1 00:00:08,320 --> 00:00:11,780 Equipment -wise and weather -wise, you psychologically prepare yourself, 2 00:00:11,780 --> 00:00:15,160 with all best intentions, you can plan an expedition for two years, and you go 3 00:00:15,160 --> 00:00:16,500 there, and it just goes wrong. 4 00:00:17,380 --> 00:00:20,360 Sailors were actually terrified to come to this area because it was so 5 00:00:20,360 --> 00:00:21,820 dangerous, and ships did not return. 6 00:00:22,380 --> 00:00:23,380 Just watch that, Al. 7 00:00:24,600 --> 00:00:26,180 Up on the tow line a little bit. 8 00:00:27,340 --> 00:00:28,840 Al. Damn it! 9 00:00:33,100 --> 00:00:34,100 Al F. 10 00:00:35,080 --> 00:00:36,960 Al F, comms check. 11 00:00:37,390 --> 00:00:38,390 Tom, Jack. 12 00:00:39,010 --> 00:00:41,170 He didn't hear me. He didn't acknowledge. 13 00:00:46,150 --> 00:00:52,690 Humankind has explored every continent on Earth, climbed its tallest mountains, 14 00:00:52,910 --> 00:00:56,930 and even journeyed into space. 15 00:00:57,830 --> 00:00:59,090 Thank you, Mr. President. 16 00:00:59,350 --> 00:01:03,750 But there's a vast swath of our own planet that has remained a mystery. 17 00:01:08,940 --> 00:01:10,200 The deep ocean. 18 00:01:11,300 --> 00:01:15,140 Stretching down over 35 ,000 feet into crushing pressures. 19 00:01:15,540 --> 00:01:17,780 It's been near impossible to reach. 20 00:01:18,580 --> 00:01:19,680 Until now. 21 00:01:21,660 --> 00:01:27,180 New engineering breakthroughs are driving an audacious global mission to 22 00:01:27,180 --> 00:01:31,680 the deepest points of all the five oceans for the first time in history. 23 00:01:32,220 --> 00:01:35,820 These pioneers will push technology to the limit. 24 00:01:36,040 --> 00:01:37,040 What the hell was that? 25 00:01:37,080 --> 00:01:38,080 We have leaking hatch. 26 00:01:38,960 --> 00:01:42,360 To open up this final frontier as never before. 27 00:01:42,820 --> 00:01:46,880 Trying to, like, mentally put yourself at the bottom is just mind -blowing. 28 00:01:47,180 --> 00:01:48,740 Mapping hidden landscapes. 29 00:01:49,440 --> 00:01:51,340 Discovering unknown life forms. 30 00:01:51,600 --> 00:01:52,740 What the F is that? 31 00:01:53,760 --> 00:01:59,000 And unlocking the secrets of how life in the extreme deep ocean affects our 32 00:01:59,000 --> 00:02:00,000 entire planet. 33 00:02:13,840 --> 00:02:15,960 Okay, I'll get to go. Get to go. 34 00:02:17,500 --> 00:02:22,520 Extreme Explorer and ex -Naval Commander Victor Vescovo is putting his life on 35 00:02:22,520 --> 00:02:27,580 the line, as well as $50 million of his own money to pursue his dream. 36 00:02:27,900 --> 00:02:32,020 Good boy. What little boy or little girl doesn't grow up wanting to be an 37 00:02:32,020 --> 00:02:35,920 explorer? And here I am with a wonderful ship, a great crew, now the deepest 38 00:02:35,920 --> 00:02:37,340 diving submersible in the world. 39 00:02:37,910 --> 00:02:40,670 and I get to go play in the ocean with them and discover things that have never 40 00:02:40,670 --> 00:02:43,990 been seen before. How could you not be absolutely ecstatic? 41 00:02:45,070 --> 00:02:49,630 His mission is to travel to each of the five oceans, discover their deepest 42 00:02:49,630 --> 00:02:52,490 point, and unlock their unexplored secrets. 43 00:02:52,710 --> 00:02:57,050 He has already traveled over five miles down to the very bottom of the Atlantic 44 00:02:57,050 --> 00:02:58,990 Ocean. Oh my goodness, I can see the bottom. 45 00:03:02,390 --> 00:03:06,210 Now he and his team are heading for a far tougher challenge. 46 00:03:09,680 --> 00:03:11,100 The Southern Ocean. 47 00:03:11,860 --> 00:03:14,820 It surrounds the frozen continent of Antarctica. 48 00:03:16,400 --> 00:03:20,800 These are the coldest waters on the planet, and some of the roughest seas, 49 00:03:21,140 --> 00:03:25,000 making it perhaps the most dangerous of all the Earth's oceans. 50 00:03:25,860 --> 00:03:30,240 Some of the old -style maps had here be dragons, and sailors were actually 51 00:03:30,240 --> 00:03:33,560 terrified to come to this area because it was so dangerous, and ships did not 52 00:03:33,560 --> 00:03:35,380 return. They would be destroyed. 53 00:03:42,740 --> 00:03:46,020 Rising winds are already testing the crew and equipment. 54 00:03:47,880 --> 00:03:49,620 Getting a little brisk out here, all right. 55 00:03:50,200 --> 00:03:52,760 Lovely. Might have to take the shorts off. 56 00:03:54,100 --> 00:03:55,740 You have to go to long pants, too. 57 00:03:56,700 --> 00:03:57,700 Boy, you came up. 58 00:03:59,700 --> 00:04:00,960 Calvin, you need more than that? 59 00:04:06,980 --> 00:04:10,740 Soon, they're experiencing a full -scale snowstorm. 60 00:04:17,979 --> 00:04:18,979 Yeah, 61 00:04:22,040 --> 00:04:24,700 I got it. In this life, I'd rather be lucky than good. 62 00:04:25,120 --> 00:04:27,640 And when it comes to weather, you definitely want to be lucky. 63 00:04:29,120 --> 00:04:33,120 Victor is worried about the effects of the cold on the expedition's vital 64 00:04:33,120 --> 00:04:34,160 navigation equipment. 65 00:04:35,820 --> 00:04:36,880 Batteries look okay. 66 00:04:40,430 --> 00:04:41,810 Yeah, these guys did well. 67 00:04:42,710 --> 00:04:44,970 Very strange seeing snow on my landers. 68 00:04:46,810 --> 00:04:50,870 The snowstorm has been an early warning of the treacherous weather that could 69 00:04:50,870 --> 00:04:51,870 lie ahead. 70 00:04:55,490 --> 00:05:01,850 To search for the ocean's deepest point, Victor and his team are heading for a 71 00:05:01,850 --> 00:05:05,850 dramatic underwater chasm called the South Sandwich Trench. 72 00:05:08,460 --> 00:05:14,760 Over four and a half miles deep, its waters drop below freezing and are under 73 00:05:14,760 --> 00:05:20,840 huge pressure, five times the crushing power of a junkyard car compactor. 