Original subtitles

The sounds we picked up were concentrated

in the Arctic and the Antarctic.

Logic dictates that a person, or animal,

is more likely to send messages from the places they frequent the most.

And I think we can assume the same for the yrr.

Are you suggesting that the yrr have some sort of home?

I don't think that we have enough information to assume that.

We can assume that the yrr just like any highly evolved marine species

have a breeding ground and if they do, it's probably not a single site,

it's probably several to ensure survival.

Which you believe would also be in the Arctic or the Antarctic?

We do.

If there is a breeding ground,

we expect it would require high ambient pressure

that would be essential to their reproductive biology.

My guess, from what we've seen here to date,

is that it would be a minimum of five to 5.5km down.

Okay, Charlie. You're up.

Given the decline in sea ice,

several areas in the Arctic have become more accessible

from the world above.

One of these areas is the Molloy Deep.

Which is just over 5.5km in depth,

and is one of the areas where Sam picked up the most signals.

The yrr could have been living at these ocean depths for tens,

even hundreds of millions of years.

Undisturbed and unknown...

Think we should plot a course to the Molloy Deep?

We do.

The ice scatters and absorbs sound,

so we need to see if our equipment is strong enough

to broadcast through it.

We should start seeing some ice when we enter the Arctic Ocean,

We can run the tests now.

We can take the HOV out for a test run at the same time.

Before we meet this thing, we better be ready for it.

In addition to the interviews with all onboard,

you will be keeping written logs as well.

Yes.

I'll upload the interviews at end of day to your server.

Along with the next-of-kin,

emergency contact details of all onboard.

I'm sure their families will appreciate it.

I'll upload the written logs at the same time.

I hope I will never need them, but...

in the event you don't return,

the record of Dr Johanson's mission

and all you who joined it must be preserved.

For the information it contains, and the history we create.

We have cameras on the main deck, engine room, hangar,

anywhere on the ship there's activity,

so we can keep an eye on what's going on during deployments,

catch problems before they happen.

If you wanna take a look at the footage,

if you wanna use it in your reports, you clear it with me.

I will.

Please.

If you want to film the crew, you ask me.

If you wanna film in a cabin,

the galley, elsewhere on the ship,

you ask me.

Yes, sir.

Life on a ship's a fishbowl,

even without cameras poking into everyone's business.

-Understood? -Understood.

Mr Kofi, 79 degrees, 8.12 minutes North, 02 degrees 49.0 East.

Roger that, Captain.

One question.

When am I getting an interview with you?

As soon as I find a moment.

And when exactly will that be?

Maybe tomorrow I'll find time.

I'll hold you to that.

And it's "Yes, Captain", not "Sir".

Yes, Captain.

We established that the signal we picked up

is likely to have come from an "intelligence".

The challenge now is to let them know we can hear them.

And if they respond, to create the building blocks

by which we can communicate.

But given the increasing severity of the attacks,

there's a pretty good chance we'll die before we get to do that.

Can you try and be a bit less...

-What?

Defeatist?

Why sugar coat it?

Maybe say something like, um...

"The mission isn't without its dangers,

and we're working hard to ensure..."

Why don't you write the lines, and we'll say them for you.

It's supposed to be natural.

I was being natural.

We know that the yrr are somehow altering the morphology

and behaviour of the species they enter.

We think it's something to do with the nervous system.

First thing we need to do

is run an analysis of the nervous tissue of the mussels,

of the whale, the lobsters, the crabs infected by the yrr.

And if you're right?

That the yrr are altering species they enter to make them attack?

Then we figure out a way to reverse the process.

I did my underwater vehicle training two years ago, on an old rescue sub.

Fundamentals are the same.

This one just has a few more bells and whistles,

courtesy of Mifune Enterprises.

-So why you? -Why me what?

Why do you get to make the movie?

-I volunteered.

So you know, I look better from the left.

I'll keep that in mind.

Can we get back to this?

Check for leftovers in the galley.

Sure, I'll head below.

-I'll take a look. -Thanks.

What's that?

Engineering, what's with the PS?

Generator output shows okay.

Supplies all look fine.

Is Riku coming?

He's a little under the weather.

Cecile's given him something to calm his stomach.

You get used to the rolling sensation.

Takes time though.

-You're okay? -Me? Mm.

I'm fine. Iron stomach.

When I was in high school, I worked in a Japanese theme park.

The money was not great, but the rides were free.

If I wanted to have any fun I'd have to get over the motion sickness.

I also learned to get over the terrible theme park food.

To be honest, when I first saw your ICPO presentation,

I thought you were all mad.

An intelligent life force, living in the ocean, all this time...

So why'd you come?

Mr Mifune.

He convinced me.

And I've learned not to doubt his instincts.

-How long have you worked for him? -Fourteen years.

I heard his talk at my university,

about how renewables would power the world of tomorrow.

His companies were already pivoting, ahead of other energy giants.

Well ahead of... everyone.

I introduced myself, and said when I graduate I'm going to work for you.

I'd be at the forefront, not the rearguard of any profession I chose.

