1 00:00:05,000 --> 00:00:07,000 . 2 00:00:07,080 --> 00:00:11,840 No manned submersible has been to the bottom of the Arctic Ocean. 3 00:00:11,920 --> 00:00:15,000 I'm going backwards down a canyon in a submarine. 4 00:00:15,080 --> 00:00:17,880 It's the most complex terrain I've navigated in. 5 00:00:17,960 --> 00:00:21,560 There's something big dead ahead. What is it? 6 00:00:22,560 --> 00:00:26,680 This is pack ice, this can kill ships. 7 00:00:28,600 --> 00:00:30,800 The wind chill is -8. 8 00:00:30,880 --> 00:00:35,000 If you fall in, you have two minutes left. 9 00:00:40,640 --> 00:00:44,600 'Humankind has explored every continent on Earth. 10 00:00:45,680 --> 00:00:48,800 We've climbed its tallest mountains... 11 00:00:50,320 --> 00:00:54,920 ..and even journeyed into space.' Thank you, Mr President. 12 00:00:55,000 --> 00:00:58,200 'But there's a vast swathe of our own planet 13 00:00:58,280 --> 00:01:00,440 that has remained a mystery... 14 00:01:03,720 --> 00:01:05,720 ..the deep ocean. 15 00:01:05,800 --> 00:01:11,040 Stretching down over 35,000 feet into crushing pressures, 16 00:01:11,120 --> 00:01:15,440 it's been nearly impossible to reach until now. 17 00:01:16,880 --> 00:01:21,080 New engineering breakthroughs are driving an audacious global mission - 18 00:01:21,160 --> 00:01:24,560 to dive to the deepest points of all the five oceans 19 00:01:24,640 --> 00:01:28,000 for the first time in history. 20 00:01:28,080 --> 00:01:31,080 These pioneers will push technology to the limit...' 21 00:01:31,160 --> 00:01:34,200 What the hell was that? We have a leaking hatch. 22 00:01:34,280 --> 00:01:38,000 '..to open up this final frontier as never before...' 23 00:01:38,080 --> 00:01:41,880 Trying to mentally put yourself at the bottom is mind-blowing. 24 00:01:41,960 --> 00:01:46,400 '..mapping hidden landscapes, discovering unknown life forms...' 25 00:01:46,480 --> 00:01:48,720 What the eff is that? 26 00:01:48,800 --> 00:01:53,600 '..and unlocking the secrets of how life in the extreme deep ocean 27 00:01:53,680 --> 00:01:55,680 affects our entire planet. 28 00:02:10,200 --> 00:02:15,240 Explorer Victor Vescovo is self-funding a multimillion-dollar 29 00:02:15,320 --> 00:02:19,480 daredevil mission to explore the extremes of the deep.' 30 00:02:19,560 --> 00:02:22,360 70% of this planet is covered in the ocean. 31 00:02:22,440 --> 00:02:26,960 Most of the biomass of the world is not in the Amazonian rainforest 32 00:02:27,040 --> 00:02:30,400 or the jungles of Africa, most of the species on this planet 33 00:02:30,480 --> 00:02:33,560 are in the ocean, yet we still really don't understand 34 00:02:33,640 --> 00:02:35,600 how the ocean works. 35 00:02:36,600 --> 00:02:39,120 'On his pioneering global quest 36 00:02:39,200 --> 00:02:42,320 to dive to the deepest points of all the five oceans, 37 00:02:42,400 --> 00:02:47,960 Victor has conquered the Atlantic, the Southern Ocean, 38 00:02:48,040 --> 00:02:52,120 the Indian Ocean, and the Pacific. 39 00:02:56,200 --> 00:03:01,000 But the success of the entire mission now hangs in the balance.' 40 00:03:01,080 --> 00:03:03,240 You've got to do all five. 41 00:03:03,320 --> 00:03:05,320 Like climbing a mountain - 42 00:03:05,400 --> 00:03:08,480 you can't go all the way up except for the last 100 feet 43 00:03:08,560 --> 00:03:10,560 and say you climbed it. 44 00:03:10,640 --> 00:03:12,120 'Victor will fail 45 00:03:12,200 --> 00:03:16,000 unless he can conquer the coldest of them all, the Arctic. 46 00:03:17,360 --> 00:03:21,840 This treacherous ocean envelops the top of our planet. 47 00:03:21,920 --> 00:03:26,400 In winter, around 80% of it is covered in ice.' 48 00:03:26,480 --> 00:03:29,840 From here, it's only a few hundred miles to the North Pole. 49 00:03:29,920 --> 00:03:34,360 We're about as far north as you can get and still be afloat. 50 00:03:34,440 --> 00:03:36,840 There's going to be a lot of anxiety. 51 00:03:36,920 --> 00:03:41,440 A lot of things can go wrong because of the harsh conditions up here. 52 00:03:41,520 --> 00:03:47,280 'Temperatures here can fall to as low -58 degrees Fahrenheit, 53 00:03:47,360 --> 00:03:51,520 and have claimed the lives of many past explorers.' 54 00:03:54,080 --> 00:03:57,280 This is pack ice, this can kill ships. 55 00:03:58,280 --> 00:04:01,280 The ice up here, it's moving and it grows 56 00:04:01,360 --> 00:04:04,000 and it shrinks, it's an unpredictable beast. 57 00:04:04,080 --> 00:04:09,320 If we wait too long, it can actually move south and cover the drop zone. 58 00:04:10,880 --> 00:04:16,280 'The team's target is 170 miles from the Norwegian island of Svalbard. 59 00:04:16,360 --> 00:04:20,840 It's a depression in the Arctic seabed more than 18,000 feet down, 60 00:04:20,920 --> 00:04:24,280 the Molloy Deep, also known as the Molloy Hole.' 61 00:04:27,040 --> 00:04:29,720 No manned submersible has ever been down 62 00:04:29,800 --> 00:04:32,400 to the bottom of the Arctic Ocean. 63 00:04:34,680 --> 00:04:39,160 So I'll be the first person to actually see the Molloy Deep, 64 00:04:39,240 --> 00:04:42,520 which is always exciting, to be the first. 65 00:04:42,600 --> 00:04:45,920 'The Arctic is not the world's deepest ocean, 66 00:04:46,000 --> 00:04:50,240 but amazingly, the slightly squashed shape of our planet means that 67 00:04:50,320 --> 00:04:53,200 if Victor succeeds in diving to the Molloy Deep, 68 00:04:53,280 --> 00:04:55,960 he will be closer to the centre of the Earth 69 00:04:56,040 --> 00:04:58,440 than anyone has ever gone before. 70 00:05:00,200 --> 00:05:03,040 To succeed, Victor has commissioned 71 00:05:03,120 --> 00:05:06,040 a ground-breaking prototype submersible.' 72 00:05:06,120 --> 00:05:07,760 That's good there, perfect. 73 00:05:07,840 --> 00:05:11,560 The world has never seen a vehicle like this before. 74 00:05:11,640 --> 00:05:13,760 This is the first time that humankind 75 00:05:13,840 --> 00:05:17,800 have had a vehicle that can go to any ocean, any depth, at any time. 76 00:05:17,880 --> 00:05:19,880 This is like a spacecraft. 77 00:05:23,600 --> 00:05:28,120 'The team faced extreme cold in the Southern Ocean, 78 00:05:28,200 --> 00:05:30,760 but the Arctic Ocean is even colder, 79 00:05:30,840 --> 00:05:34,480 and will push the submersible closer to its limits. 80 00:05:34,560 --> 00:05:37,480 Its batteries are particularly vulnerable.' 