All language subtitles for Expedition Deep Ocean Series 1 2of5 Southern Ocean 1080p

[Alan] Equipment wise,
and weather wise,

you psychologically
prepare yourself

because with all best intentions

you can plan an expedition
for two years,

and you go there
and it just goes wrong.

[Victor] Sailors
were actually terrified

to come to this area

because it was so dangerous.

And ships did not return.

[Alan] Just watch that arm.

[Kelvin] Up on the towline
a little bit!

[bleep] it!

Oh [bleep]

[Patrick] LF.

LF. Comms check. Comms check.

He didn't hear me.
He didn't acknowledge.

[dramatic music playing]

[Demetri] Humankind has explored

every continent on Earth.

Climbed its tallest mountains.

And even journeyed into space.

[man] Thank you, Mr. President.

[Demetri] But there's a vast
swathe of our own planet

that has remained a mystery.

[dramatic music playing]

[Demetri] The deep ocean.

Stretching down over 35,000
feet into crushing pressures,

it's been near impossible
to reach.

Until now.

New engineering breakthroughs

are driving an audacious
global mission

to dive to the deepest points
of all the five oceans,

for the first time in history.

These pioneers will push
technology to the limit...

- What the hell was that?
- We have a leaking hatch.

[Demetri] ...to open up
this final frontier

as never before.

[Casie] Trying to mentally
put yourself at the bottom

is just mind-blowing.

[Demetri]
Mapping hidden landscapes,

discovering unknown lifeforms.

[Alan] What on Earth is that?

And unlocking the secrets
of how life

in the extreme deep ocean

affects our entire planet.

[dramatic music playing]

[Stuart] Okay, Alan, good to go.

[Alan D] Good to go.

[Demetri] Extreme explorer
and ex-naval commander

Victor Vescovo

is putting his life on the line,

as well as 50 million dollars

of his own money
to pursue his dream.

Good boy.

What little boy or little girl

doesn't grow up
wanting to be an explorer?

And here I am with a wonderful
ship, a great crew,

it's now the deepest diving
submersible in the world

and I get to play
in the ocean with it

and discover things that
have never been seen before.

How could you not be
absolutely ecstatic?

[Demetri] His mission
is to travel to each

of the five oceans,
discover their deepest point

and unlock their
unexplored secrets.

He has already travelled
over five miles down

to the very bottom
of the Atlantic Ocean.

[Victor] Oh, my goodness.
I can see the bottom.

[Demetri] Now he and his team
are heading

for a far tougher challenge.

The Southern Ocean.

It surrounds the frozen
continent of Antarctica.

These are the coldest waters
on the planet

and some of the roughest seas,

making it perhaps
the most dangerous

of all the Earth's oceans.

[Victor] Some of the old-style
maps had "here be dragons"

and sailors were actually
terrified

to come to this area
because it was so dangerous.

And ships did not return.

They would be destroyed.

[suspenseful music playing]

[Demetri] Rising winds
are already testing

the crew and equipment.

Getting a little brisk
out here, all right.

It's lovely. Might have
to take the shorts off.

[laughs] Will have to go
to long pants soon.

[man] Boy, it came up
[bleep] quick, huh?

[Patrick]
Kelvin, you need more straps?

[suspenseful music playing]

[Demetri]
Soon, they're experiencing

a full-scale snowstorm.

[Patrick] [bleep] me.

[Stuart] It should be dead
ahead somewhere.

I'll just lower the starboard
a little bit.

Yeah, I got it.

[Victor] In this life, I'd
rather be lucky than good.

And when it comes to weather,

you definitely want to be lucky.

[Demetri] Victor is worried
about the effects of the cold

on the expedition's vital
navigation equipment.

Batteries look okay.

Modems.

Yeah, these guys did well.

Very strange seeing snow
on my landers.

[Demetri] The snowstorm
has been an early warning

of the treacherous weather
that could lie ahead.

