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