81 00:05:37,560 --> 00:05:40,800 The water temperature is around -1 Celsius. 82 00:05:40,880 --> 00:05:43,720 We've got six lithium batteries on board. 83 00:05:43,800 --> 00:05:47,560 In the back of your mind, you're thinking, "Will they handle this?" 84 00:05:47,640 --> 00:05:50,520 If we lose one, no big deal - we'll keep going. 85 00:05:50,600 --> 00:05:53,800 You know, you start losing two and three - 86 00:05:55,760 --> 00:05:59,560 'The team have finally reached the Molloy Deep. 87 00:05:59,640 --> 00:06:02,080 There can be just a few weeks a year 88 00:06:02,160 --> 00:06:05,360 when the site is clear enough of ice to dive. 89 00:06:05,440 --> 00:06:09,760 They need to make the most of the Arctic's summer's 24-hour daylight 90 00:06:09,840 --> 00:06:12,240 as they scan for the deepest point.' 91 00:06:12,320 --> 00:06:15,360 We use equipment called a multibeam echo sounder. 92 00:06:15,440 --> 00:06:18,600 We use sound, which we send from the ship to the seabed. 93 00:06:18,680 --> 00:06:23,040 It bounces back up, and that gives us a 3-D model of the seabed. 94 00:06:23,120 --> 00:06:27,840 'To survive, the sub will need to withstand pressures 95 00:06:27,920 --> 00:06:32,200 the equivalent of being crushed by the weight of a cruise ship. 96 00:06:32,280 --> 00:06:35,880 But how will the sub cope with the Arctic extremes? 97 00:06:35,960 --> 00:06:39,760 The team have decided to launch an exploratory dive. 98 00:06:39,840 --> 00:06:42,920 The sonar has detected a promising landing zone 99 00:06:43,000 --> 00:06:45,360 at around half the depth of the ocean, 100 00:06:45,440 --> 00:06:49,480 still a crushing 6,500 feet deep. 101 00:06:49,560 --> 00:06:54,800 It's on the slopes of a giant underwater mountain, or seamount. 102 00:06:54,880 --> 00:06:59,640 It was formed from near-molten rock forced up from under the seabed 103 00:06:59,720 --> 00:07:02,200 around three million years ago. 104 00:07:05,280 --> 00:07:08,200 Biologist Alan Jamieson is hoping that 105 00:07:08,280 --> 00:07:12,240 this pioneering dive might also add to the expedition's growing list 106 00:07:12,320 --> 00:07:15,080 of newly discovered deep-sea species.' 107 00:07:15,160 --> 00:07:18,680 The Molloy Seamount is the size of a big mountain. 108 00:07:18,760 --> 00:07:21,360 There's a rain of organic matter coming down. 109 00:07:21,440 --> 00:07:26,160 We're looking at habitats we think will be covered in life. 110 00:07:26,240 --> 00:07:29,720 'Alan decides to launch lander probes onto the seamount. 111 00:07:29,800 --> 00:07:33,520 Baited cameras and traps will help his search for new species 112 00:07:33,600 --> 00:07:35,880 that have adapted to survive.' 113 00:07:35,960 --> 00:07:37,960 OK, Heather, pull it. 114 00:07:39,400 --> 00:07:41,720 'With the lander probes descending, 115 00:07:41,800 --> 00:07:45,400 it's time to launch the submersible into the icy waters.' 116 00:07:45,480 --> 00:07:47,880 Full speed out. 117 00:07:47,960 --> 00:07:50,320 Go ahead and swing her into the pocket. 118 00:07:50,400 --> 00:07:53,880 All right, we're clear. We're ready. 119 00:07:53,960 --> 00:07:58,160 'Biologist Alan will be joining Victor for this trailblazing dive 120 00:07:58,240 --> 00:08:00,040 onto the seamount.' 121 00:08:00,120 --> 00:08:04,240 Don't fall in. The water temperature is -1. If you fall in, 122 00:08:04,320 --> 00:08:07,400 you have two minutes left, then you're going to drown. 123 00:08:07,480 --> 00:08:11,520 Can somebody put some slack on that line? Roger that. 124 00:08:12,520 --> 00:08:15,000 We'll have to see how this looks, boys. 125 00:08:15,080 --> 00:08:18,120 If he has to swim, it's a cold . 126 00:08:18,200 --> 00:08:20,200 You've got to really be mindful. 127 00:08:20,280 --> 00:08:23,960 We do not want him going in the drink, that's for sure. 128 00:08:38,360 --> 00:08:40,880 'Alan and Victor are safely aboard, 129 00:08:40,960 --> 00:08:44,760 but the launch still has potential dangers for the crew.' 130 00:08:44,840 --> 00:08:48,640 One of the people we'll be most concerned with is our swimmer. 131 00:08:48,720 --> 00:08:51,680 He's exposed to the weather most of all. 132 00:08:51,760 --> 00:08:55,760 My biggest risk is, my hands get cold, and they're not much good. 133 00:08:55,840 --> 00:08:59,760 In the Southern Ocean, our diver almost went hypothermic. 134 00:08:59,840 --> 00:09:02,080 Doctor on standby, he's shaking. 135 00:09:02,160 --> 00:09:05,800 He was exposed for so long in extremely cold water on the surface. 136 00:09:05,880 --> 00:09:09,480 Now we have backup divers, a better launch and recovery system. 137 00:09:09,560 --> 00:09:11,440 The danger is to the personnel 138 00:09:11,520 --> 00:09:14,160 trying to get the sub in and out of the water, 139 00:09:14,240 --> 00:09:16,680 that's where I will be most concerned. 140 00:09:16,760 --> 00:09:19,680 All right, Tim. Down to you, buddy. 141 00:09:21,160 --> 00:09:23,120 Out on the tow. 142 00:09:23,200 --> 00:09:26,600 I want you to go full speed out now, full speed out. 143 00:09:28,280 --> 00:09:31,080 Whoa, whoa! 144 00:09:31,160 --> 00:09:33,960 Hang on, buddy, hang on. 145 00:09:36,280 --> 00:09:39,520 All stop. Don't watch my hand, you come on. 146 00:09:39,600 --> 00:09:42,920 Down on the main, here we go. OK, Victor, you're away. 147 00:09:43,000 --> 00:09:46,080 Sub's away, thrusters are isolated. 148 00:09:47,400 --> 00:09:50,720 He's getting his ass kicked out there. 149 00:09:50,800 --> 00:09:54,800 Whoa. Release, release, release. 150 00:10:00,000 --> 00:10:02,000 Hang on, Timmy. Damn! 151 00:10:04,840 --> 00:10:06,840 Released! 152 00:10:06,920 --> 00:10:09,720 I can't see it, so hopefully, it's clear. 153 00:10:11,160 --> 00:10:14,400 Sub is off the tow line. Roger that. 154 00:10:21,960 --> 00:10:23,440 Tim? 155 00:10:28,480 --> 00:10:30,720 Tim? You OK, Tim? 156 00:10:36,120 --> 00:10:38,120 You OK, man? 157 00:10:41,840 --> 00:10:45,960 Kelvin, we have the handrails, we have the swimmer, you're good to go. 158 00:10:46,040 --> 00:10:48,560 Roger that. LF, LF, this is SO. 159 00:10:48,640 --> 00:10:53,200 You're clear to start your dive. Roger that. Enabling thrusters. 160 00:10:56,440 --> 00:10:58,760 'As they begin their descent, 161 00:10:58,840 --> 00:11:01,760 Victor and Alan pass thing sunlight zone. 162 00:11:01,840 --> 00:11:05,200 In the long Arctic summer, the sun won't set on these waters 163 00:11:05,280 --> 00:11:06,760 for four months. 