[indistinct radio chatter]

[Demetri] To search for
the ocean's deepest point,

Victor and his team
are heading for a dramatic

underwater chasm called
the South Sandwich Trench.

[Demetri] Over four
and a half miles deep,

its waters drop below freezing

and are under huge pressure.

Five times the crushing power
of a junkyard car compactor.

[Victor]
It's very rarely visited.

And certainly no-one
has ever mapped

the South Sandwich Trench.

Certainly not
with the kind of tools

we will have available.
So in a way,

This is very exciting
for the whole crew

because this is true
exploration.

[Demetri] To protect Victor from

the deadly pressures
at the bottom of the trench,

he has commissioned
a remarkable prototype sub

at a cost of 35 million dollars.

Surrounding the cockpit
is a sphere

of 3.5-inch thick titanium

punctured by wide-angled
view ports made of acrylic.

It's equipped
with enough oxygen tanks

to give him air
for up to four days.

But in the Southern Ocean,
the sub will have to endure

temperatures far colder

than any it's experienced
before.

[Patrick] We'll have
surface temperatures

that are starting at zero,

or one degree, rather than
where we were before

where the surface temperatures

were 25 or 30 degrees Celsius.

At depth, it'll be minus one.

It's enough to affect
our cabling,

our connectors, our batteries.

[Demetri] If the dive succeeds,

the expedition scientists

will be able to hunt
for unknown creatures

of the deep...

[man] Prepare lights on SCAFF.

[Demetri] ...and try to solve

one of the Southern Ocean's
greatest mysteries.

These waters are, in fact,

packed with oxygen and nutrients

vital to life

and are the source
of a global ocean current

that feeds the world.

Scientists are desperate to find

where this lifeblood current

exits the Southern Ocean.

The South Sandwich Trench
is a prime suspect.

But no-one has been able to dive

deep enough to confirm it.

[Oscar] The Southern Ocean,
in my opinion,

is one of the most important
locations on the planet.

It's the lungs of Earth.

[Katherine] It's vital
to global ocean circulation.

So we need to know more.
We want to know more.

[Demetri]
To make their bold attempt,

Victor and his team

only have a short window
of time.

The brief Antarctic summer,

when the pack ice that locks in

over seven million square miles

of ocean,

melts and retreats.

[ice crashes]

[Oscar] If you look
at the Southern Ocean,

every winter we grow

almost the equivalent of the
Continental United States.

And in summer, melt that
entire continent back.

[Demetri] 100 miles away
from the deepest point,

the team sees the chance
of a break in the weather

to take the sub
on an exploratory dive.

It's an opportunity for Chief
Scientist Alan Jamieson

to search for new creatures
of the deep

and for Victor to put the sub
through its paces

in the Southern Ocean's
freezing waters.

In the spotlight
is the sub's designer,

John Ramsay.

[John] Mechanically,
everything is great

at cold temperatures.

It's the electrical issues

with cold circuit boards
and things like that.

Just hoping everything's
gonna be fine for the guys.

[Demetri] First,
the team needs to launch

their 35-million-dollar sub

off the back of a ship being
buffeted by the volatile

Southern Ocean.

[Patrick]
The most dangerous part

of any of our operations

will always be launch
and recovery.

That's when you're dealing

with forces
that are unpredictable,

and managing that
is a difficult thing.

[John] Bridge, Bridge SO.
We're ready to launch here.

We're roly-poly,
but we'll give it a shot.

Okay. Let's do this.
Out on the A-frame.

Follow the tagline slowly.

The waves are coming in
behind us.

LF, be advised, it's gonna get
a little sloppy here

for a minute.

This is where we start
to rock 'n' roll.

Here we go, boys.

You're gonna have to go quick.
This is the worst part.

[man] Back on the main!
Back on the main!

[man] We're out of time.

[man] Up on the towline
a little bit!

[bleeping]

[bleep] me.