74 00:05:21,200 --> 00:05:26,140 It's very rarely visited, and certainly no one has ever mapped the South 75 00:05:26,140 --> 00:05:29,120 Sandwich Trench, certainly not with the kind of tools that we will have 76 00:05:29,120 --> 00:05:33,960 available. So in a way, this is very exciting for the whole crew because this 77 00:05:33,960 --> 00:05:34,960 true exploration. 78 00:05:36,190 --> 00:05:40,470 To protect Victor from the deadly pressures at the bottom of the trench, 79 00:05:40,470 --> 00:05:44,670 commissioned a remarkable prototype sub at a cost of $35 million. 80 00:05:46,670 --> 00:05:52,650 Surrounding the cockpit is a sphere of 3 .5 -inch thick titanium, punctured by 81 00:05:52,650 --> 00:05:54,910 wide -angle viewports made of acrylic. 82 00:05:55,770 --> 00:06:00,290 It's equipped with enough oxygen tanks to give him air for up to four days. 83 00:06:01,030 --> 00:06:05,870 But in the Southern Ocean, The sub will have to endure temperatures far colder 84 00:06:05,870 --> 00:06:07,870 than any it's experienced before. 85 00:06:08,210 --> 00:06:12,930 We'll have surface temperatures that are starting at zero or one degree rather 86 00:06:12,930 --> 00:06:17,050 than where we were before where the surface temperatures were 25 or 30 87 00:06:17,050 --> 00:06:22,930 Celsius. The depth, it'll be minus one. It's enough to affect our cabling, our 88 00:06:22,930 --> 00:06:24,070 connectors, our batteries. 89 00:06:24,880 --> 00:06:29,900 If the dive succeeds, the expedition scientists will be able to hunt for 90 00:06:29,900 --> 00:06:36,640 creatures of the deep and try to solve one of the Southern Ocean's greatest 91 00:06:36,640 --> 00:06:37,640 mysteries. 92 00:06:39,660 --> 00:06:46,240 These waters are in fact packed with oxygen and nutrients vital to life and 93 00:06:46,240 --> 00:06:49,640 the source of a global ocean current that feeds the world. 94 00:06:50,860 --> 00:06:55,660 Scientists are desperate to find where this lifeblood current exits the 95 00:06:55,660 --> 00:07:01,900 Ocean. The South Sandwich Trench is a prime suspect, but no one has been able 96 00:07:01,900 --> 00:07:07,620 dive deep enough to confirm it. The Southern Ocean, in my opinion, is one of 97 00:07:07,620 --> 00:07:09,500 most important locations of the planet. 98 00:07:09,960 --> 00:07:11,740 It's the lungs of Earth. 99 00:07:12,400 --> 00:07:17,420 It's vital to global ocean circulation, so we need to know more. We want to know 100 00:07:17,420 --> 00:07:18,420 more. 101 00:07:18,700 --> 00:07:23,460 To make their bold attempt, Victor and his team only have a short window of 102 00:07:23,460 --> 00:07:28,820 time, the brief Antarctic summer, when the pack ice that locks in over 7 103 00:07:28,820 --> 00:07:31,920 square miles of ocean melts and retreats. 104 00:07:35,740 --> 00:07:40,940 If you look at the Southern Ocean, every winter we grow almost the equivalent of 105 00:07:40,940 --> 00:07:45,300 the continental United States, and then summer melt that entire continent back. 106 00:07:49,840 --> 00:07:54,460 A hundred miles away from the deepest point, the team sees the chance of a 107 00:07:54,460 --> 00:07:57,380 in the weather to take the sub on an exploratory dive. 108 00:07:58,020 --> 00:08:02,780 It's an opportunity for chief scientist Alan Jameson to search for new creatures 109 00:08:02,780 --> 00:08:06,900 in the deep, and for Victor to put the sub through its paces in the southern 110 00:08:06,900 --> 00:08:08,260 ocean's freezing water. 111 00:08:11,020 --> 00:08:14,540 In the spotlight is the sub designer, John Ramsey. 112 00:08:15,080 --> 00:08:19,080 Mechanically, everything's great at cold temperatures. The electrical issues 113 00:08:19,080 --> 00:08:23,520 with cold circuit boards and things like that, just hoping everything's going to 114 00:08:23,520 --> 00:08:24,520 be fine for the guys. 115 00:08:24,560 --> 00:08:29,820 First, the team needs to launch their $35 million sub off the back of a ship 116 00:08:29,820 --> 00:08:32,640 being buffeted by the volatile Southern Ocean. 117 00:08:32,880 --> 00:08:37,260 The most dangerous part of any of our operations will always be launch and 118 00:08:37,260 --> 00:08:38,260 recovery. 119 00:08:38,480 --> 00:08:43,440 That's when you're dealing with forces that are unpredictable, and managing 120 00:08:43,440 --> 00:08:44,460 is a difficult thing. 121 00:08:44,900 --> 00:08:48,300 Bridge, Bridge, that's all. We're ready to launch here. A little roly -poly, but 122 00:08:48,300 --> 00:08:49,300 we'll give her a shot. 123 00:08:51,460 --> 00:08:55,260 Yeah, let's do this. Out on the A -frame, following the tagline slowly. 124 00:08:58,580 --> 00:09:00,400 The waves are coming in behind us. 125 00:09:01,540 --> 00:09:04,060 LF, be advised, it's going to get a little sloppy here for a minute. 126 00:09:04,640 --> 00:09:07,880 This is where we start to rock and roll. Okay. Here we go, boys. You're going to 127 00:09:07,880 --> 00:09:08,739 have to do it quick. 128 00:09:08,740 --> 00:09:09,740 Seriously, we're apart. 129 00:09:11,040 --> 00:09:12,940 Okay, fast on the main. Fast on the main. 130 00:09:13,260 --> 00:09:15,640 We're out of time. Up on the tow line a little bit. 131 00:09:19,140 --> 00:09:20,140 Up. 132 00:09:25,620 --> 00:09:27,200 Just hang on. Just hang on, buddy. 133 00:09:30,860 --> 00:09:32,380 Get that out on the tow line. 134 00:09:32,700 --> 00:09:33,700 Whoa, whoa, whoa. 135 00:09:35,140 --> 00:09:36,300 Why are we doing it? 136 00:09:38,100 --> 00:09:39,100 I don't know. 137 00:09:41,420 --> 00:09:42,520 I don't know why. 138 00:09:43,160 --> 00:09:46,140 And have that happen right at the moment you're releasing it. 139 00:09:46,720 --> 00:09:49,100 You know, that's just a sickening feeling. 140 00:09:55,140 --> 00:09:59,360 I'd just be advised, looks like you may have lost your starboard camera. 