164 00:11:06,840 --> 00:11:12,160 They're home to the acrobat of the ocean, the humpback whale. 165 00:11:12,240 --> 00:11:15,440 These Arctic giants come to feed on the tiny zooplankton 166 00:11:15,520 --> 00:11:22,120 that swarm when the sea ice melts, eating up to 5,500lbs of them a day. 167 00:11:27,840 --> 00:11:33,440 Descending past 600 feet, they enter the twilight zone. 168 00:11:33,520 --> 00:11:37,600 It's home to the graceful sea angel, a type of sea slug. 169 00:11:37,680 --> 00:11:40,680 Its foot has evolved into winglike fins. 170 00:11:42,360 --> 00:11:45,560 And there are visitors from above. 171 00:11:45,640 --> 00:11:50,400 The narwhal. The males have a distinctive, long tusk - 172 00:11:50,480 --> 00:11:54,440 an extended canine tooth which they use to sense prey. 173 00:11:54,520 --> 00:11:57,600 Diving as deep as 4,900 feet, 174 00:11:57,680 --> 00:12:00,880 they can stay submerged for 25 minutes at a time. 175 00:12:04,640 --> 00:12:07,960 Finally, almost an hour after leaving the surface, 176 00:12:08,040 --> 00:12:12,080 Victor and Alan reach the slopes of the underwater mountain. 177 00:12:12,160 --> 00:12:16,960 6,500 feet of water is now crushing them.' 178 00:12:17,040 --> 00:12:18,840 Very rocky. 179 00:12:18,920 --> 00:12:21,560 Approach with caution. 180 00:12:24,320 --> 00:12:29,400 We're going to go down the canyon. Cliff diving, submarine-style. 181 00:12:29,480 --> 00:12:32,280 'Birthed from the fiery depths of our planet, 182 00:12:32,360 --> 00:12:36,600 the seamount's surface is scarred with canyons and sharp ridges. 183 00:12:36,680 --> 00:12:41,680 Could unknown life forms be lurking in this alien landscape?' 184 00:12:41,760 --> 00:12:44,840 Animals living all the way down these cliff faces. 185 00:12:44,920 --> 00:12:47,600 It's just incredibly complex. 186 00:12:47,680 --> 00:12:49,920 It's steep here. Yeah. 187 00:12:51,320 --> 00:12:56,240 The current is pushing me forward. You feel how strong it is? Yeah. 188 00:12:56,320 --> 00:12:58,680 Wow. 189 00:12:58,760 --> 00:13:01,440 What is that? 190 00:13:02,920 --> 00:13:05,520 Whoa - up, up, up. 191 00:13:05,600 --> 00:13:07,960 Up, up, up. 192 00:13:13,640 --> 00:13:18,640 LF, confirm you read my last transmission. 193 00:13:25,200 --> 00:13:29,680 Surface, life support good. 194 00:13:29,760 --> 00:13:33,080 Life support, OK - loud and clear. 195 00:13:34,880 --> 00:13:37,560 It just came out of the sediment cloud. 196 00:13:37,640 --> 00:13:40,440 This current is pushing me all over the place. 197 00:13:40,520 --> 00:13:42,800 Whoa, whoa. 198 00:13:42,880 --> 00:13:46,360 Is it spinning us? Yeah, spinning us up. 199 00:13:46,440 --> 00:13:51,080 Pushing us. We're going backwards down a canyon 200 00:13:51,160 --> 00:13:53,840 in a submarine in the Arctic Ocean. 201 00:13:57,200 --> 00:14:00,040 Whoa! 202 00:14:00,120 --> 00:14:02,400 What the 's going on? 203 00:14:02,480 --> 00:14:06,200 It keeps pushing me into the wall, yeah. Really? 204 00:14:06,280 --> 00:14:08,680 We're going down. 205 00:14:13,600 --> 00:14:17,760 This is easily the most complex terrain I've ever navigated. 206 00:14:22,000 --> 00:14:24,960 It's getting weirder and weirder. 207 00:14:25,040 --> 00:14:27,440 We're stuck on the bottom. What is this? 208 00:14:27,520 --> 00:14:29,520 Yeah, what is this stuff? 209 00:14:29,600 --> 00:14:34,360 There's loads of sea lilies everywhere, wonderful white sponges, 210 00:14:34,440 --> 00:14:37,200 a whole bunch of prawns down here, 211 00:14:37,280 --> 00:14:40,280 there are urchins, sea stars buried in here. 212 00:14:40,360 --> 00:14:44,520 'Meanwhile 2,000 feet away, one of the lander probes 213 00:14:44,600 --> 00:14:50,280 is capturing some extraordinary cold-water specialists - eelpouts.' 214 00:14:50,360 --> 00:14:53,000 They're quite aggressive. 215 00:14:53,080 --> 00:14:57,880 When they get close to one another, they'll have an altercation, 216 00:14:57,960 --> 00:15:00,360 and they'll go and reposition. 217 00:15:02,240 --> 00:15:05,720 These are not a species you find outside of the Arctic, 218 00:15:05,800 --> 00:15:09,360 these are very much a polar, deep-sea species. 219 00:15:13,520 --> 00:15:17,080 'The cold is sapping the submersible's power, 220 00:15:17,160 --> 00:15:20,240 but the batteries have shown that they can survive 221 00:15:20,320 --> 00:15:22,640 the Arctic's extreme temperatures. 222 00:15:22,720 --> 00:15:26,200 It's time for Victor and Alan to head to the surface.' 223 00:15:26,280 --> 00:15:30,760 I guess that's us. That was cool. Three-and-a-half hours. 224 00:15:30,840 --> 00:15:32,880 Surface, this is LF ascending. 225 00:15:41,720 --> 00:15:44,120 Great job, guys. 226 00:15:44,200 --> 00:15:45,680 How was it? Crazy. 227 00:15:45,760 --> 00:15:50,160 We went down a 200m wall backwards cos it was so steep. 228 00:15:50,240 --> 00:15:53,840 The current pushed us up against a wall, so we ended up - 229 00:15:53,920 --> 00:15:57,000 We saw a lot of strange stuff. 230 00:15:57,080 --> 00:15:59,560 We went all the way down to minimal power. 231 00:15:59,640 --> 00:16:04,000 I came up with half my batteries, three were dead. It was cold water. 232 00:16:04,080 --> 00:16:06,480 All right, time to go get warm. 233 00:16:08,760 --> 00:16:12,800 'Victor and Alan found an ocean floor teeming with life forms. 234 00:16:12,880 --> 00:16:17,560 They've evolved to survive in the Arctic depths over millions of years. 235 00:16:19,520 --> 00:16:22,160 The team have some secret weapons 236 00:16:22,240 --> 00:16:25,160 in their quest to uncover the ocean's mysteries.' 237 00:16:25,240 --> 00:16:27,880 Landers are critical to our mission. 238 00:16:27,960 --> 00:16:31,480 They provide a number of major functions. 239 00:16:33,320 --> 00:16:37,240 The first is that they're used for communication 240 00:16:37,320 --> 00:16:40,440 and for navigation of the submersible. 241 00:16:40,520 --> 00:16:44,880 The second is that they're used as camera and lighting platforms 242 00:16:44,960 --> 00:16:47,240 to collect biological data. 243 00:16:49,800 --> 00:16:51,280 Finally, they're used 244 00:16:51,360 --> 00:16:56,600 to bring anything that we might want to collect back up to the surface. 