Just hang on. Hang on, buddy.

Get that out on the tow line!
Whoa, whoa, whoa!

[bleeping]

[man] Why are we doing this?

[bleep]

[man] Out on the tow line.

[Patrick] To have that happen
right at the moment

you're releasing it.

You know,
that's a sickening feeling.

[Victor] Status, please?

[man] Just be advised, uh,

looks like you may have lost
your starboard camera.

[Victor] Roger that.
Permission to dive.

[man] Negative, negative.

We gotta release
the towline still.

- Okay, let's pick up the...
- Yep.

[bleep]

[bleep]

[Victor] What happened
to the towline?

We broke the towline.

[man] We'll get her, Ricky.

[Demetri] Without its tow line,

the sub is now adrift.

The team must clear
the remaining lines

and avoid getting freezing water

inside their
protective clothing.

[Glenn] In the cold water
of the Southern Ocean,

if you go into the water,
you've only got about a minute

before you're in serious
trouble.

Let's get ready in case
he falls in the water.

What am I supposed to do?

[bleep]

[Demetri] After rough seas

caused the sub to collide

with the back of the ship
on launch,

the sub has lost one of its
external cameras.

The team can't see
any other damage

and decide to press ahead
with the dive.

- [man] LF, this is SO.
- [Victor] LF, go ahead.

[man]
Okay, you're clear to dive.

Clear to dive.

Pumping in. Okay, here we go.

We're descending.
We're underwater.

- It's eerily quiet.
- Yeah.

[Demetri] The green color
of the water here

is evidence of what makes
the Southern Ocean

so vital to life
around the world.

Plentiful nutrients
build up here

during the long, dark winters,

and in the summer feed

explosions of microscopic plants

called phytoplankton.

They bloom in such quantities

that NASA has even been able
to track them from space.

[Paula] It was mind-blowing
that on that type of scale

in the Southern Ocean,
the phytoplankton were

responding
to the surface currents

and the winds,
and their distribution,

and you could see
that from space.

[Demetri] Plants depend on light

and so they live
in a narrow band

near the surface,

the Sunlight Zone.

And here, they in turn
support an abundance

of microorganisms called krill

which feed a rich food chain,
from penguins...

to killer whales.

Passing below 650 feet,

the sub enters
the Twilight Zone.

Here, the light dwindles

and the ocean's
microscopic plants

can no longer survive.

Yet life does thrive here.

Like this ice fish.
Its blood still runs

because it has a natural
antifreeze in its veins.

And transparent, jelly-like
organisms called salps

that string together
in long chains.

[Victor]
See, look how dark it is.

[Alan] That's incredible,
isn't it?

Surface, this is LF.
Present depth, 348 meters.

[Demetri] Victor and Alan
have been underwater

for just ten minutes,

but the surface crew
have spotted evidence

of a worrying fault
with the sub.

[Alan] I think it's best
to report, just in case.

- Kelvin, Xeno.
- [Kelvin] Go ahead.

[Alan] Yeah,
just for you information

Looks like I can see
a small oil slick.

[Demetri] It seems that
when one of the sub's cameras

was damaged on launch,

it breached the oil-filled pipes

that carry electrical wires
around the sub.

It's now only a matter of time

before seawater gets in

and shorts out a vital part
of the electrical system.

The sub's power comes
from six batteries

packed into detachable pods
on either side of the sphere.

They, in turn,
link to junction boxes

that supply
the sub's components.

To protect the wires
and electronics

from the pressures of the deep,

the boxes and pipes
are all filled with oil.

Because oil is lighter
than water,

it's now escaping
from the breach

at the top of the sub,

letting water seep in.

If it reaches the junction box,

it will knock out
multiple components,

leaving Victor without
full control of the sub

2,000 feet below the surface.

[Patrick] Okay, response.
Need you to instruct

the LF to abort the dive.

They're gonna have
to abort the dive.

