0:00:06 > 0:00:09Pyrosome to Aronnax.
0:00:09 > 0:00:11Nektons, are you reading me?
0:00:11 > 0:00:14Commander Pyrosome, to what do we owe this pleasure?
0:00:14 > 0:00:16I have a question for Kaiko.
0:00:16 > 0:00:18For me?
0:00:18 > 0:00:22I know it's unprecedented, but you're the most accomplished marine
0:00:22 > 0:00:25- biologist I know.- Was that flattery?
0:00:25 > 0:00:27I don't flatter, ever.
0:00:27 > 0:00:30The scientific arm of the World Oceans Authority is very
0:00:30 > 0:00:33concerned about some sea life we've been monitoring with trackers.
0:00:33 > 0:00:35Once, I put a tracker on a sea snail for a whole year!
0:00:35 > 0:00:38We know. It moved three metres.
0:00:38 > 0:00:39It was science.
0:00:39 > 0:00:43These dots are the individuals being tracked, but for each individual,
0:00:43 > 0:00:45there can be hundreds in a school.
0:00:45 > 0:00:47They're all grouping together?
0:00:47 > 0:00:49And we have no idea why.
0:00:49 > 0:00:51What sort of fish?
0:00:51 > 0:00:54All kinds - bass, rays, and not just fish.
0:00:54 > 0:00:56Dolphins, turtles, seals.
0:00:56 > 0:00:58They've got nothing in common.
0:00:58 > 0:01:00Maybe they overcame their differences and formed
0:01:00 > 0:01:01a football team.
0:01:01 > 0:01:04At first, we thought they'd all been sucked into a fast,
0:01:04 > 0:01:06warm-water current, but no.
0:01:06 > 0:01:09Sorry, football is silly. Water polo, maybe?
0:01:09 > 0:01:11Ant, be serious.
0:01:11 > 0:01:15OK, so they're running away from something like a Fontaine?
0:01:16 > 0:01:20Ugh. Commander, how can a turtle travel as fast as a dolphin?
0:01:20 > 0:01:22That is the question.
0:01:22 > 0:01:24Hmm.
0:01:24 > 0:01:27Commander Pyrosome, we'll take the case.
0:01:27 > 0:01:29Well, I only wanted advice.
0:01:29 > 0:01:32Sorry, you've got us intrigued. It's too late now, we're in.
0:01:32 > 0:01:33All right!
0:01:40 > 0:01:44My family are explorers, we have been for generations.
0:01:44 > 0:01:47While others look up to the stars, we know there are an infinite number
0:01:47 > 0:01:49of things that shine in the darkness below.
0:01:49 > 0:01:54There are things lurking in the seas that long ago vanished into myth.
0:01:54 > 0:01:58My family are explorers and we explore the deep.
0:02:15 > 0:02:18I'm getting a signal from the WOA trackers now.
0:02:20 > 0:02:25Amazing. I've never seen so many species of fish that close together.
0:02:25 > 0:02:27It's like they're right on top of each other.
0:02:27 > 0:02:30That's weird. Let's ask the other fish expert.
0:02:32 > 0:02:34Please! You're asking Jeffrey?
0:02:34 > 0:02:38Of course! Jeffrey, why would perfectly sensible fish from all
0:02:38 > 0:02:41different species run away from home together?
0:02:42 > 0:02:45Right, mm-hm, uh-huh.
0:02:45 > 0:02:47- Jeffrey has a theory!- He's a fish.
0:02:47 > 0:02:50Exactly, with unique insights into fish motivation.
0:02:50 > 0:02:53And Jeffrey favours the circus theory.
0:02:53 > 0:02:56They ran away to join the circus?
0:02:56 > 0:02:59Of course! Don't tell me you haven't thought about it?
0:02:59 > 0:03:02The group have slowed down at a commercial tuna farm
0:03:02 > 0:03:05- about five nautical miles ahead.- Hmm.
0:03:05 > 0:03:07Maybe they're all hungry.
0:03:07 > 0:03:09Oh, silt everywhere.
0:03:09 > 0:03:12What could have churned up the water like this?
0:03:12 > 0:03:16I'm not sure. but our visibility is limited.
0:03:16 > 0:03:18Something else on sonar.
0:03:18 > 0:03:19Slowing engines.
0:03:21 > 0:03:23The signal's gone. No, it's back.