245 00:16:59,320 --> 00:17:02,840 'What scientific treasures have the lander probes 246 00:17:02,920 --> 00:17:05,040 brought up from the Arctic deep? 247 00:17:12,000 --> 00:17:16,560 These amphipods play a vital role on the Arctic Ocean floor.' 248 00:17:16,640 --> 00:17:18,560 Amphipods are scavengers, 249 00:17:18,640 --> 00:17:21,920 they eat pretty much anything that falls from the surface. 250 00:17:22,000 --> 00:17:24,480 You have production events on the surface - 251 00:17:24,560 --> 00:17:28,560 whales and dolphins, squid, jellyfish, even plankton - 252 00:17:28,640 --> 00:17:31,680 organic stuff sinks to the seafloor. 253 00:17:31,760 --> 00:17:34,560 Often, amphipods will be the first animal 254 00:17:34,640 --> 00:17:36,920 to intercept that and consume it. 255 00:17:37,000 --> 00:17:41,360 They turn it into lipid, which is basically fat, 256 00:17:41,440 --> 00:17:43,080 very, very quickly, 257 00:17:43,160 --> 00:17:46,960 then they become high-value prey items to larger animals. 258 00:17:47,040 --> 00:17:52,000 So they might look small and not altogether that impressive, 259 00:17:52,080 --> 00:17:57,080 but actually, scientifically, they are very, very interesting. 260 00:17:57,160 --> 00:17:59,880 Species like this are great to work with 261 00:17:59,960 --> 00:18:03,680 because they're so widespread geographically. 262 00:18:03,760 --> 00:18:09,680 In terms of planet colonisers, that's pretty amazing. 263 00:18:09,760 --> 00:18:13,920 I don't think there's anything in the terrestrial world 264 00:18:14,000 --> 00:18:17,440 that has anything like that kind of footprint. 265 00:18:17,520 --> 00:18:20,840 That's completely different - I have no idea what that is. 266 00:18:20,920 --> 00:18:23,200 That must be an Arctic thing. 267 00:18:23,280 --> 00:18:25,960 I've never seen anything like that. 268 00:18:28,760 --> 00:18:31,920 It's very unusual - that massive antenna, 269 00:18:32,000 --> 00:18:34,160 I've never seen that before. 270 00:18:34,240 --> 00:18:37,200 'And the landers have another surprise. 271 00:18:37,280 --> 00:18:41,080 One of their traps has caught some of the Arctic eelpouts 272 00:18:41,160 --> 00:18:43,200 seen on the underwater cameras.' 273 00:18:43,280 --> 00:18:47,360 The head is kind of transparent, you can see the skull. 274 00:18:47,440 --> 00:18:49,760 These live in perpetual darkness 275 00:18:49,840 --> 00:18:53,400 but they still have eyes because there's biological light - 276 00:18:53,480 --> 00:18:55,760 animals that communicate using light. 277 00:18:55,840 --> 00:18:59,880 They can't see red or green or yellow, they just see blue. 278 00:18:59,960 --> 00:19:02,080 They have this slime on their body. 279 00:19:02,160 --> 00:19:06,160 If you notice, their body, it's that light-brown colour, 280 00:19:06,240 --> 00:19:08,840 but around this area here, it's darker. 281 00:19:08,920 --> 00:19:11,880 That's darker because that's where its stomach is. 282 00:19:11,960 --> 00:19:15,920 That means they probably eat something which bioluminesces - 283 00:19:16,000 --> 00:19:18,960 one of their prey items produces light. 284 00:19:19,040 --> 00:19:22,800 The last thing you want to do, when you're being sneaky in the dark, 285 00:19:22,880 --> 00:19:25,840 is to eat something which glows, cos then you glow. 286 00:19:25,920 --> 00:19:30,280 That's something gelatinous and soft-bodied fish do a lot of 287 00:19:30,360 --> 00:19:33,560 because otherwise they would glow like a light bulb. 288 00:19:33,640 --> 00:19:36,240 The animal itself is quite transparent, 289 00:19:36,320 --> 00:19:38,880 but its stomach has been blacked out 290 00:19:38,960 --> 00:19:42,720 to stop it becoming prey itself to something bigger. 291 00:19:42,800 --> 00:19:49,560 Conditions today are good, but out to the east here, we can expect 292 00:19:49,640 --> 00:19:53,280 5.5 metres, or 20ft seas. 293 00:19:54,720 --> 00:19:59,280 The colour of the diagram shows the wind chill is -8. 294 00:20:00,400 --> 00:20:04,840 So we can expect up to 45, 50 knots. 295 00:20:04,920 --> 00:20:10,640 This part of the world is notorious for rough seas, strong winds. 296 00:20:11,640 --> 00:20:15,680 We just have to be extravigilant, extracareful, 297 00:20:15,760 --> 00:20:18,080 and keep an eye on conditions. 298 00:20:18,160 --> 00:20:22,120 We'll have to condense the diving that we have planned 299 00:20:22,200 --> 00:20:25,000 into a much shorter timeframe. 300 00:20:25,080 --> 00:20:28,840 'Stormy conditions would make launching or recovering the sub 301 00:20:28,920 --> 00:20:30,520 extremely dangerous. 302 00:20:30,600 --> 00:20:34,880 It could also set the unpredictable pack ice on the move. 303 00:20:37,200 --> 00:20:39,760 With the weather holding for now, 304 00:20:39,840 --> 00:20:42,520 the sonar team have detected a strange signal 305 00:20:42,600 --> 00:20:47,840 which could point to an unusual geological feature on the seamount.' 306 00:20:47,920 --> 00:20:50,000 It could be something. 307 00:20:50,080 --> 00:20:53,040 The data that we're looking at from the sonar, 308 00:20:53,120 --> 00:20:55,440 it does show a diffuse cloud, 309 00:20:55,520 --> 00:21:00,080 something erupting on the seabed down there, a vent system. 310 00:21:01,400 --> 00:21:04,840 'Finding the vents could give geologists new insight 311 00:21:04,920 --> 00:21:08,320 into how the Arctic Ocean seabed is being formed.' 312 00:21:08,400 --> 00:21:11,960 It would be such a huge find, to find it. 313 00:21:12,040 --> 00:21:15,120 'It's an opportunity they can't afford to miss.' 314 00:21:15,200 --> 00:21:17,200 Really unusual vent features. 315 00:21:17,280 --> 00:21:20,960 They've never been documented in this area, but indications are 316 00:21:21,040 --> 00:21:24,720 that we'd be able to find them, and that would be a first. 317 00:21:24,800 --> 00:21:27,720 'The sub could now face a new threat - 318 00:21:27,800 --> 00:21:30,400 the Arctic may be the world's coldest ocean, 319 00:21:30,480 --> 00:21:35,240 but the water coming out of the vents could be dangerously hot.' 320 00:21:35,320 --> 00:21:40,360 We're looking at temperatures of erupting fluids of about 90 degrees. 321 00:21:40,440 --> 00:21:43,560 Even 90 degrees C is problematic. 322 00:21:48,400 --> 00:21:50,920 'On the hunt for undersea vents, 323 00:21:51,000 --> 00:21:54,360 the sub could be exposed to dangerously hot water. 