> 00:26:01,600 It was a game-changer. 469 00:26:06,080 --> 00:26:07,280 CHIRPING 470 00:26:08,840 --> 00:26:10,280 It made us billions. 471 00:26:10,360 --> 00:26:13,560 It's gone. It's gone, it's gone, it's gone! 472 00:26:13,640 --> 00:26:15,360 But because, in this timeline, 473 00:26:15,440 --> 00:26:17,680 you never left to study physics in Singapore, 474 00:26:17,760 --> 00:26:19,320 you never came to Cambridge 475 00:26:19,400 --> 00:26:23,280 to research black holes, and so we...never met. 476 00:26:23,360 --> 00:26:25,960 You devoted your life to chemistry, 477 00:26:26,040 --> 00:26:28,240 oncological research. 478 00:26:28,320 --> 00:26:33,080 I ended up doing Youku videos as Dr Brann the Science Man. 479 00:26:33,160 --> 00:26:35,360 I'd like you to leave now, please. 480 00:26:35,440 --> 00:26:39,360 And then, one day, I was clearing out my spam folder 481 00:26:39,440 --> 00:26:40,800 and I found a video message 482 00:26:40,880 --> 00:26:44,320 I had apparently just emailed to myself. 483 00:26:44,400 --> 00:26:46,480 I must've realised that I didn't have long 484 00:26:46,560 --> 00:26:50,560 before that version of my life ceased to exist. 485 00:26:50,640 --> 00:26:52,280 VIDEO: You can go back in time... 486 00:26:52,360 --> 00:26:55,880 I always felt I was living the wrong life. 487 00:26:56,920 --> 00:26:58,920 The life you stole from me... 488 00:26:59,960 --> 00:27:01,400 ..I want it back. 489 00:27:03,640 --> 00:27:06,320 Where is it? What? 490 00:27:06,400 --> 00:27:08,600 The Trans-Temporal-Telegraph. 491 00:27:09,640 --> 00:27:11,560 Our time machine. 492 00:27:11,640 --> 00:27:14,440 The one you used to visit yourself as a boy. 493 00:27:14,520 --> 00:27:16,080 That was just junk. I got rid of it. 494 00:27:16,160 --> 00:27:18,800 I don't believe you. It's true. 495 00:27:18,880 --> 00:27:20,280 Bob was insane. 496 00:27:20,360 --> 00:27:21,920 No. 497 00:27:22,000 --> 00:27:25,520 We're going back, Dr Wilson. 498 00:27:25,600 --> 00:27:28,480 It's time to reset. 499 00:27:28,560 --> 00:27:29,600 No, please. 500 00:27:31,640 --> 00:27:33,920 Please. My mother... Fuck her. 501 00:27:34,920 --> 00:27:37,280 I'm not prepared to be your collateral damage. 502 00:27:44,800 --> 00:27:48,440 Oh, bloody hell... 503 00:27:53,160 --> 00:27:55,240 TYPING 504 00:27:59,760 --> 00:28:00,920 THUD 505 00:28:05,280 --> 00:28:06,480 Oh! 506 00:28:09,440 --> 00:28:11,640 SHE EXHALES SLOWLY