141 00:10:00,280 --> 00:10:01,800 Roger that. Permission to dive. 142 00:10:02,800 --> 00:10:05,280 Negative, negative. We've got a key release in the tow line, Joe. 143 00:10:05,700 --> 00:10:07,400 Okay, let's pick up the... Yep. 144 00:10:14,420 --> 00:10:15,420 Damn it! 145 00:10:16,700 --> 00:10:17,740 What happened to the tow line? 146 00:10:18,100 --> 00:10:19,360 Yeah, we broke the tow line. 147 00:10:20,080 --> 00:10:21,080 We'll get her, McGee. 148 00:10:21,660 --> 00:10:24,400 Without its tow line, the sub is now adrift. 149 00:10:24,860 --> 00:10:29,500 The team must clear the remaining lines and avoid getting freezing water inside 150 00:10:29,500 --> 00:10:30,820 their protective clothing. 151 00:10:32,230 --> 00:10:36,030 In the cold water of the Southern Ocean, if you go into the water, you've only 152 00:10:36,030 --> 00:10:39,170 got about a minute before you're in serious trouble. 153 00:10:42,950 --> 00:10:44,790 Just get ready. Get people in the water. 154 00:10:46,750 --> 00:10:47,890 What am I supposed to do? 155 00:10:58,960 --> 00:11:03,000 After rough seas caused the sub to collide with the back of the ship on 156 00:11:03,180 --> 00:11:05,760 the sub has lost one of its external cameras. 157 00:11:06,680 --> 00:11:11,380 The team can't see any other damage and decide to press ahead with the dive. 158 00:11:11,740 --> 00:11:16,220 Yeah, you're clear to dive. 159 00:11:16,760 --> 00:11:17,760 Clear to dive. 160 00:11:17,880 --> 00:11:18,759 Pumping in. 161 00:11:18,760 --> 00:11:19,760 Okay, here we go. 162 00:11:31,240 --> 00:11:32,520 We're descending and we're underwater. 163 00:11:33,120 --> 00:11:34,580 It's eerily quiet. 164 00:11:34,900 --> 00:11:35,900 Yeah. 165 00:11:39,160 --> 00:11:43,800 The green color of the water here is evidence of what makes the Southern 166 00:11:43,800 --> 00:11:45,960 so vital to life around the world. 167 00:11:46,360 --> 00:11:50,900 Plentiful nutrients build up here during the long, dark winters, and in the 168 00:11:50,900 --> 00:11:54,860 summer feed explosions of microscopic plants called phytoplankton. 169 00:11:55,780 --> 00:11:57,880 They bloom in such quantities... 170 00:11:58,240 --> 00:12:01,160 that NASA has even been able to track them from space. 171 00:12:02,020 --> 00:12:06,240 It was mind -blowing that on that type of scale in the Southern Ocean, the 172 00:12:06,240 --> 00:12:09,640 phytoplankton were responding to the surface currents and the winds and their 173 00:12:09,640 --> 00:12:11,820 distribution, and you could see that from space. 174 00:12:13,500 --> 00:12:19,080 Plants depend on light, and so they live in a narrow band near the surface, the 175 00:12:19,080 --> 00:12:20,080 sunlight zone. 176 00:12:21,260 --> 00:12:26,220 And here they in turn support an abundance of microorganisms called 177 00:12:26,750 --> 00:12:32,610 which feed a rich food chain, from penguins to killer whales. 178 00:12:37,010 --> 00:12:42,430 Passing below 650 feet, the sub enters the twilight zone. 179 00:12:43,130 --> 00:12:47,610 Here the light dwindles, and the ocean's microscopic plants can no longer 180 00:12:47,610 --> 00:12:48,610 survive. 181 00:12:49,250 --> 00:12:53,690 Yet life does thrive here, like this ice fish. 182 00:12:54,240 --> 00:12:58,800 Its blood still runs because it has a natural antifreeze in its veins. 183 00:13:02,060 --> 00:13:07,760 And transparent jelly -like organisms called salps that string together in 184 00:13:07,760 --> 00:13:08,760 chains. 185 00:13:11,240 --> 00:13:12,540 See, look how dark it is. 186 00:13:13,020 --> 00:13:14,480 That's incredible, isn't it? 187 00:13:14,740 --> 00:13:19,000 Surface, this is LF. Present depth, 348 meters. 188 00:13:20,840 --> 00:13:25,540 Victor and Alan have been underwater for just 10 minutes, but the surface crew 189 00:13:25,540 --> 00:13:28,400 have spotted evidence of a worrying fault with the sub. 190 00:13:30,940 --> 00:13:35,660 It seems 191 00:13:35,660 --> 00:13:42,320 that when one of the 192 00:13:42,320 --> 00:13:46,840 sub's cameras was damaged on launch, it breached the oil -filled pipes that 193 00:13:46,840 --> 00:13:49,120 carry electrical wires around the sub. 194 00:13:49,600 --> 00:13:54,600 It's now only a matter of time before seawater gets in and shorts out a vital 195 00:13:54,600 --> 00:13:56,060 part of the electrical system. 196 00:13:56,720 --> 00:14:01,900 The sub's power comes from six batteries packed into detachable pods on either 197 00:14:01,900 --> 00:14:02,900 side of the sphere. 198 00:14:03,340 --> 00:14:07,580 They, in turn, link to junction boxes that supply the sub's components. 199 00:14:08,260 --> 00:14:12,500 To protect the wires and electronics from the pressures of the deep, the 200 00:14:12,500 --> 00:14:14,320 and pipes are all filled with oil. 201 00:14:14,700 --> 00:14:19,320 Because oil is lighter than water, It's now escaping from the breach at the top 202 00:14:19,320 --> 00:14:21,540 of the sub, letting water seep in. 203 00:14:22,020 --> 00:14:27,220 If it reaches the junction box, it will knock out multiple components, leaving 204 00:14:27,220 --> 00:14:31,860 Victor without full control of the sub, 2 ,000 feet below the surface. 205 00:14:33,260 --> 00:14:34,260 Okay, response. 206 00:14:34,500 --> 00:14:38,960 Need you to instruct the LF to abort the dive. They're going to have to abort 207 00:14:38,960 --> 00:14:39,960 the dive. 208 00:14:40,240 --> 00:14:45,020 There are times when you have to call it, and even if it's unpopular, you do 209 00:14:45,020 --> 00:14:46,560 because you have to do it safe. 210 00:14:51,380 --> 00:14:55,420 Roger that. 211 00:14:55,740 --> 00:14:56,559 Aborting dive. 212 00:14:56,560 --> 00:14:57,940 Repeat, aborting dive. 213 00:14:58,300 --> 00:15:02,340 Why? When we lost the camera, it sheared the cable, so the oil started leaking. 214 00:15:02,660 --> 00:15:03,660 Oh. 215 00:15:03,890 --> 00:15:08,130 Victor must now make a controlled release of enough of the diving weight 216 00:15:08,130 --> 00:15:10,330 bring the sub safely back to the surface. 