324 00:21:54,440 --> 00:21:55,920 The team knows that 325 00:21:56,000 --> 00:21:59,080 the sub's spherical cockpit has potential weak points 326 00:21:59,160 --> 00:22:01,160 that could be vulnerable.' 327 00:22:01,240 --> 00:22:04,640 Hydrothermal vents are about 90 degrees Celsius. 328 00:22:04,720 --> 00:22:08,680 The acrylic viewports would be the thing you'd be concerned about. 329 00:22:08,760 --> 00:22:12,640 The design of the vehicle is based around water temperatures 330 00:22:12,720 --> 00:22:16,160 not being more than 10 Celsius at that sort of depth. 331 00:22:16,240 --> 00:22:19,560 'If the acrylic viewports are melted by the hot vents, 332 00:22:19,640 --> 00:22:23,280 the superhigh-pressure water will enter the sub 333 00:22:23,360 --> 00:22:25,520 and fill it in a millisecond. 334 00:22:25,600 --> 00:22:27,320 To avoid dropping the sub 335 00:22:27,400 --> 00:22:31,120 directly onto potentially damaging hot-water vents, 336 00:22:31,200 --> 00:22:35,160 the team select a landing zone a safe distance away. 337 00:22:36,240 --> 00:22:39,880 Victor will then need to navigate across the precipitous slopes 338 00:22:39,960 --> 00:22:42,320 of the seamount to his target.' 339 00:22:45,400 --> 00:22:47,080 OK, here we go. 340 00:22:47,160 --> 00:22:50,800 'Heather is joining Victor for this 8,200-foot dive 341 00:22:50,880 --> 00:22:53,560 to hunt for the vents.' 342 00:22:53,640 --> 00:22:55,520 I'm so excited! 343 00:22:55,600 --> 00:22:59,680 'She will become the first woman to descend to the Arctic deeps.' 344 00:22:59,760 --> 00:23:03,120 Hatch is good, life support running. I have a green board. 345 00:23:03,200 --> 00:23:05,000 Roger that, here we go. 346 00:23:09,720 --> 00:23:12,320 God, we're almost at 400 already! 347 00:23:12,400 --> 00:23:17,080 We're below the crush depth of most military submarines. Yes! 348 00:23:26,520 --> 00:23:28,480 Oh, gosh! 349 00:23:28,560 --> 00:23:32,640 It's never done that. That's a bad seal or something. 350 00:23:33,720 --> 00:23:36,520 That's way too much. 351 00:23:36,600 --> 00:23:40,120 Surface, LF. We've got dripping coming from the hatch. 352 00:23:40,200 --> 00:23:44,480 The main hatch? Hatch vent. I repeat - hatch vent. 353 00:23:50,640 --> 00:23:52,720 I'm calling an abort. 354 00:23:52,800 --> 00:23:56,240 Dropping VBTs and surfacing weight, returning to surface. 355 00:23:56,320 --> 00:24:00,040 I understand - dropping VBTs and surfacing weight. 356 00:24:01,280 --> 00:24:03,280 I'm not pleased. 357 00:24:04,280 --> 00:24:06,280 We need to rally our troops. 358 00:24:06,360 --> 00:24:10,600 Can you go into the lounge and let everybody know? Rig for recovery. 359 00:24:10,680 --> 00:24:13,720 Disappointing that he's coming back up. 360 00:24:13,800 --> 00:24:16,400 We'll go to the recovery, have a look. 361 00:24:16,480 --> 00:24:20,200 Maybe there's something in there, I don't know. 362 00:24:22,240 --> 00:24:24,760 I'm going to shift my gear off, 363 00:24:24,840 --> 00:24:27,840 jump up there and pull that vent out right away. 364 00:24:27,920 --> 00:24:32,080 'With the approaching Arctic storm threatening to curtail the mission, 365 00:24:32,160 --> 00:24:35,360 sub engineer Kelvin is under pressure to get the sub fixed 366 00:24:35,440 --> 00:24:38,480 and back in the water as soon as possible. 367 00:24:40,080 --> 00:24:42,640 The sub won't be able to dive again 368 00:24:42,720 --> 00:24:45,480 unless Kelvin can fix the hatch vent.' 369 00:24:45,560 --> 00:24:48,160 This is where the leak was coming through. 370 00:24:48,240 --> 00:24:53,200 We think the shaft might have been bent a little bit, which it is. 371 00:24:53,280 --> 00:24:56,520 We're just going to try and straighten it out. 372 00:24:56,600 --> 00:24:59,880 I don't know whether it was dripping a little or a lot. 373 00:24:59,960 --> 00:25:03,120 'With such a precisely engineered component, 374 00:25:03,200 --> 00:25:06,560 there's only so much Kelvin can do in the ship's workshop.' 375 00:25:06,640 --> 00:25:10,120 It's not going to straighten up in there, there's a variance. 376 00:25:10,200 --> 00:25:13,360 'Has Kelvin done enough to make the hatch vent seal?' 377 00:25:13,440 --> 00:25:18,280 A little bit of backyard mechanicking. 378 00:25:23,120 --> 00:25:26,560 Patrick, that felt really good. All right, Kelvin. 379 00:25:26,640 --> 00:25:28,360 That's all we can do. 380 00:25:28,440 --> 00:25:31,000 'With a turnaround of just over two hours, 381 00:25:31,080 --> 00:25:35,920 the team can now launch again to search for the underwater vents.' 382 00:25:36,000 --> 00:25:39,440 Let's hope like hell that hatch vent works. 383 00:25:39,520 --> 00:25:43,480 Round two. If at first you don't succeed - 384 00:25:43,560 --> 00:25:45,640 Good luck, have a good dive. 385 00:25:47,200 --> 00:25:49,960 OK, bridge, we're going to go for a launch. 386 00:25:50,040 --> 00:25:52,960 Copy that, you are good to go. We are pumping in. 387 00:25:53,040 --> 00:25:55,960 Roger that, you're good to pump. Pumping. 388 00:26:01,720 --> 00:26:06,000 That hatch is looking damn solid now, I'm much happier. 389 00:26:06,080 --> 00:26:08,560 Surface, hatch is good. 390 00:26:08,640 --> 00:26:10,640 Good to hear. Thanks, Victor. 391 00:26:10,720 --> 00:26:13,040 Kelvin will be happy. 392 00:26:13,120 --> 00:26:15,440 That was it, Magee. Yeah! 393 00:26:15,520 --> 00:26:17,640 'After 25 minutes of descending, 394 00:26:17,720 --> 00:26:20,560 Victor and Heather reach the midnight zone. 395 00:26:20,640 --> 00:26:25,640 Only 1% of sunlight penetrates the 3,000 feet of water above them. 396 00:26:25,720 --> 00:26:28,160 Temperatures this deep are below 0. 397 00:26:28,240 --> 00:26:32,320 It's only the salt in the water that keeps it from freezing.' 398 00:26:32,400 --> 00:26:37,600 Surface, LF. Present depth, 1-niner-2-1. 399 00:26:37,680 --> 00:26:42,200 Heading 0-2-2. Life support, good. 400 00:26:42,280 --> 00:26:47,200 'This is the domain of the mysterious Greenland shark. 401 00:26:47,280 --> 00:26:48,760 Growing to 21 feet, 402 00:26:48,840 --> 00:26:52,920 it has one of the longest lifespans of any animal on earth - 403 00:26:53,000 --> 00:26:56,520 it can live a staggering 500 years. 404 00:26:56,600 --> 00:27:01,720 Some alive today may have been born before the voyage of the Mayflower.' 405 00:27:03,840 --> 00:27:05,360 Here we come. 406 00:27:09,520 --> 00:27:11,000 Touchdown. 