0:03:27 > 0:03:29Huh, that's weird. It just moved.
0:03:29 > 0:03:32Maybe it's all these germ particles messing with the signal.
0:03:32 > 0:03:35Let's not take chances. Coming to port, ten degrees.
0:03:38 > 0:03:41- Hmm, up ahead. What?- Nets everywhere!
0:03:41 > 0:03:42Look out!
0:03:42 > 0:03:44Hold on!
0:03:47 > 0:03:49Argh! Argh!
0:03:50 > 0:03:52There's more! Full reverse, brace yourselves!
0:04:04 > 0:04:06That can't be a good sound.
0:04:06 > 0:04:07It's the propellers.
0:04:10 > 0:04:13That's it. We're officially dead in the water.
0:04:16 > 0:04:18What could have done this?
0:04:18 > 0:04:20Maybe the tuna who were captured did it?
0:04:20 > 0:04:24The tuna all just ran away to join the migration?
0:04:24 > 0:04:26Yes, a massive tuna jailbreak!
0:04:26 > 0:04:29OK, big pull... Now.
0:04:35 > 0:04:37Come down, Jeffrey, everything's fine.
0:04:39 > 0:04:42Nektons, we have a strange development.
0:04:42 > 0:04:44Another cluster of sea creatures is forming.
0:04:44 > 0:04:46Again, it's all different kinds.
0:04:46 > 0:04:48Another cluster?
0:04:48 > 0:04:50That's interesting.
0:04:50 > 0:04:54- Where?- Around 20 nautical miles south-east of you.
0:04:54 > 0:04:57Will, you and Fontaine keep following the original group.
0:04:57 > 0:04:58They're moving slower now.
0:04:58 > 0:05:00- You should be able to catch up to them quickly.- Right.
0:05:00 > 0:05:04- We'll try to get a look at this new group.- Thank you.
0:05:04 > 0:05:05- You'll be OK?- We're good to go.
0:05:17 > 0:05:19Wow, these new guys are fast.
0:05:19 > 0:05:21But the Aronnax is faster.
0:05:21 > 0:05:23We should have a visual in about six minutes.
0:05:29 > 0:05:32Wait, our group is diving fast!
0:05:32 > 0:05:37Hold on!
0:05:37 > 0:05:40I don't get this. Some of the creatures in this group can't
0:05:40 > 0:05:43- possibly dive this deep.- Maybe they have a submarine?
0:05:44 > 0:05:46That's not a serious suggestion.
0:05:49 > 0:05:51Will, your group has stopped descending.
0:05:51 > 0:05:54- They've turned back.- Roger that, we're monitoring.
0:05:54 > 0:05:57In fact, they're heading straight for us.
0:05:57 > 0:05:59Keep your eyes peeled.
0:05:59 > 0:06:01Sonar's locked on a solid object.
0:06:01 > 0:06:05- What object?- I don't know. But it's closing fast!
0:06:05 > 0:06:10They're coming straight at you. Turn, Will, now!
0:06:10 > 0:06:12The animals aren't travelling together.
0:06:15 > 0:06:17They were eaten!
0:06:17 > 0:06:18Megalodon!
0:06:19 > 0:06:20Argh!
0:06:22 > 0:06:24Aronnax to Rover, come in!
0:06:24 > 0:06:26Aronnax to Rover!
0:06:26 > 0:06:29Dad, come on, answer!
0:06:29 > 0:06:31Aronnax to Rover, come in!
0:06:31 > 0:06:33Will, Fontaine, we're coming.
0:06:33 > 0:06:35Talk to me! Where are they?!
0:06:37 > 0:06:41Ah, 2.1 nautical miles ahead. Bearing 117, we're closing fast.
0:06:41 > 0:06:44- Rover to Aronnax, can you hear me? - Dad!- Will!
0:06:44 > 0:06:46Why weren't you answering?
0:06:46 > 0:06:50We're inside a megalodon holding on to its gills.
0:06:53 > 0:06:54We're slipping!
0:06:54 > 0:06:55Full thrusters!
0:06:58 > 0:06:59Argh!
0:06:59 > 0:07:00Ah!
0:07:04 > 0:07:06- Yes!- Got it! We're stable for the moment.
0:07:06 > 0:07:09But there's a constant flow of water pressing against us, Mum.
0:07:09 > 0:07:11We can't fight against it!