217 00:15:11,110 --> 00:15:12,110 Ejecting weight. 218 00:15:13,230 --> 00:15:15,050 All weights jettisoned. 219 00:15:15,290 --> 00:15:16,450 Ascending to surface. 220 00:15:17,270 --> 00:15:18,570 Get ready to brace. 221 00:15:33,930 --> 00:15:39,470 We had to abort you, man, because you would have lost your modem anyway. So at 222 00:15:39,470 --> 00:15:41,590 some point, you'd have been coming up even if you didn't want to. 223 00:15:46,330 --> 00:15:48,270 Repairs to the damaged sub begin. 224 00:15:48,590 --> 00:15:54,210 And the team encounter another deadly hazard of the Southern Ocean. 225 00:15:56,630 --> 00:15:57,630 Iceberg. 226 00:15:58,510 --> 00:16:03,110 A specialist ice pilot has joined forces with the captain to navigate through 227 00:16:03,110 --> 00:16:05,290 these unpredictable ship sinkers. 228 00:16:06,090 --> 00:16:09,930 Nine -tenths of an iceberg is underneath the ice. 229 00:16:11,510 --> 00:16:16,830 And I've seen icebergs going against the wind, which is completely not 230 00:16:16,830 --> 00:16:17,830 intuitive. 231 00:16:18,930 --> 00:16:25,170 To begin with, the icebergs are relatively small. But then comes a 232 00:16:28,000 --> 00:16:30,100 That's the target. We're dead ahead of its time. 233 00:16:31,440 --> 00:16:34,780 Is this the biggest you've ever seen? I've never seen one this big. It's 234 00:16:34,780 --> 00:16:35,780 extraordinary. 235 00:16:35,980 --> 00:16:37,640 It goes off into the horizon. 236 00:16:38,220 --> 00:16:43,400 It disappears off into the fog, and then disappears off into the fog on the 237 00:16:43,400 --> 00:16:43,959 other side. 238 00:16:43,960 --> 00:16:44,960 This is massive. 239 00:16:45,280 --> 00:16:46,480 How long is it, Stu? 240 00:16:46,780 --> 00:16:48,480 Eight feet miles, that's what I think. 241 00:16:48,780 --> 00:16:50,580 It's more than a half marathon long. 242 00:16:51,740 --> 00:16:55,200 The icebergs actually pose a true danger. So when I'm coming up from the 243 00:16:55,200 --> 00:16:58,600 bottom... I don't want to be going up too fast because I don't know what's 244 00:16:58,600 --> 00:16:59,860 directly on top of me. 245 00:17:02,900 --> 00:17:07,940 Finally, the team arrive above the South Sandwich Trench, a vast underwater 246 00:17:07,940 --> 00:17:11,099 canyon that's a staggering four and a half miles deep. 247 00:17:11,500 --> 00:17:16,480 Their first task is to identify on the floor of the trench the precise location 248 00:17:16,480 --> 00:17:18,819 of the deepest point in the Southern Ocean. 249 00:17:19,740 --> 00:17:24,079 Using one of the most powerful sonar scanning systems in the world, they 250 00:17:24,079 --> 00:17:24,939 to map. 251 00:17:24,940 --> 00:17:29,280 for the very first time in history, an extraordinary hidden landscape. 252 00:17:29,820 --> 00:17:34,900 If this were inverted and was a mountain range, it would actually be higher than 253 00:17:34,900 --> 00:17:36,420 the entire Andes mountain chain. 254 00:17:36,660 --> 00:17:37,720 It's massive. 255 00:17:39,140 --> 00:17:45,180 The South Sandwich Trench is a staggering 600 miles long, stretching 256 00:17:45,180 --> 00:17:48,620 lower reaches of the Atlantic down into the Southern Ocean itself. 257 00:17:51,110 --> 00:17:55,810 But up on the bridge, the team spot a growing threat to the deep dive. 258 00:17:56,330 --> 00:17:58,490 These storms are moving a little faster than expected. 259 00:17:58,730 --> 00:18:01,650 The two low -pressure systems are causing all this weather to go in like a 260 00:18:01,650 --> 00:18:05,630 funnel. We can't outrun it. We point the ship into the storm, and we ride it 261 00:18:05,630 --> 00:18:06,630 out. 262 00:18:13,960 --> 00:18:17,920 In the freezing waters of the Southern Ocean, an approaching storm is 263 00:18:17,920 --> 00:18:22,480 threatening to derail Victor's attempt to discover and dive its deepest point. 264 00:18:22,780 --> 00:18:27,540 We are in the screaming 60s. You do not hang out at this latitude and not have 265 00:18:27,540 --> 00:18:28,540 storms come at you. 266 00:18:28,820 --> 00:18:32,600 Even if it's pretty rough weather, we're just going to tough it out so we can 267 00:18:32,600 --> 00:18:35,880 get the bio samples, etc. Even if we don't dive it, it's a light to deploy 268 00:18:35,880 --> 00:18:40,640 landers. The landers are underwater scientific probes packed with sensors, 269 00:18:40,940 --> 00:18:42,460 cameras, and traps. 270 00:18:43,400 --> 00:18:47,920 They are vital for the team's mission to explore what life could possibly exist 271 00:18:47,920 --> 00:18:51,600 in the icy waters 24 ,000 feet below. 272 00:18:51,920 --> 00:18:56,120 Pretty exciting. We're at the limits of this planet, basically. Ultra -cold and 273 00:18:56,120 --> 00:18:58,840 high pressure is very hard to adapt to. 274 00:18:59,340 --> 00:19:03,780 There are five landers on board, costing up to $200 ,000 each. 275 00:19:03,980 --> 00:19:08,480 But with a storm on its way, to launch and retrieve these near one -ton 276 00:19:08,480 --> 00:19:10,220 could put lives on the line. 277 00:19:10,880 --> 00:19:12,740 Hope it doesn't snow more. We don't want... 278 00:19:31,770 --> 00:19:36,970 Despite the conditions, two science probes are heading for the seabed. 279 00:19:39,130 --> 00:19:40,570 Eight hours later. 280 00:19:40,960 --> 00:19:44,120 And after a remote release, they are due back on the surface. 281 00:19:44,560 --> 00:19:48,240 But now the weather is taking a dramatic turn for the worse. 282 00:19:49,100 --> 00:19:54,020 The nature of what we do is notoriously dangerous in terms of equipment -wise 283 00:19:54,020 --> 00:19:57,780 and weather -wise. You psychologically prepare yourself because with all best 284 00:19:57,780 --> 00:20:00,980 intentions, you can plan an expedition for two years and you go there and it 285 00:20:00,980 --> 00:20:01,980 just goes wrong. 