There are times
when you have to call it,

and even if it's unpopular,
you do it because

you have to do what's safe.

[Response] LF, LF,
this is the response.

Please abort the dive.

Abort the dive.

Roger that. Aborting dive.

- Repeat. Aborting dive.
- Why?

[Victor]
When we lost the camera,

it sheared the cable

- so oil started leaking.
- Oh.

[Demetri] Victor must now
make a controlled release

of enough diving weights
to bring the sub safely

back to the surface.

[Victor] Ejecting weights.

All weights jettisoned.
Ascending to surface.

Get ready to brace.

[Patrick]
We had to abort you, man.

Cause you would have...
you would have lost your...

and you would have lost
your modem anyway.

So, at some point,
you'd have been coming up

even if you didn't want to.

[Demetri] Repairs
to the damaged sub begin.

Try to give it a little bit.

[Demetri] And the team encounter

another deadly hazard

of the Southern Ocean.

Icebergs.

A specialist ice pilot
has joined forces

with the captain to navigate

through these unpredictable
ship sinkers.

[Berndt]
Nine tenths of an iceberg

is underneath the ice.

And I've seen icebergs
going against the wind

which is completely
not intuitive.

[Demetri]
To begin with, the icebergs

are relatively small.

But then comes a monster.

[Stuart] That's the target.
It's dead ahead of us now.

[Victor] Is this the biggest
you've ever...

I've never seen one this big.

It's extraordinary.
It goes off into the horizon.

[Heather] And it disappears
off into the fog.

And then disappears off into
the fog on the other side.

[Victor] This is massive!
How long is it, Stu?

About 18 miles,
this one, I think.

It's more than a half
marathon long.

You know icebergs
actually pose a true danger,

so when I'm coming up
from the bottom

I don't want to be going up
too fast because I don't know

what's directly on top of me.

[Demetri] Finally,
the team arrive

above the South Sandwich Trench,

a vast underwater canyon

that's a staggering
4.5 miles deep.

Their first task
is to identify on the floor

of the trench
the precise location

of the deepest point
in the Southern Ocean.

Using one of the most powerful

sonar scanning systems
in the world,

they begin to map, for the
very first time in history,

an extraordinary
hidden landscape.

[Victor] If this were inverted
and was a mountain range,

it would actually be higher

than the entire
Andes mountain chain.

It's massive.

[Demetri]
The South Sandwich Trench

is a staggering 600 miles long,

stretching from the lower
reaches of the Atlantic

down into
the Southern Ocean itself.

But up on the bridge,

the team spot a growing threat

to the deep dive.

[Victor] These storms are
moving faster than expected.

The two low-pressure systems
are causing

all this weather
to go in a funnel.

We can't outrun it.
We point the ship

into the storm
and we ride it out.

[Demetri] In the freezing
waters of the Southern Ocean,

an approaching storm
is threatening to derail

Victor's attempt to discover
and dive its deepest point.

We are in the screaming 60s.

You do not hang out
at this latitude

and not have storms come at you.

Even if it's rough weather,
we're gonna tough it out,

so we can get the bio samples,

even if we don't dive it.

I would like
to deploy the landers.

[Demetri] The landers are
underwater scientific probes

packed with sensors,
cameras and traps.

They are vital for the team's
mission to explore what life

could possibly exist
in the icy waters

24,000 feet below.

[Paul] Pretty exciting.
I mean, we are

at the limits of this planet.

Basically, ultra-cold
and high pressure

is very hard to adapt to.

[Demetri] There are five
landers on board,

costing up to $200,000 each.

But with the storm on its
way, to launch and retrieve

these near one-ton monsters
could put lives on the line.

[Alan] Hope it doesn't
storm more. We don't want

ice forming on the deck.

If any one of us fell
in the water,

I mean because
it's so cold down here,

you get hypothermia pretty fast.

[Heather] Watch out.

[Alan D] Come down the wire.