So, if it turns out he's right, that you are right...

I want to be here for it.

I think we need a better name for the yrr.

If we find them, and tell the world what we've discovered,

it's got to be something people can remember.

Something they can pronounce.

I think we've got more important things to worry about.

The world's just changed.

Tell me what's more important than that?

Now that we have isolated the cross-section

of the messages we picked up,

the next step is to broadcast those messages back to the yrr.

Then we add a spike of our own.

The cry of a human baby.

A small but distinct change in the signal,

so they know we're not just playing their signal back.

Now, if we get anything back,

and it includes our spike,

we'll know that they heard us.

-You see the area which is glowing? -Yes.

It indicates an abnormally high level of glutamate,

which suggest the yrr are going after

the NMDA receptors on the nerve cells.

-NMDA? -N-methyl-D-aspartate.

NMDA receptors regulate behaviour.

Think of them as satellite dishes,

which communicate with every corner of the nervous system,

informing the body on how to react.

Excuse me.

Glutamate is an NMDA receptor stimulant.

Which if we're right, the yrr are somehow injecting into the species

to take control of them, like...

a puppeteer pulling the strings of its puppets.

Or an army...

marching to its orders.

-I heard you're going out. -Mhm.

While Sam runs her comms test.

Captain wants to make sure this floats.

-Is that fresh? -I just made it.

We need to make sure it can dive to the depth

where you think this thing might be living.

Who's going out with you?

I'm going alone.

Didn't you say you just made this?

Yes. I didn't say it was good.

You're a scientist, you measure things...

That's chemistry. I'm a biologist.

There are others on board who can make coffee.

Last I checked, I was the only other one here

with any training in an HOV.

Thought it was a busted up rescue sub.

All the more reason to come with you.

I can learn something new.

Okay.

And when we get back...

-You can teach me to make coffee. -Yeah.

Dead slow ahead, Mr Kofi, then stop engines.

Comms, start broadcast. I repeat, start broadcast.

Here we go.

-Ready? -Ready.

All systems go, ready for descent.

Watch your head.

Requesting connection, HOV to bridge.

-Roger that. -All set. Go with engine one...

two... three... five...

Eighty percent.

Releasing into the pool.

Venting air from tank.

Opening lower doors.

-Mind if I watch? -Fine with me.

-Captain? -Watch, yes. Film, no.

You'll have to talk to me sometime.

-Later. -When?

Later.

Levelling off at 1,500 metres.

What's that?

I have no idea.

Can you see anything?

No.

-Comms... -There's something on the sonar.

A mass of some kind.

We'll take a look.

We've got something.

The others should hear this.

Bridge, our CO2 scrubber fans have failed.

We're running out of fresh air.

Switching to back-up.

Bridge, do you copy?

Bridge, do you copy that?

Luther, do you see anything?

Anything?

-Luther, do you copy? -What's going on?

Look, Sam and Leon picked up a signal coming in

at the same time we picked up something on the sonar.

-Do they have any idea what it is? -No.

But whatever it is, it's getting closer.

We abort.

Not yet! I think something is out there.

HOV, do you have a visual?

Do you copy?

Jasper, call them back.

Now.

Luther, return to ship.

I repeat, return to ship.

-Luther. Luther, do you copy? -Captain, we've lost contact.

Tell Sam and Leon to stop broadcasting.

Comms, cease broadcast.

I repeat, cease broadcast.

We cut the broadcast, but the signals still coming in...

Sorry, fuck it. We are getting out of here.

...on final approach.

Okay, copy that. Open the lower doors.

Open lower doors.

HOV coming back on board.

-Close the lower doors. -Closing lower doors.

HOV is back on board.

Is the signal you received the same as you sent out?

It's been modulated and compressed, but yes, it's the same.

Except for... the baby's cry.

Which has been changed.

Why?

To show us that whoever, or whatever, sent the message

understands what we did, and is replying in kind.

We have contact?

We do.

Thank you, Sara.

-What are you working on? -I was thinking about what you said

about an army marching to their orders of the yrr.

If we are right that the yrr are using glutamate

to stimulate the nervous system of the animals they take over,

I was wondering if we can find something to depress it, you know?

Are these your children?

Yes. That was last summer.

-They're beautiful. -Thank you.

Do you have children?

No.

I've thought about it.

But to be honest,

even if we survive this...

I think I'd need to consider whether I'd want to bring a child into...

into whatever kind of world this will be.

I couldn't imagine myself as a mother.

It was my ex-husband that wanted them.

But they come along and you can't believe how much you love them.

I remember when Isabelle was little,

standing under the climbing frame as she went higher and higher,

terrified she'd fall, getting ready to catch her...

What nobody tells you...

what no one even thinks to mention is the fear.

You're afraid for them in a way that you could never be for yourself.

And that you would do anything to protect them.

We heard from the captain right before we lost communication.

You didn't see anything?

-Charlie said she did. -Did she say what it was?

Just that there was something out there.

This far North, the water, the ice plays tricks with the light.