286 00:20:03,100 --> 00:20:04,100 Where are they? 287 00:20:05,800 --> 00:20:06,800 Yeah, I got them. 288 00:20:07,130 --> 00:20:10,290 Hey, do you know we have a vehicle about 800 metres away? 289 00:20:10,490 --> 00:20:14,950 Oh, man. 290 00:20:22,690 --> 00:20:23,830 Just watch that arm. 291 00:20:24,090 --> 00:20:25,930 It just ever did one little roll. 292 00:20:30,650 --> 00:20:31,650 It's scary. 293 00:20:52,330 --> 00:20:58,770 You see what happened to the rope? 294 00:21:00,170 --> 00:21:01,610 Looks like something chewed it. 295 00:21:05,420 --> 00:21:10,060 A crucial piece of scientific equipment and any extreme life forms it may have 296 00:21:10,060 --> 00:21:14,060 captured are now plummeting back to the seabed, never to be seen again. 297 00:21:16,460 --> 00:21:22,300 And now comes more bad news. The crew have failed to locate the second probe. 298 00:21:23,500 --> 00:21:29,760 And because the Antarctic winter is now fast approaching, 299 00:21:30,100 --> 00:21:33,300 they must abandon the search and move on. 300 00:21:34,800 --> 00:21:35,900 Very distressing. 301 00:21:36,360 --> 00:21:40,200 If we have limited time and we've got bad weather coming, we might not get 302 00:21:40,200 --> 00:21:41,200 another chance. 303 00:21:45,960 --> 00:21:49,520 There is better news for the sonar team mapping the trench. 304 00:21:49,920 --> 00:21:50,960 Wow, who's that? 305 00:21:51,360 --> 00:21:55,400 This is a seamount that's 1 ,100 meters off the seafloor. 306 00:21:57,320 --> 00:22:00,480 The seamount is an extinct underwater volcano. 307 00:22:01,180 --> 00:22:04,220 Previously unknown, the team get to name it. 308 00:22:04,720 --> 00:22:08,920 It's a stark reminder that we know more about the surface of the moon than the 309 00:22:08,920 --> 00:22:10,340 seabed of our own planet. 310 00:22:10,600 --> 00:22:11,600 It's just fantastic. 311 00:22:11,720 --> 00:22:13,860 I mean, nobody knew anything about this area. 312 00:22:14,240 --> 00:22:18,140 And look at all the amazing features that have been imaged by the sonar. 313 00:22:19,360 --> 00:22:24,840 The new data also bolsters the theory that the South Sandwich Trench is the 314 00:22:24,840 --> 00:22:27,880 of the mysterious lifeblood current which feeds the world. 315 00:22:28,860 --> 00:22:33,700 When you carve trenches in the ocean, you create a funnel where water flows. 316 00:22:34,460 --> 00:22:39,340 Are these trenches reservoirs relatively undisturbed, or are they dynamic 317 00:22:39,340 --> 00:22:40,800 throughflows of water? 318 00:22:41,800 --> 00:22:46,420 To confirm the theory, the team need to sample the deep trench itself. 319 00:22:47,160 --> 00:22:51,640 And now, for the first time in history, they've accurately pinpointed the very 320 00:22:51,640 --> 00:22:53,540 deepest site in the Southern Ocean. 321 00:22:53,940 --> 00:22:57,840 Based on the satellite data, this one right here has always been the one that 322 00:22:57,840 --> 00:23:01,380 thought was going to be the deepest, or this last one. 323 00:23:01,850 --> 00:23:07,010 No one considered the third one. Now we know the deepest point in the Southern 324 00:23:07,010 --> 00:23:10,430 Ocean is this yellow dot right here. Wow. 325 00:23:12,550 --> 00:23:19,510 A staggering 24 ,388 feet below the surface, this is Victor's target 326 00:23:19,510 --> 00:23:22,650 for a dive he's determined to take on alone. 327 00:23:23,190 --> 00:23:27,290 Doing things solo, you're completely responsible for everything that happens, 328 00:23:27,410 --> 00:23:29,970 and you're doing it by yourself with such intense focus. 329 00:23:30,780 --> 00:23:33,080 Makes it more interesting, I guess, for me. It's more exciting. 330 00:23:33,280 --> 00:23:34,620 You're completely on your own. 331 00:23:36,500 --> 00:23:41,240 There are now just days left before the Antarctic summer ends and the Southern 332 00:23:41,240 --> 00:23:43,420 Ocean becomes too dangerous to dive. 333 00:23:43,940 --> 00:23:48,080 With rough seas forecast for tomorrow, it's now or never. 334 00:23:48,720 --> 00:23:52,080 But there are major concerns for Victor's safety. 335 00:23:56,080 --> 00:23:57,860 I don't want to slam into the bottom of the iceberg. 336 00:23:58,220 --> 00:24:02,640 There are huge bricks of ice out there. I mean, apartment -sized blocks of ice. 337 00:24:14,680 --> 00:24:19,600 The expedition team are facing a major setback in their plans to send Victor 338 00:24:19,600 --> 00:24:21,980 down to the deepest point of the Southern Ocean. 339 00:24:22,850 --> 00:24:25,830 iceberg that could threaten his return to the surface. 340 00:24:27,270 --> 00:24:30,350 Despite the risk, they decide to press ahead. 341 00:24:30,690 --> 00:24:33,910 He's going to make a very careful and deliberate return to the surface. We 342 00:24:33,910 --> 00:24:38,930 to make sure that he verifies himself with cameras that the surface is clear, 343 00:24:39,030 --> 00:24:43,630 just in case we have him misplaced on our chart. Frankly, I'm going to use 344 00:24:43,630 --> 00:24:47,190 power to slowly go up. I'm not going to drop the freeboard to rock it up. 345 00:24:48,330 --> 00:24:52,550 The team prepare to launch Victor on his historic attempt into the freezing 346 00:24:52,550 --> 00:24:56,170 temperatures of the deep trench beyond any hope of rescue. 347 00:24:56,410 --> 00:24:59,330 Okay, you're going to have a great dive. I know, it'll be awesome. Going to the 348 00:24:59,330 --> 00:25:03,390 bottom of the ocean in a submersible is like going on a space mission in terms 349 00:25:03,390 --> 00:25:04,710 of the isolation. 350 00:25:05,490 --> 00:25:06,409 Coming down. 351 00:25:06,410 --> 00:25:07,910 That's coming down. Thank you. 352 00:25:08,230 --> 00:25:09,930 Okay, let's do this. Get them in, boys. 353 00:25:10,330 --> 00:25:15,350 The cold, extreme remoteness that would play on Victor's mind because if 354 00:25:15,350 --> 00:25:16,550 anything goes wrong... 