0:07:11 > 0:07:13We can't force our way out.
0:07:13 > 0:07:14We'll be there in 30 seconds.
0:07:15 > 0:07:17We'll try to hold on.
0:07:21 > 0:07:23If we keep slipping...
0:07:25 > 0:07:26Mum, please hurry!
0:07:31 > 0:07:33Should be getting close to a visual.
0:07:33 > 0:07:36Wow! Incredible!
0:07:36 > 0:07:38So cool!
0:07:38 > 0:07:40It's immense.
0:07:40 > 0:07:41Maybe 40 metres long.
0:07:49 > 0:07:50We're coming up on it now.
0:08:00 > 0:08:06Argh! No! Argh!
0:08:08 > 0:08:10Will, Fontaine, what just happened?
0:08:11 > 0:08:14Whatever that sudden move was, it dislodged us.
0:08:14 > 0:08:18- The megalodon reacted when it saw us.- Then move away, now!
0:08:18 > 0:08:21It probably sees you as a rival. Don't antagonise it.
0:08:21 > 0:08:22Understood.
0:08:37 > 0:08:39What have you got?
0:08:39 > 0:08:42That thing should have been extinct for 2.6 million years!
0:08:42 > 0:08:44Something practical, Ant.
0:08:45 > 0:08:48Um... Its closest living relative is the great white shark.
0:08:48 > 0:08:50Megalodon was the single biggest predator on the planet.
0:08:53 > 0:08:55We're listening here.
0:08:55 > 0:08:57Was that supposed to cheer us up?
0:08:57 > 0:08:59Related to the great white...
0:08:59 > 0:09:02- Great whites are constantly moving, remember?- So, what?
0:09:02 > 0:09:04So, the water flow isn't going to stop!
0:09:04 > 0:09:06Which means we can't get out?!
0:09:08 > 0:09:11Unless we can stop the megalodon from moving.
0:09:11 > 0:09:12Listen, these things would never
0:09:12 > 0:09:14expect anything to challenge them head-on.
0:09:14 > 0:09:17I don't think crashing into it is going to stop it from
0:09:17 > 0:09:19swallowing half our family.
0:09:19 > 0:09:23No, we turn off our lights then come at it, head-on, fast.
0:09:23 > 0:09:25And at the last second, we blast it with the lights,
0:09:25 > 0:09:26strobes, everything!
0:09:26 > 0:09:30So, we'd shock it and stop it without hurting it and, hopefully,
0:09:30 > 0:09:33the Rover would be able to get out.
0:09:33 > 0:09:35- Uh-huh.- It's a big gamble.
0:09:41 > 0:09:44It sounds like the only gamble we have.
0:09:44 > 0:09:46OK. Ant, turn off the lights.
0:09:46 > 0:09:48I'll get us ahead of this creature.
0:10:04 > 0:10:05Coming around.
0:10:08 > 0:10:11We both need to time this perfectly, so be ready, Ant.
0:10:11 > 0:10:12Accelerating...
0:10:18 > 0:10:20I'll wait till the last second.
0:10:20 > 0:10:21Will and Fontaine, when it stops,
0:10:21 > 0:10:24hopefully it'll open its mouth and then gun your engines.
0:10:24 > 0:10:27OK. Fontaine, be ready to let go with the arms.
0:10:28 > 0:10:29I'm ready.
0:10:34 > 0:10:35Get ready, Ant.
0:10:35 > 0:10:38LOUD BEEPING Huh?
0:10:38 > 0:10:40- Proximity alert.- What?
0:10:40 > 0:10:41There's something else out there.
0:10:46 > 0:10:48Mum, it's another group. It's another megalodon!
0:10:52 > 0:10:54Oh!
0:10:55 > 0:10:57Argh!
0:11:05 > 0:11:08Will, there are two megalodons. Repeat, two of them.
0:11:13 > 0:11:17We heard. I'm not sure if we can hold on for much longer.
0:11:17 > 0:11:20- Don't lose hope.- I'm trying not to.
0:11:32 > 0:11:34OK, new plan.
0:11:34 > 0:11:35We get a steel cable.
0:11:35 > 0:11:37Super strong. Excellent choice.
0:11:37 > 0:11:39And we loop it around the megalodon.
0:11:39 > 0:11:42Once it's fastened, we reverse the Aronnax and bring the
0:11:42 > 0:11:43shark to a stop.