407 00:27:14,240 --> 00:27:20,040 You're getting excited, you're using more oxygen. Am I? Sorry. 408 00:27:20,120 --> 00:27:25,080 It's true. I saw the oxygen spiked up since we got to the bottom. 409 00:27:27,920 --> 00:27:30,000 Look how sharp it is down there. 410 00:27:31,000 --> 00:27:33,760 All these rocks look really dark and basaltic. 411 00:27:33,840 --> 00:27:36,240 There's another big basalt rock coming. 412 00:27:36,320 --> 00:27:38,920 'Basalt is formed from solidified lava 413 00:27:39,000 --> 00:27:42,160 which erupts as the bedrock pulls apart. 414 00:27:42,240 --> 00:27:45,080 Could this be a sign that the hydrothermal vents, 415 00:27:45,160 --> 00:27:48,440 with their potentially dangerous hot water, are close?' 416 00:27:48,520 --> 00:27:51,440 Pretty big boulders off to your left. 417 00:27:53,640 --> 00:27:57,480 Boulders the size of cars scattered all over here. 418 00:27:57,560 --> 00:28:00,240 Looks like something quite large coming up, 419 00:28:00,320 --> 00:28:03,320 you might want to lift up a little bit. 420 00:28:06,040 --> 00:28:10,280 Definitely something very big. Something big dead ahead. 421 00:28:10,360 --> 00:28:12,360 What is it? I can't see. 422 00:28:14,160 --> 00:28:16,160 Wow. 423 00:28:16,240 --> 00:28:21,200 '6,200 feet down, the sub has run up against a huge obstacle.' 424 00:28:21,280 --> 00:28:25,720 I don't even know how high that is. Yep, no idea. 425 00:28:25,800 --> 00:28:28,520 That is massive. Right in our way. 426 00:28:28,600 --> 00:28:30,960 We're going up a really sharp incline. 427 00:28:31,040 --> 00:28:33,440 Looks near vertical now. 428 00:28:33,520 --> 00:28:35,840 Wow. Jeez! 429 00:28:35,920 --> 00:28:40,240 It's pushing me backwards, it's pushing me down the slope. 430 00:28:40,320 --> 00:28:43,200 I need you to help me out here. Yeah. 431 00:28:43,280 --> 00:28:47,560 This is pretty dynamic. Coming up quick on this side. 432 00:28:51,160 --> 00:28:53,200 Whoa! 433 00:28:55,160 --> 00:28:58,960 Where did he come from? That happens, once in a while. 434 00:29:00,320 --> 00:29:04,160 I'm totally going into that big, black, open area. 435 00:29:04,240 --> 00:29:07,800 Ho-ho! Why don't you drop off on that side? 436 00:29:10,400 --> 00:29:11,800 Wow. 437 00:29:16,240 --> 00:29:19,760 Like space exploration, huh? Yeah. 438 00:29:19,840 --> 00:29:21,840 Like a different planet. 439 00:29:23,520 --> 00:29:27,760 Those nodules on the bottom, are those critters? 440 00:29:27,840 --> 00:29:31,960 Those are interesting. Oh, yeah, yeah. 441 00:29:32,040 --> 00:29:34,280 Very different to what we were seeing 442 00:29:34,360 --> 00:29:37,240 coming up the steeper sections there. 443 00:29:38,480 --> 00:29:41,840 We've got some stuff coming up, look at the centre. 444 00:29:41,920 --> 00:29:43,600 Oh, yeah. 445 00:29:43,680 --> 00:29:47,800 Which is interesting, because this is all flat sediment. Yeah. 446 00:29:47,880 --> 00:29:51,640 Yet we've got a big God-knows-what coming up. 447 00:29:54,120 --> 00:29:56,320 This is different. 448 00:29:56,400 --> 00:29:59,800 It's undulating, like we're on the top of a mesa. 449 00:29:59,880 --> 00:30:02,600 Look at this. That's a hard crust. 450 00:30:02,680 --> 00:30:06,720 I've never seen that. A hard crust of some sort. 451 00:30:09,120 --> 00:30:10,920 Oh, my God. See? Look. 452 00:30:11,000 --> 00:30:14,760 I was just... Yeah. There's a tunnel! 453 00:30:14,840 --> 00:30:16,840 How does that happen? 454 00:30:16,920 --> 00:30:20,120 'The crust that we're seeing is 455 00:30:20,200 --> 00:30:23,120 showing us that there's fluids coming up. 456 00:30:23,200 --> 00:30:25,160 It's depositing the minerals 457 00:30:25,240 --> 00:30:28,600 and gluing together the softer seafloor sediment, 458 00:30:28,680 --> 00:30:30,880 and forming this hard crust.' 459 00:30:30,960 --> 00:30:34,600 'This new evidence for fluid emerging from the Arctic seafloor 460 00:30:34,680 --> 00:30:37,000 is a groundbreaking find, 461 00:30:37,080 --> 00:30:40,920 a secret, dynamic landscape revealed in the Arctic deep.' 462 00:30:41,000 --> 00:30:43,000 There's another one. 463 00:30:43,080 --> 00:30:45,080 Oh, wow! 464 00:30:49,320 --> 00:30:51,480 There it is! 465 00:30:51,560 --> 00:30:53,800 She's pretty happy. 466 00:30:55,680 --> 00:30:58,800 How was that? Thanks, guys. Just amazing. 467 00:31:02,160 --> 00:31:05,280 I'm glad we finally got you down. Yeah. 468 00:31:05,360 --> 00:31:07,520 'Victor heads to the sonar room 469 00:31:07,600 --> 00:31:11,200 to discover if there's news of the team's quest 470 00:31:11,280 --> 00:31:13,560 to find the deepest point in the Arctic, 471 00:31:13,640 --> 00:31:16,720 the final goal of his global Five Deeps mission.' 472 00:31:16,800 --> 00:31:20,360 We identified this area to be the deepest, we'll dive here. 473 00:31:20,440 --> 00:31:22,840 We have a lander on the deepest spot. 474 00:31:22,920 --> 00:31:25,120 That's it, right here. 475 00:31:27,440 --> 00:31:31,360 'Victor's target is in the shadow of the seamount, 476 00:31:31,440 --> 00:31:33,840 more than three miles down.' 477 00:31:33,920 --> 00:31:40,000 This is the first time that anybody has dived at this site. 478 00:31:40,080 --> 00:31:44,840 That makes it exciting, but it also means you have to be careful. 479 00:31:46,120 --> 00:31:50,160 'The sub's systems will need to survive in the Arctic danger zone 480 00:31:50,240 --> 00:31:51,960 for more than seven hours.' 481 00:31:52,040 --> 00:31:53,800 She looks clean. 482 00:31:53,880 --> 00:31:56,840 It's going to be the coldest dive, no doubt. 483 00:31:56,920 --> 00:31:59,800 That'll add a lot of stress to the submersible, 484 00:31:59,880 --> 00:32:02,480 to the electronics, the sphere, everything. 485 00:32:02,560 --> 00:32:05,560 'With the team preparing for the deep dive, 486 00:32:05,640 --> 00:32:07,440 the weather window is closing.' 487 00:32:07,520 --> 00:32:10,600 I think the weather is going to turn on us, 488 00:32:10,680 --> 00:32:12,680 so it's going to be a push. 489 00:32:12,760 --> 00:32:17,000 We want to get that dive done, but we're fighting weather again. 490 00:32:17,080 --> 00:32:20,800 The low-pressure system which is forming south of us 491 00:32:20,880 --> 00:32:23,800 is throwing weather up towards us. 492 00:32:23,880 --> 00:32:26,880 That's going to push the pack ice onto the dive site. 493 00:32:26,960 --> 00:32:30,160 'The team must launch as soon as possible. 