355 00:25:16,760 --> 00:25:22,060 You're right at the end of the most stretched rubber band in history, and 356 00:25:22,060 --> 00:25:23,980 really hoping that we'll clue you back. 357 00:25:26,900 --> 00:25:27,960 LF, it's pumping in. 358 00:25:29,220 --> 00:25:30,220 Receiving the dive. 359 00:25:30,740 --> 00:25:31,740 LF, 360 00:25:32,640 --> 00:25:34,440 you are a watch. You are a watch. 361 00:25:35,000 --> 00:25:36,740 Roger that. I'll try to bluster it down. 362 00:25:37,060 --> 00:25:38,060 Thanks. 363 00:25:41,280 --> 00:25:42,760 And down we go. 364 00:25:53,320 --> 00:25:56,240 Looking outside the portal, looks like a lot of food down here. 365 00:25:57,100 --> 00:25:58,980 Oh, I just saw a jellyfish. 366 00:26:00,400 --> 00:26:02,920 Surface, LF, present depth. 367 00:26:03,240 --> 00:26:07,020 Present depth, 4, 8, 7, life support good. 368 00:26:07,400 --> 00:26:10,560 Roger that, LF. We have you loud and clear. 369 00:26:11,060 --> 00:26:12,080 Wow, that was quick. 370 00:26:12,280 --> 00:26:15,600 I mean, he is whistling down. 371 00:26:16,600 --> 00:26:21,080 Within just minutes, Victor reaches the very deepest zones of the Southern 372 00:26:21,080 --> 00:26:26,200 Ocean. The midnight zone, where no light at all can penetrate, and where 373 00:26:26,200 --> 00:26:29,040 extraordinary creatures are still being discovered. 374 00:26:30,000 --> 00:26:34,740 The giant sea spider, whose internal organs are carried inside its legs. 375 00:26:37,160 --> 00:26:42,500 The feather star, which uses the long spines along its arms to filter out 376 00:26:42,500 --> 00:26:44,440 microscopic food from the water. 377 00:26:45,580 --> 00:26:47,260 And visitors from above. 378 00:26:47,760 --> 00:26:51,980 deep -diving sperm whales which have the largest brains of any creature that's 379 00:26:51,980 --> 00:26:53,080 ever lived on Earth. 380 00:26:56,580 --> 00:27:03,360 At 13 ,000 feet, Victor enters the Abyssal Zone, home to sea pigs that 381 00:27:03,360 --> 00:27:08,920 inflate up to seven pairs of legs to walk around the sea floor and 382 00:27:08,920 --> 00:27:15,280 alarm jellyfish that, if attacked, emit bioluminescent flashes thought to act 383 00:27:15,280 --> 00:27:16,340 like a burglar alarm. 384 00:27:16,720 --> 00:27:18,780 to attract bigger predators to the scene. 385 00:27:19,640 --> 00:27:23,320 You can already feel the cold coming through the bottom of the submersible. 386 00:27:23,840 --> 00:27:28,200 The temperature of the salt water outside has now dipped below freezing. 387 00:27:39,560 --> 00:27:41,360 Let's see if I hear something unusual. 388 00:27:42,040 --> 00:27:44,740 I don't have any systems on. I'm certainly not using thrusters. 389 00:27:45,480 --> 00:27:46,500 It's almost like a hum. 390 00:27:48,320 --> 00:27:50,160 Does it sound like a low hum? 391 00:27:51,140 --> 00:27:53,360 Coming from outside the sub. I don't think I've heard that before. 392 00:27:56,040 --> 00:27:57,980 Shoot, so much background noise right now. 393 00:27:58,480 --> 00:28:00,900 Seems to be coming from the submarine. I can't hear the surface. 394 00:28:02,180 --> 00:28:05,880 Surface, LF, present depth 5031. 395 00:28:06,420 --> 00:28:08,060 I cannot read you. 396 00:28:11,140 --> 00:28:14,720 LF, comms check, comms check. 397 00:28:18,030 --> 00:28:19,990 He didn't hear me. He didn't acknowledge. 398 00:28:24,150 --> 00:28:25,730 What's going on with that thing? 399 00:28:25,970 --> 00:28:28,810 Do you read me? Do you read me at all? 400 00:28:30,730 --> 00:28:35,010 As a submarine pilot, you don't want to lose communication with the surface. 401 00:28:35,230 --> 00:28:36,710 That's extremely dangerous. 402 00:28:37,050 --> 00:28:38,050 Extremely dangerous. 403 00:28:41,930 --> 00:28:43,390 Dada! Dada! 404 00:28:45,790 --> 00:28:48,200 What the... What's going on where he can't hear us? 405 00:29:01,560 --> 00:29:03,960 Loud and clear! 406 00:29:04,300 --> 00:29:05,300 Loud and clear! 407 00:29:07,860 --> 00:29:09,300 Crystal clear audio. 408 00:29:11,240 --> 00:29:12,380 I can hear him. 409 00:29:13,660 --> 00:29:15,760 It's a critical moment in the dive. 410 00:29:16,200 --> 00:29:19,320 Should Victor abandon or continue into the deep? 411 00:29:20,880 --> 00:29:22,380 Maybe it's the cold water or something. 412 00:29:23,460 --> 00:29:26,540 3 ,000 meters from the bottom. We may just keep going. 413 00:29:28,100 --> 00:29:29,240 I've come all this way. 414 00:29:30,420 --> 00:29:31,940 We're going to achieve the mission here. 415 00:29:32,960 --> 00:29:34,520 I'm not going to work for comms out. 416 00:29:37,300 --> 00:29:42,300 As he descends further into the trench, it's not just the communication system 417 00:29:42,300 --> 00:29:44,780 under attack from the freezing Antarctic waters. 418 00:29:50,920 --> 00:29:55,280 The electrical supply to the external cameras has also cut out. 419 00:29:56,700 --> 00:30:01,020 Well, now I'm really alone. I don't have comms with the surface. I'm in a 420 00:30:01,020 --> 00:30:03,600 submersible by myself going down to the bottom of the Fibonacci. 421 00:30:18,350 --> 00:30:23,310 In mission control, it's been two hours since they last made contact with the 422 00:30:23,310 --> 00:30:24,310 sub. 423 00:30:27,070 --> 00:30:33,150 Yeah, attention all stations. Be advised, we can hear Victor, but we 424 00:30:33,150 --> 00:30:37,050 communicate with him. He cannot hear us. He's very close to the lander. Yeah, 425 00:30:37,050 --> 00:30:39,510 it's over a couple of hundred meters, so he must be near the bottom. 426 00:30:42,630 --> 00:30:46,690 Insulation fault. That's probably just some water residue in there. 427 00:30:46,690 --> 00:30:47,690 looking good. 428 00:30:48,240 --> 00:30:49,840 I should be getting there really close now. 429 00:30:50,540 --> 00:30:51,540 Oh, my. 430 00:30:52,640 --> 00:30:54,160 And I can see something on the bottom. 