0:11:43 > 0:11:47Wait, wait, wait! You want to lasso a megalodon?
0:11:49 > 0:11:51It sounds crazy, doesn't it?
0:11:51 > 0:11:52Erm, yeah.
0:11:52 > 0:11:56But it's times like these - I know I'm related. It's brilliant.
0:11:56 > 0:11:58Come on!
0:12:18 > 0:12:20OK, getting a little too intense here.
0:12:24 > 0:12:27We'll need a knight to get that close, to loop it over.
0:12:27 > 0:12:29- You're not going out. - In the Magknight.
0:12:29 > 0:12:31It's the strongest.
0:12:31 > 0:12:34I'm going along with your plan here but you need a knight.
0:12:34 > 0:12:37- I'll go out.- Mum, you need to pilot the Aronnax.
0:12:37 > 0:12:41I'm not that skilled and Jeffrey is an amateur at best.
0:12:41 > 0:12:45It's hard to drive a submarine when you don't have opposable thumbs.
0:12:45 > 0:12:49No-one pilots better than you, so it has to be me out there.
0:12:49 > 0:12:50I absolutely hate it.
0:12:50 > 0:12:53Dad and Fontaine need it to happen now.
0:12:53 > 0:12:55What if the other megalodon gets involved?
0:12:55 > 0:12:57It's clearly protecting its mate.
0:12:57 > 0:12:59If it spots me, I'll get out of there.
0:12:59 > 0:13:01SHE SIGHS
0:13:02 > 0:13:03Please stay safe.
0:13:07 > 0:13:10This better work, big guy.
0:13:27 > 0:13:29Will, I'm leaving this channel open.
0:13:29 > 0:13:31You'll need to move fast when we do this.
0:13:31 > 0:13:34Er, I have a giant shark stomach behind us as motivation.
0:13:34 > 0:13:36We'll move faster than we ever have before.
0:13:36 > 0:13:38- Count on it.- Excellent.
0:13:38 > 0:13:41Then we'll release the cable before the animal gets hurt.
0:13:41 > 0:13:43Ant, let's do this.
0:13:43 > 0:13:45Getting into position now.
0:13:52 > 0:13:54OK, Ant, I'm moving closer.
0:14:06 > 0:14:08Your speed is good. Ready to drop.
0:14:09 > 0:14:12Let's count it down, Ant. We need to time it just right.
0:14:12 > 0:14:17OK, dropping in five, four, three, two, one.
0:14:23 > 0:14:24Uh-oh! He knows I'm here!
0:14:27 > 0:14:30Do we have an even bigger knight?
0:14:30 > 0:14:34Oh!
0:14:34 > 0:14:37- Be ready. Stay alert.- It's not like I'm relaxing here, Dad.
0:14:39 > 0:14:40Ant, are you all right?
0:14:40 > 0:14:44Am I all right? I'm riding an extinct mega monster.
0:14:44 > 0:14:48This could be the single greatest moment of my life. Woohoo.
0:14:48 > 0:14:51Ant, half of your family is about to be eaten.
0:14:51 > 0:14:52And working on saving you!
0:14:58 > 0:15:01Whoa! Argh!
0:15:04 > 0:15:06- Ant!- What's happening?- I'm OK, I'm OK.
0:15:06 > 0:15:09I just have to... OK, this isn't good.
0:15:13 > 0:15:17- Ant!- What happened?- Whoa!
0:15:18 > 0:15:21Whoa!
0:15:21 > 0:15:26Things just got a little more complicated.
0:15:26 > 0:15:29- Ant?- Don't worry, Mum, just get ready to pull.
0:15:31 > 0:15:33I need you looking the other way.
0:15:35 > 0:15:36Come on, come on.
0:15:39 > 0:15:40- Well done.- Go for it.
0:15:42 > 0:15:44Will and Fontaine, get ready.
0:15:44 > 0:15:46I'm going into full reverse...
0:15:47 > 0:15:49..now!
0:15:56 > 0:15:58Fontaine, release now!
0:16:06 > 0:16:08We're out! Mum, we're...
0:16:08 > 0:16:10- Dad?- Oh, come on.
0:16:14 > 0:16:17Get out of there! Everyone, back to the Aronnax.
0:16:31 > 0:16:33Oh!
0:16:34 > 0:16:38That pull was too hard. The cable release is jammed.