494 00:32:30,240 --> 00:32:35,400 Everything hinges on this crucial dive to the last of the Five Deeps. 495 00:32:35,480 --> 00:32:39,600 This is Victor's chance to mark a new chapter in human history, 496 00:32:39,680 --> 00:32:42,760 as the first person to reach the deepest point 497 00:32:42,840 --> 00:32:45,040 of all the world's five oceans.' 498 00:32:45,120 --> 00:32:47,840 The last push to get across the finish line. 499 00:32:47,920 --> 00:32:51,040 It's so tantalisingly close, yet we're not there. 500 00:32:52,600 --> 00:32:55,320 OK, Victor, your chariot awaits. 501 00:32:55,400 --> 00:32:56,920 Nice one, buddy. 502 00:32:57,000 --> 00:32:59,000 Thank you. 503 00:32:59,080 --> 00:33:02,320 Number five, let's do this. One more! 504 00:33:02,400 --> 00:33:04,400 Let's do it. 505 00:33:04,480 --> 00:33:07,760 All right, Kelvin - put him in and bring him back safe. 506 00:33:07,840 --> 00:33:10,240 You betcha. 507 00:33:10,320 --> 00:33:12,960 It will get colder, I have no doubt. 508 00:33:13,040 --> 00:33:16,840 You're clear to start pumping. Roger that. I have a green board. 509 00:33:16,920 --> 00:33:21,280 'It will take Victor more than 2.5 hours to reach the bottom.' 510 00:33:25,680 --> 00:33:28,280 There she goes. 511 00:33:28,360 --> 00:33:31,840 'The lander probe CLOSP has been dropped on the deepest point 512 00:33:31,920 --> 00:33:34,240 identified by the sonar team. 513 00:33:35,680 --> 00:33:39,320 Victor will need to navigate across the seabed to CLOSP 514 00:33:39,400 --> 00:33:42,400 to complete his Five Deeps mission.' 515 00:33:42,480 --> 00:33:47,040 25 metres already. This machine goes down the water column pretty fast. 516 00:33:47,120 --> 00:33:48,960 Wow, this is exciting. 517 00:33:49,040 --> 00:33:52,680 Last of the Five Deeps, such a long journey. 518 00:33:55,760 --> 00:33:59,720 I'm in the deep, dark, black ocean. 519 00:34:06,880 --> 00:34:08,560 A little crack here and there. 520 00:34:08,640 --> 00:34:11,240 It's just the outside of the submersible 521 00:34:11,320 --> 00:34:14,360 getting used to the pressure. 522 00:34:14,440 --> 00:34:16,760 That's always a little alarming. 523 00:34:16,840 --> 00:34:19,960 The temperature is dropping despite the heater. 524 00:34:20,040 --> 00:34:26,520 Surface, LF. Present depth - 3-3-0-0. Life support good. 525 00:34:26,600 --> 00:34:28,760 Roger, LF, loud and clear. 526 00:34:28,840 --> 00:34:30,360 Roger. 527 00:34:31,400 --> 00:34:34,960 Definitely two thirds of the way down. 528 00:34:35,040 --> 00:34:36,960 Getting close, wow. 529 00:34:37,040 --> 00:34:39,720 'The pressure squeezing the sub has increased 530 00:34:39,800 --> 00:34:43,400 to a staggering 30,700 tons. 531 00:34:43,480 --> 00:34:48,560 There's the equivalent of 1,031 storeys of water above him - 532 00:34:48,640 --> 00:34:52,760 ten Empire State Buildings stood on top of each other.' 533 00:34:52,840 --> 00:34:56,720 Getting a little drop of water from the hatch vent. 534 00:35:05,280 --> 00:35:09,440 It should seal with the higher pressure, to be honest. 535 00:35:33,000 --> 00:35:37,480 'Victor Vescovo is diving to the bottom of the Arctic Ocean, 536 00:35:37,560 --> 00:35:41,040 but now water is finding its way through the hatch vent. 537 00:35:41,120 --> 00:35:43,960 As Victor descends further, 538 00:35:44,040 --> 00:35:47,840 the sub is squeezed by the immense water pressure. 539 00:35:47,920 --> 00:35:51,880 Amazingly, this begins to plug the hole.' 540 00:35:51,960 --> 00:35:55,400 That's pretty much stopped, that's good. 541 00:35:55,480 --> 00:35:59,800 I'm not concerned, that is not an abort condition. 542 00:36:01,600 --> 00:36:05,480 'Two hours into his descent, at 13,000 feet, 543 00:36:05,560 --> 00:36:10,840 Victor enters the abyssal zone, the deepest part of the Arctic Ocean, 544 00:36:10,920 --> 00:36:16,040 and home to an Arctic variety of the deepest-living octopus, 545 00:36:16,120 --> 00:36:18,120 the bizarre dumbo. 546 00:36:19,520 --> 00:36:23,400 While most octopuses swim using jets of water, 547 00:36:23,480 --> 00:36:27,920 the 9"-long dumbo propels itself with its earlike fins.' 548 00:36:33,920 --> 00:36:35,960 There it is - 5,000 metres. 549 00:36:37,160 --> 00:36:40,600 Oh, my goodness, this is getting exciting. 550 00:36:40,680 --> 00:36:42,640 So close. 551 00:36:42,720 --> 00:36:45,960 All external lights are on. 552 00:36:46,040 --> 00:36:48,440 Sonar is on. 553 00:36:50,720 --> 00:36:56,360 143 metres off the bottom in the last of the Five Deeps. 554 00:36:58,720 --> 00:37:01,560 Here we go, we're getting close. 555 00:37:02,680 --> 00:37:06,400 Oh, my goodness. We should start to see it very soon. 556 00:37:17,160 --> 00:37:20,040 I'm at the bottom of the Arctic Ocean. 557 00:37:20,120 --> 00:37:24,000 Surface, this is the LF. The LF has landed. 558 00:37:24,080 --> 00:37:28,000 That's great. 559 00:37:28,080 --> 00:37:32,680 He's not going to talk any more, he's going to navigate to CLOSP. 560 00:37:32,760 --> 00:37:36,080 'Victor is the first human being to reach the bottom, 561 00:37:36,160 --> 00:37:38,000 but the mission isn't over - 562 00:37:38,080 --> 00:37:41,840 he still needs to reach the deepest point of the Arctic Ocean. 563 00:37:41,920 --> 00:37:46,000 The lander probe named CLOSP has been dropped at this location. 564 00:37:46,080 --> 00:37:47,560 If Victor can find it, 565 00:37:47,640 --> 00:37:51,080 he'll complete his record-breaking Five Deeps mission. 566 00:37:51,160 --> 00:37:55,000 If he fails, his dream will remain beyond his reach.' 567 00:37:55,080 --> 00:37:58,840 Roger, LF. Searching for CLOSP. 568 00:37:58,920 --> 00:38:03,440 There's some little creatures on the bottom, quite a few. 569 00:38:03,520 --> 00:38:06,840 I'm getting a lot of violent variation in my heading, 570 00:38:06,920 --> 00:38:08,440 it's all over the place. 571 00:38:08,520 --> 00:38:12,080 I'm wondering if the magnetic field of the Earth this far north 572 00:38:12,160 --> 00:38:15,480 is playing havoc with my navigation system, 573 00:38:15,560 --> 00:38:17,840 giving a lot of erroneous readings. 574 00:38:17,920 --> 00:38:20,960 LF, surface. 575 00:38:21,040 --> 00:38:23,000 LF. Go ahead. 576 00:38:23,080 --> 00:38:29,040 The lander is approximately 200 metres. 577 00:38:29,120 --> 00:38:31,480 I've got a hard return dead ahead. 