431 00:30:55,340 --> 00:30:57,000 Now I'm seeing the bottom much more clearly. 432 00:31:06,940 --> 00:31:08,820 I've just reached the bottom of the Southern Ocean. 433 00:31:09,580 --> 00:31:11,740 Looks like a moonscape out of one of my portals. 434 00:31:12,920 --> 00:31:15,660 Surface, LF, at bottom, repeat. 435 00:31:16,680 --> 00:31:17,680 On the bottom. 436 00:31:20,100 --> 00:31:24,720 I am at bottom. 437 00:31:26,180 --> 00:31:27,860 I'm at the bottom of the Southern Ocean. 438 00:31:29,540 --> 00:31:36,500 Victor is an amazing 24 ,388 feet below the surface, where no human 439 00:31:36,500 --> 00:31:37,660 has ever been before. 440 00:31:42,730 --> 00:31:47,110 The team have also deployed here their three remaining science probes, or 441 00:31:47,110 --> 00:31:50,170 landers, baited with tempting fish carcasses. 442 00:31:50,970 --> 00:31:55,970 And although Victor's external sub -cameras may have cut out, amazingly, 443 00:31:55,970 --> 00:31:58,270 cameras on the landers are still working. 444 00:31:58,850 --> 00:32:04,930 They now capture Victor's arrival at the bottom, his life just visible across 445 00:32:04,930 --> 00:32:05,930 the sea floor. 446 00:32:08,240 --> 00:32:12,780 These are the first ever images captured at the bottom of the South Sandwich 447 00:32:12,780 --> 00:32:18,040 Trench. And attracted by the lander's bait, there's already a crowd of super 448 00:32:18,040 --> 00:32:23,040 -strained specialists, able to endure intense cold and enormous pressure. 449 00:32:23,540 --> 00:32:27,820 See, tiny, white, they're like perfectly white. They look like tadpoles. 450 00:32:29,060 --> 00:32:30,440 Look at that over there. 451 00:32:31,080 --> 00:32:34,860 A larger creature, a little pink on the top. 452 00:32:35,300 --> 00:32:36,840 He has a little pink head. 453 00:32:37,230 --> 00:32:38,230 Two big eyes. 454 00:32:39,330 --> 00:32:40,870 Oh, he's definitely swimming. 455 00:32:41,070 --> 00:32:42,750 He's swimming away from my blast. 456 00:32:43,670 --> 00:32:49,050 It seems that Victor has identified a mycid, a type of crustacean whose bright 457 00:32:49,050 --> 00:32:53,470 red color, in fact, makes it even more invisible in the pitch dark of the deep 458 00:32:53,470 --> 00:32:54,470 ocean. 459 00:32:55,090 --> 00:33:00,270 1 ,500 feet further up the trench slope, a second lander is capturing remarkable 460 00:33:00,270 --> 00:33:03,230 images of the range of life that thrives here. 461 00:33:04,170 --> 00:33:05,290 Sea lilies. 462 00:33:05,760 --> 00:33:08,220 and tall tubular glass sponges. 463 00:33:08,700 --> 00:33:13,000 Both snag passing microorganisms drifting past in the current. 464 00:33:13,700 --> 00:33:18,580 And higher up the slope still, a third lander is capturing the first ever 465 00:33:18,580 --> 00:33:21,680 footage in this trench of a truly remarkable creature. 466 00:33:23,200 --> 00:33:28,360 Known as a snailfish, this is the deepest living kind of fish yet 467 00:33:32,840 --> 00:33:37,240 And here are two new species filmed for the very first time. 468 00:33:38,620 --> 00:33:43,560 The snailfish are not here for the bait itself, but to pick off any scavengers 469 00:33:43,560 --> 00:33:44,560 the bait attracts. 470 00:33:45,420 --> 00:33:50,200 Finally, the lander's auto -release mechanisms activate, and they head back 471 00:33:50,200 --> 00:33:51,200 the surface. 472 00:33:55,340 --> 00:34:00,860 But now comes the massive challenge of safely retrieving these $200 ,000 pieces 473 00:34:00,860 --> 00:34:02,900 of equipment in heavy fees. 474 00:34:03,440 --> 00:34:06,040 What have we got? I think I'll just be happy if it lands on deck. 475 00:34:06,440 --> 00:34:09,679 Oh! It's the most difficult sight to catch on because of the palm. 476 00:34:10,179 --> 00:34:13,600 Having lost two landers already, the pressure is on. 477 00:34:14,340 --> 00:34:16,219 Charlie, we're going to have to cross the tagline. 478 00:34:16,500 --> 00:34:17,500 Yeah? Oh! 479 00:34:18,920 --> 00:34:21,040 Don't lose your balance. No, it's the same as the thing. 480 00:34:21,420 --> 00:34:24,420 Whoa. Wait, wait, wait, wait, wait. 481 00:34:27,170 --> 00:34:28,429 All right, got it. 482 00:34:30,030 --> 00:34:33,010 All right, what does the bait look like? 483 00:34:37,770 --> 00:34:41,630 Oh, there we go. There are absolutely thousands of them. 484 00:34:43,050 --> 00:34:49,090 The team have a vital horde of specimens from 24 ,000 feet down whose chemical 485 00:34:49,090 --> 00:34:52,870 secrets could set the stage for scientific breakthroughs in the future. 486 00:34:53,389 --> 00:34:57,490 Hopefully, we'll discover new molecules that have to do with combination of 487 00:34:57,490 --> 00:35:00,350 pressure and ultra -cold temperatures. 488 00:35:00,830 --> 00:35:02,990 Those may have all kinds of applications. 489 00:35:03,350 --> 00:35:07,250 In China, they've been able to use the osmolite that we discovered in deep -sea 490 00:35:07,250 --> 00:35:12,370 animals to actually cure glaucoma, which is a high -pressure disease of the 491 00:35:12,370 --> 00:35:13,370 human eye. 492 00:35:14,500 --> 00:35:18,340 Sensors on the landers have also brought back vital information that could 493 00:35:18,340 --> 00:35:22,240 confirm the root of the lifeblood current carrying nutrients from the 494 00:35:22,240 --> 00:35:23,880 oceans to the rest of the world. 495 00:35:24,240 --> 00:35:29,240 The data is dispatched to the British Antarctic Survey in the UK, where a team 496 00:35:29,240 --> 00:35:31,260 have been tracking the current at shallower depths. 497 00:35:31,620 --> 00:35:35,680 The data we've been very kindly given confirm that this is Antarctic bottom 498 00:35:35,680 --> 00:35:38,100 water in there, that it is going through this trench. 499 00:35:38,320 --> 00:35:40,700 The actual flow through it is... 500 00:35:41,070 --> 00:35:44,530 tens of times the flow of the Amazon, millions of tons a second. 