[Alan J] It's going that way.

Okay, tags off.

[Heather] Lovely job.

[Demetri]
Despite the conditions,

two science probes
are heading for the seabed.

Eight hours later,
and after a remote release,

they are due back
on the surface.

But now the weather is taking
a dramatic turn

for the worse.

[Alan] The nature of what we
do is notoriously dangerous

in terms of equipment-wise
and weather-wise.

You psychologically
prepare yourself

because with all best intentions

you can plan an expedition
for two years

and you go there
and it just goes wrong.

[man] Where are they?

[Stuart] I've got it. Okay Xeno,

we have a visual
about 800 meters west of us.

[man] Roger that.

[Victor] Oh, man.

[Alan] Just watch that arm,
it's just...

if it takes one little roll...

[Victor] It's scary.

[Alan D] Line come down, right.

[man] Going up!

[Alan D] Down, down, down,
Down on the wire.

[man yelling]

[Paul] Where is it?

It hasn't worked, no.

[man] We have lost it.

See what happened to the rope?

Looks like something chewed it,

[Demetri] A crucial piece
of scientific equipment

and any extreme lifeforms
it may have captured

are now plummeting back
to the seabed,

never to be seen again.

And now comes more bad news.

The crew have failed
to locate the second probe.

[Alan] We should be seeing
that strobe

clear as day by now, right?

[Demetri] And because
the Antarctic winter

is now fast approaching,

they must abandon
the search and move on.

[Paul] Very distressing,
yeah we have limited time

and we've got bad weather coming

and we might not get
another chance

[Demetri] There is better news
for the sonar team

mapping the trench.

Wow. what is that?

[Cassie] This is a sea mound
that's 1100 meters

off the sea floor.

[Demetri] The sea mound is an
extinct underwater volcano.

Previously unknown,
the team get to name it.

It's a stark reminder
that we know more

about the surface of the moon

than the seabed
of our own planet.

It's just fantastic.
I mean, nobody knew

anything about this area.

And look at all
the amazing features

that have been imaged
by the sonar.

[Demetri] The new data
also bolsters the theory

that the South Sandwich
Trench is the root

of the mysterious
lifeblood current

which feeds the world.

[Oscar] When you carve
trenches in the ocean,

you create a funnel
where water flows.

Are these trenches reservoirs
relatively undisturbed?

Or are they dynamic
through-flows of water?

[Demetri] To confirm the theory,

the team need to sample
the deep trench itself.

And now, for the first time
in history,

they've accurately pinpointed
the very deepest site

in the Southern Ocean.

[Cassie]
Based on the satellite data,

this one right here
has always been the one

that we thought
was going to be the deepest,

or this last one.

No one considered a third one.

Now we know the deepest point
in the Southern Ocean

is this yellow dot right here.

[Victor] Wow.

[Demetri] A staggering 24,388
feet below the surface.

This is Victor's target
for a dive

he's determined to take
on alone.

[Victor] Doing things solo,

you're completely responsible
for everything that happens.

And you're doing it by yourself

with such intense focus.

It makes it more interesting.
I guess for me.

It's more exciting.
You're completely on your own.

[Demetri]
There are now just days left

before the Antarctic summer ends

and the Southern Ocean
becomes too dangerous

to dive.

With rough seas forecast
for tomorrow,

it's now or never.

But there are major concerns
for Victor's safety.

I don't wanna slam into
the bottom of an iceberg.

There are huge bricks
of ice out there.

Apartment-sized blocks of ice.

[Demetri] The expedition team
are facing a major setback

in their plans
to send Victor down

to the deepest point
of the Southern Ocean.

Icebergs that could threaten
his return to the surface.

Despite the risks,
they decide to press ahead.

He's gonna make a very careful
and deliberate

return to the surface.

We want to make sure
that he verifies himself

with cameras
that the surface is clear.

Just in case we have him
misplaced on our chart.