578 00:38:31,560 --> 00:38:34,960 I don't see his light, just too far out. 579 00:38:35,040 --> 00:38:37,920 Going due north. 580 00:38:38,000 --> 00:38:39,760 He must be getting close. 581 00:38:39,840 --> 00:38:43,640 Come on. OK, I'm getting slightly away. 582 00:38:43,720 --> 00:38:46,000 I'll try south again. 583 00:38:46,080 --> 00:38:49,160 Surely he's got it on sonar. 584 00:38:49,240 --> 00:38:51,840 , damn - 121 metres. 585 00:38:51,920 --> 00:38:54,560 All directions can't be farther away from you. 586 00:38:54,640 --> 00:38:56,640 Searching for CLOSP. 587 00:39:00,760 --> 00:39:03,040 Roger, LF - 588 00:39:03,120 --> 00:39:05,600 searching for CLOSP. 589 00:39:05,680 --> 00:39:08,560 'The clock is ticking. 590 00:39:08,640 --> 00:39:12,720 Victor must find the lander probe before the cold of the Arctic deep 591 00:39:12,800 --> 00:39:14,800 depletes his batteries.' 592 00:39:15,920 --> 00:39:19,600 OK, closing. It is north and east of me. 593 00:39:19,680 --> 00:39:21,800 No, a little more east. 594 00:39:21,880 --> 00:39:26,320 CLOSP. No matter what I do, I go farther away from it. 595 00:39:26,400 --> 00:39:30,000 It's now south of me. That's my skid marks there. 596 00:39:31,280 --> 00:39:34,600 'With his instruments malfunctioning, 597 00:39:34,680 --> 00:39:38,600 Victor is struggling to find his way in the abyss.' 598 00:39:38,680 --> 00:39:40,200 Very silty. 599 00:39:40,280 --> 00:39:44,720 If you blast the surface, you've really got to move to get out of it. 600 00:39:48,200 --> 00:39:52,080 I just cannot get a good - More north or more south? 601 00:39:54,200 --> 00:39:56,680 Oh, that's got to be him. 602 00:39:56,760 --> 00:39:59,120 I've got a really hard return. 603 00:40:00,120 --> 00:40:02,120 Come on. 604 00:40:02,200 --> 00:40:04,640 He's at the right depth. 605 00:40:04,720 --> 00:40:09,120 Present depth, 5-5-8-9. Life support, good. 606 00:40:09,200 --> 00:40:12,920 Roger, LF. We have you loud and clear. 607 00:40:14,400 --> 00:40:18,960 Surface, LF. Present depth, 5-5-8-9. 608 00:40:19,040 --> 00:40:22,680 He can't hear us. He can't hear us. 609 00:40:22,760 --> 00:40:27,080 'Victor's precious link to any help from above has cut out. 610 00:40:27,160 --> 00:40:28,760 He's now completely alone.' 611 00:40:28,840 --> 00:40:32,040 Did he get your message? Not sure. No, he didn't. 612 00:40:32,120 --> 00:40:33,960 . 613 00:40:37,720 --> 00:40:41,480 'With no link to the sub, mission control are powerless 614 00:40:41,560 --> 00:40:44,680 to help Victor with his time-critical search.' 615 00:40:44,760 --> 00:40:47,360 Can't hear them at all. 616 00:40:47,440 --> 00:40:51,720 Come on, I'm almost out of time. It's almost three hours down here. 617 00:40:58,240 --> 00:41:00,240 Come on! 618 00:41:00,320 --> 00:41:03,200 Ah - 23 metres. 619 00:41:03,280 --> 00:41:06,200 I have you now. 620 00:41:08,560 --> 00:41:10,720 I gotcha. 621 00:41:10,800 --> 00:41:13,200 There it is, the end of a dream. 622 00:41:18,040 --> 00:41:20,040 I have to touch down. 623 00:41:23,320 --> 00:41:26,640 I'm at the bottom of the Arctic Ocean. 624 00:41:26,720 --> 00:41:28,760 Surface, this is LF. 625 00:41:28,840 --> 00:41:32,840 Life support good. The LF has landed at CLOSP. 626 00:41:35,880 --> 00:41:39,560 Roger that. You are on the bottom. Congratulations. 627 00:41:39,640 --> 00:41:41,880 Thank you, sir, and thank you, all. 628 00:41:41,960 --> 00:41:45,440 All of you made this happen. Thank you so much. 629 00:41:45,520 --> 00:41:48,360 Woo-hoo! 630 00:41:48,440 --> 00:41:52,440 Hell of a thing. Patrick, we did it. 631 00:41:52,520 --> 00:41:56,520 Five Deeps, done. Let's go home. 632 00:42:01,120 --> 00:42:03,840 I've just completed the Five Deeps. 633 00:42:03,920 --> 00:42:08,400 This is the first submarine, and I guess I'm the first person 634 00:42:08,480 --> 00:42:11,160 down to all five of the world's oceans. 635 00:42:11,240 --> 00:42:15,720 It's incredibly exciting, I can't believe we were able to do it. 636 00:42:15,800 --> 00:42:17,840 What an amazing machine. 637 00:42:17,920 --> 00:42:21,200 'On its 46,000-mile, round-the-world odyssey, 638 00:42:21,280 --> 00:42:24,040 the sub has proven a triumph of engineering, 639 00:42:24,120 --> 00:42:27,760 conquering the most extreme underwater environments 640 00:42:27,840 --> 00:42:29,320 on the planet. 641 00:42:29,400 --> 00:42:34,200 Victor has overcome adversity in the depths of the Atlantic...' 642 00:42:34,280 --> 00:42:36,400 Oh! Oh, my God. 643 00:42:36,480 --> 00:42:39,360 We just lost the manipulator. 644 00:42:39,440 --> 00:42:42,400 '..conquered the extremes of the Southern Ocean, 645 00:42:42,480 --> 00:42:46,400 found new species in the Indian Ocean's tsunami hot spot...' 646 00:42:46,480 --> 00:42:49,120 I've never seen anything like that. 647 00:42:49,200 --> 00:42:51,440 '..and gone deeper than any human 648 00:42:51,520 --> 00:42:54,760 in the depths of the Pacific's Mariana Trench.' 649 00:42:54,840 --> 00:42:59,520 Victor Vescovo, world's deepest diver. Woo! You did it, buddy. 650 00:43:12,880 --> 00:43:15,800 Yeah, five! 651 00:43:18,600 --> 00:43:22,360 Well done. Lovely job, sir. 652 00:43:22,440 --> 00:43:25,800 Hey, buddy. Well done. Right on. 653 00:43:25,880 --> 00:43:30,240 'I'm so proud to have been part of this historic expedition. 654 00:43:30,320 --> 00:43:35,520 For me, it's been the privilege and honour of my professional life.' 655 00:43:35,600 --> 00:43:37,720 Well done. 656 00:43:37,800 --> 00:43:40,960 Congratulations, man. Congratulations to you. 657 00:43:41,040 --> 00:43:46,080 You built it. So proud of you. Thank you, Shane, well done. Awesome. 658 00:43:46,160 --> 00:43:49,320 Scientifically, it's been absolutely amazing. 659 00:43:49,400 --> 00:43:51,720 We discovered over 40 new species. 660 00:43:51,800 --> 00:43:53,560 What a thing. 661 00:43:53,640 --> 00:43:56,840 It's amazing. What is there to say? 662 00:43:56,920 --> 00:43:58,400 I dove to the bottom 663 00:43:58,480 --> 00:43:59,960 of all five oceans. 664 00:44:00,040 --> 00:44:03,400 It's a hell of a feeling, it feels fantastic. 665 00:44:06,400 --> 00:44:09,960 What kid doesn't want to grow up and be an explorer? 666 00:44:10,040 --> 00:44:11,520 If you put your mind to it 667 00:44:11,600 --> 00:44:13,560 and get the right people with you, 668 00:44:13,640 --> 00:44:16,360 almost anything is possible.