501 00:35:44,910 --> 00:35:48,550 It's a breakthrough that will be vital for future scientific work. 502 00:35:48,770 --> 00:35:52,550 We can measure the water's flowing through to see any change, see any 503 00:35:52,550 --> 00:35:56,010 that are happening before it spreads out across the whole of the world's ocean 504 00:35:56,010 --> 00:36:00,190 floor. These very deep data are going to be very valuable for a long time. 505 00:36:01,710 --> 00:36:02,890 Okay, I think that's a wrap. 506 00:36:04,130 --> 00:36:05,130 Surfacing weight release. 507 00:36:05,730 --> 00:36:08,290 And we're heading up. 508 00:36:16,110 --> 00:36:20,330 Two and a half hours after leaving the bottom, Victor is now approaching the 509 00:36:20,330 --> 00:36:25,550 surface. But after his radio and cameras cut out in the cold, he has no way of 510 00:36:25,550 --> 00:36:27,770 knowing if there's an iceberg in his path. 511 00:36:28,290 --> 00:36:33,450 If there is, the sub could be pinned beneath the ice with no way out. 512 00:36:53,640 --> 00:36:54,640 It's going to come up slow. 513 00:36:55,760 --> 00:36:56,760 Hope I don't hit an iceberg. 514 00:36:57,600 --> 00:36:59,280 If I hear a thump, I'm stopping quick. 515 00:37:01,120 --> 00:37:05,400 Going up. Just be patient. 100 meters to go. 516 00:37:07,400 --> 00:37:09,620 LF, comms check on VHF. How do you read? 517 00:37:10,460 --> 00:37:11,520 Yeah, do you have a visual? 518 00:37:46,970 --> 00:37:48,170 Welcome back, Victor. 519 00:37:48,510 --> 00:37:50,250 Thank you, gentlemen. It's good to be back. 520 00:37:50,610 --> 00:37:52,930 Xeno is inbound. Should be there any minute. 521 00:37:53,690 --> 00:37:55,010 Roger that. Xeno inbound. 522 00:37:55,250 --> 00:37:59,330 We had some comm issues, but we're going to talk about that after. Just glad to 523 00:37:59,330 --> 00:38:00,430 have you back on the surface. 524 00:38:01,050 --> 00:38:02,590 And that's rigging for recovery. 525 00:38:03,570 --> 00:38:07,430 Roger that. Comes for a problem, but mission was a success. 526 00:38:07,810 --> 00:38:10,710 Indeed it was. Indeed it was, sir. Great job. 527 00:38:11,130 --> 00:38:12,129 Thanks, sir. 528 00:38:12,130 --> 00:38:13,990 Just nice and slow. Nice and slow. 529 00:38:14,670 --> 00:38:19,670 The sub may be safely back on the surface, but there's a final challenge 530 00:38:19,670 --> 00:38:22,430 overcome in the volatile waters of the Southern Ocean. 531 00:38:22,770 --> 00:38:23,790 Ride that thing, Steve. 532 00:38:24,110 --> 00:38:25,110 Good. 533 00:38:26,150 --> 00:38:31,010 Oh, that was a big wave, guys. The LF does not like... being on the surface. 534 00:38:31,230 --> 00:38:32,730 It's designed to just die. 535 00:38:32,970 --> 00:38:34,590 Get to the bottom, get there quickly. 536 00:38:35,270 --> 00:38:38,930 And she's like a wild horse, like you can try to put a rope on it, and it just 537 00:38:38,930 --> 00:38:39,930 fights you, right? 538 00:38:44,730 --> 00:38:45,730 Up on the main? 539 00:38:49,730 --> 00:38:50,729 Yes, Steve. 540 00:38:50,730 --> 00:38:51,730 You're down on the main? 541 00:38:54,370 --> 00:38:56,130 Go on, Steve. Go, go, go, go. 542 00:38:56,570 --> 00:38:57,570 Go on, Steve. 543 00:38:57,930 --> 00:38:58,930 Two hands, man. 544 00:38:59,580 --> 00:39:00,900 Up on the main. Up on the main. 545 00:39:03,580 --> 00:39:04,760 That's good. That's good, Patrick. 546 00:39:09,560 --> 00:39:09,860 Good 547 00:39:09,860 --> 00:39:17,600 job, 548 00:39:17,700 --> 00:39:18,700 buddy. 549 00:39:18,980 --> 00:39:19,980 Yep. 550 00:39:20,580 --> 00:39:22,060 How you doing, Steve? You want to get off there? 551 00:39:22,320 --> 00:39:23,520 I can jump in there and do this. 552 00:39:24,300 --> 00:39:25,300 Steve, let's get you off. 553 00:39:25,540 --> 00:39:26,600 No, he sees people. 554 00:39:38,030 --> 00:39:39,030 Hang in there, buddy. 555 00:39:42,370 --> 00:39:43,630 Steve, let's get you off. 556 00:39:44,070 --> 00:39:49,390 To prevent the onset of hypothermia, the expedition doctor must bring Steve's 557 00:39:49,390 --> 00:39:50,610 body temperature back up. 558 00:39:50,930 --> 00:39:54,470 He sat him down next to the heating duct in the sub's hangar. 559 00:39:55,850 --> 00:39:58,930 Finally, Steve's warm enough to be moved inside. 560 00:40:07,660 --> 00:40:09,040 Good work, man. Good work. 561 00:40:09,900 --> 00:40:12,720 I've lived on the topic of Capricorn my whole life. 562 00:40:13,060 --> 00:40:14,360 That's close to the equator. 563 00:40:14,620 --> 00:40:16,180 I don't do cold water. 564 00:40:28,300 --> 00:40:29,300 Thank you, Mr. 565 00:40:29,320 --> 00:40:30,520 Caldwell. Welcome back, mister. 566 00:40:30,780 --> 00:40:31,780 Thank you. Good to be back. 567 00:40:32,180 --> 00:40:33,180 Yeah! 568 00:40:34,700 --> 00:40:35,820 Great job, team! 569 00:40:37,450 --> 00:40:40,450 At last, Victor is safely back on board. 570 00:40:41,190 --> 00:40:45,230 He's now the only person to have reached the deepest point of the Southern 571 00:40:45,230 --> 00:40:48,690 Ocean, the second of his five deeps. 572 00:40:50,290 --> 00:40:51,290 Good to be back. 573 00:40:51,450 --> 00:40:52,650 Good to have you back. 574 00:40:54,470 --> 00:40:58,250 Some interesting moments and feeling quite alone in the middle of the 575 00:40:58,250 --> 00:41:00,630 Ocean, but we got it done. It's going to be back. 576 00:41:02,190 --> 00:41:04,230 All right. It's kind of cold. 577 00:41:10,720 --> 00:41:15,340 This is a very high -tech machine that we took to a very inhospitable place, 578 00:41:15,340 --> 00:41:16,340 it was extraordinary. 579 00:41:17,500 --> 00:41:21,180 We're doing it because we're explorers, because we want to see. 580 00:41:22,680 --> 00:41:25,880 We want to push the boundaries. We want to learn things that haven't been 581 00:41:25,880 --> 00:41:29,680 learned before, and we want to do it together and bring it back and share it 582 00:41:29,680 --> 00:41:30,680 with other people.