-You want my opinion? -Depends.

If you want to see something, you see something.

Particularly, if you have imagination.

Like Charlie, the lot of you, must have, in spades,

to dream up something like the yrr.

So why did you come along?

To see if you were right.

Does this mean I'm good for the rest of the trip?

I promise nothing.

Each line represents the wavelength of the messages we received.

I can stretch or shrink each line...

to create an image,

which I can send out once the captain gives us the go-ahead.

And I'm betting the yrr will be able to understand.

Captain?

Put her on the table.

What is this?

Cerebrospinal fluid.

It means there could be a tear in the membranes

surrounding the brain or spinal cord.

She must have fallen, hit her head.

We need to slow her heart rate, reduce her blood pressure,

stop any cranial swelling.

In the cabinet, there are sedatives.

Pentobarbital, Thiopental...

Can you get me some ice and cooling blankets?

Can you prepare a drip while I administer?

Yes.

Okay...

When the power surged, there was a blast of sound.

Low-frequency, below the lower limit of audibility,

so you wouldn't have heard it.

Was it the same as the blast of sound that came in before?

Yes, but it was much stronger.

Do you know what produced it?

No. But I'm pretty sure it emanated from inside the ship.

Inside the ship?

This time, yes.

Can you send what you have on it?

So we run a check, and see if we can locate the source.

-Now. -Sure.

How's Alicia?

She is... stable.

She going to pull through?

It's just too early to tell.

Is anything we're doing producing an acoustic signal?

Nothing from engineering.

Picked up anything?

Nothing, Captain.

-No gear faults? -No faults, Captain.

Are the ballast tanks trimmed?

They are.

What's that on her arm?

I don't know, it just appeared.

On her arms, legs.

I thought they might be blood clots, but there's no skin discoloration.

It could be a sign of some internal trauma to her nervous system.

Trauma to the nervous system doesn't manifest in that way, does it?

It doesn't. But I don't think we can rule anything out.

I think we should do a Lumbar puncture,

so we can examine the fluid in her spinal column.

You can do that on board?

It's pretty straight-forward.

But I need you to hold her steady during the procedure.

Fine with me.

Sure.

Okay.

Okay.

It's okay.

Done.

I never thought I'd get to see this.

-The Arctic? -The Arctic...

or anywhere 100 miles away from home.

I dreamed about it.

Imagined myself on a ship like this,

looking out at an ocean that I'd never seen.

Being afraid, someone getting hurt...

it wasn't part of the dream.

I spent a lot of time on research vessels, when I was a child,

with my parents.

Where?

Mostly south of the Equator.

New Zealand. Mauritius. Cape Verde.

This your first trip this far north?

This far north, yes.

In the Arctic, no.

They woke me up one night.

A storm.

My mother told me everything was going to be okay.

Put me on a lifeboat, told me to wait for them there.

But...

they never came.

Everybody thinks I should hate the ocean,

be afraid to go anywhere near it, but...

It makes me feel closer to them.

Makes me feel like they're there, keeping me safe...

The slide on the right is an image of Alicia's nerve cells,

taken from her spinal fluid.

The cells are normal, healthy.

The nerve cells on the left are from the same sample,

and are badly damaged.

Do you know what caused it?

You see the white threads?

It's the same substance we found in the animals infected by the yrr.

We think the substance tried to fuse with some of her cells,

the same way it did with them.

The yrr is inside of her?

The yrr or the substance it produces

to take over the nervous system of the species it enters.

So she must have come into contact with them?

It does, yes.

When we were coming back, in the HOV.

I thought I saw something...

-What did you see? -I don't know, but...

whatever it was, I think it followed us back inside.

If it did, it could still be on the ship.

We need to secure the hangar.

We need to run some tests,

not put anyone else's life in danger

until we can figure out what this thing is.

Everybody signed on for this mission knowing they might not return.

Yeah...

When I was in the Navy, every sailor had his list of superstitions.

Always step onto the boat with your right foot.

Never start a voyage on a Friday, or change a boat's name.

Never say "goodbye" when departing.

You know, we all think we can see the world clearly as it is,

but we don't.

We see the world as we need to see it to make our lives liveable.

Never say goodbye and there will be no goodbye.

That's what gets us through.

How is she?

She is in a stable condition.

However, treatment here on board has its limitations.

Does she have a family?

Her mother is listed as her next of kin.

If we can get her to a hospital in Ravenna...

Crabs are coming ashore at the Adria...

This extends to Ravenna.

We will tell her mother there has been an accident

and her daughter is being taken care of.

And will return to Italy when it is safe for her to travel.

We will allow this one exception.

The communication black-out remains in effect.

When we broadcast messages out into space,

we include images of ourselves.

So I thought why not send out something about us and the yrr.

How the sea gave birth to us both.

Evolution.

As I prefer to call it,

a common past.

Okay, let's do it.

Sure.

Need a break?

Couldn't sleep?

No.

Here.

Let me know if you hear anything.

Yeah.

I'll be right outside.

Sam?

Subtitles: Lily Ray plint.com