Frankly, I'm gonna use
light power to slowly go up.

I'm not gonna drop
the freeboard to rocket up.

[Demetri] The team prepare
to launch Victor

on his historic attempt

into the freezing temperatures

of the deep trench
beyond any hope of rescue.

Okay. You're going
to have a great dive.

I know. It'll be awesome.

[Glenn] Going to the bottom
of the ocean in a submersible

is like going on a space mission

in terms of the isolation.

- [Kelvin] Coming down!
- Hatch coming down. Thank you.

Okay, let's do this.

Get him in, boys.

[Glenn]
The cold, extreme remoteness

will play on Victor's mind

because if anything goes wrong,

you're right at the end

of the most stretched
rubber band in history.

And you're really hoping
that we'll pull you back.

[Victor] LF, It's pumping in.

Proceeding to dive.

[indistinct radio chatter]

Roger that, I'll try
thrusters down. Thanks.

And down we go!

Looking outside the portal,

looks like a lot of food
down here.

Oh, I just saw a jellyfish.

Surface, LF. Present depth.

[man] Present depth, 487.

- Light support good.
- Roger that, LF.

We have you loud and clear.
Well, that was quick.

Whoo! [laughs]

I mean he is whistling down!

[Demetri] Within just minutes,

Victor reaches
the very deepest zones

of the Southern Ocean.

The Midnight Zone.

Where no light at all
can penetrate.

And where extraordinary
creatures

are still being discovered.

The giant sea spider
whose internal organs

are carried inside its legs.

The feather star,
which uses the long spines

along its arms to filter out
microscopic food

from the water.

And visitors from above.
Deep-diving sperm whales

which have the largest brains
of any creature

that's ever lived on Earth.

At 13,000 feet,

Victor enters the Abyssal Zone.

Home to sea pigs that inflate
up to seven pairs of legs

to walk around the sea floor.

And alarm jellyfish
that if attacked

emit bioluminescent flashes

thought to act like
a burglar alarm

to attract bigger predators
to the scene.

Can already feel the cold
coming through the bottom

of the submersible.

[Demetri] The temperature
of the saltwater outside

has now dipped below freezing.

I'm checking to see if I hear
something unusual.

I don't have any systems on.
I'm not using thrusters.

It's almost like a hum.

It does sound like a low hum

coming from outside the sub.

I don't think
I've heard that before.

There's so much background
noise right now.

Seems to be coming
from the submarine,

you can't hear the surface.

Surface, LF.

Present depth,
five-zero-three-one.

I cannot read you.

- I cannot read you.
- LF,

comms check. Comms check.

He didn't hear me.
He didn't acknowledge.

[bleep] what's going on
with that thing?

Do you read me?
Do you read me at all?

[Kelvin] As a submarine pilot,
you don't want to lose

communication with the surface.

That's extremely dangerous.
Extremely dangerous.

Status! Status!

What the [bleep] going on
where he can't hear us?

[Victor] Surface, surface.

How do you read?

Loud and clear. Loud and clear.

Crystal clear audio.
I can hear him.

[Demetri] It's a critical
moment in the dive.

Should Victor abandon
or continue into the deep?

[sighs] Maybe it's the cold
water or something.

3,000 meters from the...
from the bottom.

I may just keep going.

I've come all this way.

We're gonna achieve
the mission here.

I'm not gonna abort
for comms out.

[Demetri] As he descends
further into the trench,

it's not just
the communications system

under attack from the freezing

Antarctic waters.

The electrical supply
to the external cameras

has also cut out.

Well, now I'm really alone.

I don't have comms
to the surface,

I'm in a submersible by myself,

going down to the bottom
of the Southern Ocean.

[rapid beeping]

[Demetri] In Mission Control,
it's been two hours

since they last made contact
with the sub.

Attention all stations.

Be advised
that we can hear Victor

but we cannot communicate
with him.

He cannot hear us.