0:16:38 > 0:16:39We'll need to cut it with our laser.
0:16:39 > 0:16:42Ant, get back to moon pool.
0:16:54 > 0:16:56- What just happened?- We lost the prop.
0:16:56 > 0:16:58We're only running at 50%.
0:16:58 > 0:17:00I'll get the megalodon off your tail.
0:17:00 > 0:17:02No, Ant!
0:17:05 > 0:17:06We can't keep up with the descent.
0:17:06 > 0:17:09We'll have to log onto the Aronnax magnetically.
0:17:11 > 0:17:12Do it as quickly as you can, Fontaine.
0:17:12 > 0:17:14We've got one shot at this.
0:17:14 > 0:17:16Steady, steady.
0:17:16 > 0:17:19We're out of position. Can you keep us straight?
0:17:19 > 0:17:23I'm trying but it's nearly impossible with one engine down.
0:17:23 > 0:17:26We're out of time. Lock on.
0:17:26 > 0:17:27Attached.
0:17:40 > 0:17:42I can't cut the cable.
0:17:42 > 0:17:43We're too far off target.
0:17:44 > 0:17:47- Ant, can you just...- I'm kind of busy here, Fontaine.
0:17:48 > 0:17:51I got company. And this company wants to eat me.
0:17:53 > 0:17:56That's it. This company wants to eat me.
0:17:56 > 0:17:59- Yes!- How is that a thing to be happy about?
0:17:59 > 0:18:02Mum, I need you to go full throttle on the Aronnax.
0:18:02 > 0:18:04And get that cable extra tight.
0:18:04 > 0:18:05What are you planning here, Ant?
0:18:05 > 0:18:07Trust me.
0:18:07 > 0:18:08SHE SIGHS
0:18:25 > 0:18:27Ant, what are you doing?
0:18:27 > 0:18:29Don't stop. It's right on top of you.
0:18:29 > 0:18:33I know. I have a giant set of razor-sharp teeth chasing me, Mum.
0:18:33 > 0:18:35We may as well use them.
0:18:35 > 0:18:36Come on, big guy.
0:18:36 > 0:18:38Don't I look tasty?
0:18:40 > 0:18:43- That's right. Come get me.- Ant!
0:18:50 > 0:18:54- ALL:- Whoa!
0:19:06 > 0:19:09- Wow!- Everyone back inside.
0:19:09 > 0:19:11Let's leave these two alone.
0:19:16 > 0:19:19These pictures were taken INSIDE the megalodon's mouth?
0:19:19 > 0:19:21What can I say? We're thorough.
0:19:21 > 0:19:24We've determined they are a male and a female.
0:19:24 > 0:19:25They were meeting to mate.
0:19:25 > 0:19:28They just needed to eat a lot before that.
0:19:28 > 0:19:29And they really don't care what they eat.
0:19:29 > 0:19:33Whereas I'm very discerning and Jeffrey, huh, is totally picky.
0:19:35 > 0:19:38Unlike great whites, these creatures work together.
0:19:38 > 0:19:40They may even partner for life.
0:19:42 > 0:19:45But they're supposed to be extinct.
0:19:45 > 0:19:48It's not the first time humanity thought a creature was extinct
0:19:48 > 0:19:52- when it wasn't.- True, but why haven't we found megalodons
0:19:52 > 0:19:55- before this? - Technology improves all the time.
0:19:55 > 0:19:58And maybe they usually stay in secluded areas.
0:19:58 > 0:19:59Very secluded.
0:19:59 > 0:20:01The tracker signals have vanished completely.
0:20:01 > 0:20:05That's good. They must have returned to somewhere very deep.
0:20:05 > 0:20:09But what can we do if they ever come back?
0:20:09 > 0:20:11Do you really want to think about that?
0:20:11 > 0:20:12Aronnax out.
0:20:14 > 0:20:18Hm, what can we do? Personally, I never want to have to use myself
0:20:18 > 0:20:20as a giant shark lure again.
0:20:20 > 0:20:24They've lived here untouched and untroubled for millions of years.
0:20:24 > 0:20:27All we can do is be ready if we encounter them again
0:20:27 > 0:20:31and stay out of their way. The sea is their home.
0:20:31 > 0:20:34We should respect the biggest predators in the ocean.
0:20:34 > 0:20:36Who knows what they could be protecting us from.