He's very close to the lander.

[man] I'd say within
a couple of hundred meters,

so he must be near the bottom.

Insulation fault.
That's probably

just some water residue
in there.

Everything's looking good.

I should be getting
really close now.

Oh, my.

I can see something
on the bottom.

I'm seeing the bottom
much more clearly.

I've just reached the bottom
of the Southern Ocean.

Looks like a moonscape
out of one of my portholes.

Surface, LF. At bottom.
Repeat. At bottom.

- On the bottom.
- [cheering]

[clapping]

I am at bottom.

I'm at the bottom
of the Southern Ocean.

[Demetri] Victor is
an amazing 24,388 feet

below the surface.

Where no human
has ever been before.

The team have also deployed here

their three remaining
science probes,

or landers, baited
with tempting fish carcasses.

And although Victor's
external sub cameras

may have cut out,

amazingly, the cameras

on the landers
are still working.

They now capture Victor's
arrival at the bottom.

His lights just visible
across the sea floor.

These are the first ever
images captured

at the bottom of
the South Sandwich Trench.

And attracted by
the lander's bait,

there's already a crowd
of super-strange specialists

able to endure intense cold
and enormous pressure.

[Victor] See tiny white...
they're like perfectly white.

They look like tadpoles.

What's that over there?
A larger creature.

A little pink on the...
on the top.

It has a little pink head.
Two big eyes.

Oh, he's definitely swimming.

He's swimming away
from my blast.

[Demetri] It seems that Victor
has identified a mysid,

a type of crustacean
whose bright red color

in fact makes it
even more invisible

in the pitch dark
of the deep ocean.

1500 feet further up
the trench slope,

a second lander is capturing
remarkable images

of the range of life
that thrives here.

Sea lilies, and tall,
tubular glass sponges.

Both snag passing microorganisms

drifting past in the current.

And higher up the slope still,

a third lander is capturing
the first ever footage

in this trench of a truly
remarkable creature.

Known as a snail fish,

this is the deepest-living
kind of fish yet discovered.

And here are two new species

filmed for the very first time.

The snail fish are not here
for the bait itself,

but to pick off any scavengers

the bait attracts.

Finally, the landers'

auto-release mechanisms
activate,

and they head
back to the surface.

But now comes
the massive challenge

of safely retrieving

these 200,000-dollar
pieces of equipment

in heavy seas.

- What do we got?
- [woman] I think I'll just

be happy if it lands on deck.

Oh, [bleep].

The most difficult side
to catch it on,

because of the arm.

[Demetri] Having lost
two landers already,

the pressure is on.

[man] Charlie, we're gonna
have to cross the tag lines.

[woman] Yeah.

Oh. Don't lose your balance.

[man] Oh, this thing is
a nightmare.

Whoa. Got it. Got it.
Wait, wait, wait.

- [man] All right, got it.
- [woman] Good.

Right, what does the bait
look like?

Oh, here we go.

[Alan] It's absolutely freezing.

[Demetri] The team have
a vital hoard of specimens

from 24,000 feet down

whose chemical secrets
could set the stage

for scientific breakthroughs
in the future.

[Paul] Hopefully,
we'll discover new molecules

that have to do
with combination of pressure

and ultra-cold temperatures.

Those may have all
kinds of applications.

In China, they've been able
to use the osmolyte

that we discovered
in deep-sea animals

to actually cure glaucoma,

which is a high-pressure
disease of the human eye.

[Demetri] Sensors on the landers

have also brought back
vital information

that could confirm the root
of the lifeblood current

carrying nutrients
from the Southern Ocean

to the rest of the world.

The data is dispatched to
the British Antarctic Survey

in the UK, where a team
have been tracking

the current at shallower depths.

[Hugh] The data
we were very kindly given

confirm that this is
Antarctic bottom water

and that it is going through
this trench.

The actual flow through it
is tens of times the flow

of the Amazon.
Millions of tons a second.

[Demetri] It's a breakthrough
that will be vital

for future scientific work.

[Hugh] We can measure
the waters flowing through

to see any change,
see any signals

that are happening
before it spreads out

across the whole
of the world's ocean floor.

These very deep data

are gonna be very valuable
for a long time.

Okay. I think that's a wrap.

Surfacing light release.

And we're heading up.

[Demetri] Two and a half hours
after leaving the bottom,

Victor is now approaching
the surface.

But after his radio and cameras

cut out in the cold,

he has no way of knowing

if there's an iceberg
in his path.

If there is,
the sub could be pinned

beneath the ice with no way out.

I'm just gonna come up slow.

Hope I don't hit an iceberg.

If I hear a thump,
I'm stopping quick.

Going up.
Just be patient, Victor.

100 meters to go.

[man] LF, comms check.
How do you read?

[man] Yeah. Do you have visual?

Hang on.

[Victor] On surface. Repeat.
On surface.

- [man] Yeah, we can see you.
- I see him now, I see a light.

[man] Welcome back, Victor.

Thank you, gentlemen.
It's good to be back.

[man] Xeno is inbound,

should be there in any minute.

[Victor] Roger that.
Xeno inbound.

[man] We had some comm issues,

but we're gonna talk
about that after.

Just glad to have you back
on the surface

and just rigging for recovery.

Roger that.
Comms were a problem,

but the mission was a success.

[man] Indeed it was.
Indeed it was, sir.

- Great job.
- [Victor] Thank you, sir.

[man] Just Nice and slow.
Nice and slow.

[Demetri] The sub may be
safely back on the surface,

but there's a final challenge
to overcome

in the volatile waters
of the Southern Ocean.

- [man] Ride that thing, Steve.
- [Steve] Okay.

Oh, that was a big wave, guys.

[Steve] The LF does not like
being on the surface.

It's designed to just dive.

Get to the bottom,
get there quickly.

And she's like a wild horse,

like you can try
to put a rope on it

and it just fights you, right?

Up on the main.

- Get it, Steve.
- [man] Get down on the main.

Come on, Steve.
Get... Go, go, go.

- Go!
- Come one, Steve.

[man] Two hands, man.

Up on the main. Up on the main.

That's good.
That's good, Patrick.

Good job, buddy.

Okay.

How you doing, Steve?
You wanna get off there?

I can jump in there and do this.

Steve, let's get you off.
No, he's too cold.

Hang in there, buddy.

Steve, let's get you off.

[Demetri] To prevent
the onset of hypothermia,

the expedition doctor must bring

Steve's body temperature
back up.

He's sat him down
next to the heating duct

in the sub's hangar.

Finally, Steve's warm enough
to be moved inside.

[indistinct chatter]

Yeah, they're the right color.

Keep using your hands.
Good work, man.

- Thank you.
- Good work.

[Steve] I've lived
on the Tropic of Capricorn

my whole life,

that's close to the Equator,

I don't do cold water.
[chuckles]

- [man speaks indistinctly]
- [man] Welcome back, Victor.

[Victor] Thank you.
Good to be back.

[cheering and whistling]

Good job, team!

[Demetri] At last, Victor is
safely back on board.

He's now the only person
to have reached

the deepest point
of the Southern Ocean.

The second of his five deeps.

- Good to be back.
- It's good to have you back.

[Victor]
Some interesting moments,

feeling quite alone

in the middle
of the Southern Ocean,

but we got it done,
it's good to be back.

All right. It's kinda cold.

[laughs]

Ha-ha!
Thanks for getting me back.

It's a very high-tech machine
that we took

to a very inhospitable place.

And it was extraordinary.

We're doing it
because we're explorers.

Because we want to see.

We want to push the boundaries.

We want to learn things

that haven't been
learned before.

And we want to do it together
and bring it back

and share it with other people.

[mellow music playing]