All language subtitles for Expedition Deep Ocean Series 1 4of5 Pacific Ocean 1080p

[suspenseful music playing]

[Patrick] This is
the mother of them all,

I mean, it is the deepest
of them all.

So, we've got a lot on the line.

We're going to be assaulting
the challenger deep

with more technology
and more capability

than anyone has ever done
in history.

You realize how deep
we are, right?

[Alan] Oh, my word,
look at that!

It's going up!

[Victor]
Oh! This is really hard.

[Alan] Whoa! Up, up, up up!

What the hell was that?

[machine beeping]

Got a big battery fault.

Surface, LF has lost power.

[suspenseful music playing]

[Demetri] Humankind has explored

every continent on Earth.

We've 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.

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...

[Patrick]
What the hell was that?

We have leak in hatch

[Patrick] Oh, my God.

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

as never before.

[Cassie] Trying to like
mentally put yourself

at the bottom
is just mind blowing.

[Demetri]
Mapping hidden landscapes

discovering
unknown life forms...

[Alan] What on Earth was that?

[Victor]
There is something there.

[Demetri] ...and unlocking
the secrets

of how life
in the extreme deep ocean

affects our entire planet.

[dramatic music playing]

[suspenseful music playing]

[Demetri] Ex Naval Commander
Victor Vesco,

is now getting ready to face

the ultimate challenge
of this expedition,

the deepest dive on our planet.

[Kelvin] Roger that.
You are free to dive.

[Demetri] So far
he's travelled 20,000 miles

half way across the world

and completed three
record-breaking dives.

[Victor] And I just wanted
to say thank you all

for getting us to this point.

It's been four years
since we first started

thinking about this
overall mission.

[Demetri] But now,

he will be pushed to the limit

by the largest and deepest
of the Earth's oceans.

The Pacific.

[Rob] I mean, this is

the mightiest ocean of them all,

this is a third
of the surface of our planet.

The Pacific Ocean is
different than all the others

in that it has the oldest
seafloor in the oceans.

It is just much deeper,
much older ocean.

[Demetri] It is also home

to the deepest place on Earth,

the Mariana Trench.

[Victor] From a very young age

I loved just looking at atlases

and one of the most prominent
features in any Atlas

is the deepest point
in the world

which is the Mariana Trench.

This deep dark place,

of course it captured
my imagination.

[Demetri] It's 8,000 feet deeper

than any dive
Victor has attempted before,

and it will subject the sub
to enormous pressure.

[Patrick] Just come up
on the A-Frame.

Let me know when we're clear
for straps, Kelvin.

[Kelvin] Yeah,
we're clear for straps.

[Rob] It's as an extreme
environment

as we have on planet Earth.

This is the major league,

you know, this is as difficult,

as technically challenging

as submersible diving gets
on planet Earth.

[Demetri] The bottom
of the Mariana Trench

has only been only visited
by three people

and one of them is on board.

Okay, good. Thank you guys.

[Demetri] Captain Don Walsh.

In 1960 he and a fellow
deep-sea explorer

took an experimental craft

to the uncharted depths
of our planet.

[Don] I never had any fear.

Why have fear?

What are you gonna do about it?

You're committed.

You're gonna go down there
as far as you can,

if something doesn't work,
too bad.

And there's nothing
you can do about it.

[Demetri] Fifty-two years
later in 2012,

Don witnessed a solo dive
by Hollywood director

and deep-sea explorer,
James Cameron,

who recorded a depth

just 10 feet
shy of Don's record.

[phone ringing]

[James] Hey, Victor.

Hi, Jim, how are you?

[James] Hi, good, good.

[Victor] It's great sitting
next to the first person

to go down
to the Challenger Deep

and it's just so wonderful

to be able to talk
to the second person

and hopefully we can continue
passing the baton.

[James] Yeah that's great.

I mean, you've really
kicked the ball further

down field
in terms of the technology.

And the only other piece
of advice I would give

is give yourself a moment, stop,

and just look at the window

and just think
about where you are

and what it means.

That's great, Jim.

I appreciate that.

[Demetri] But now,

Victor is on a mission
to find a spot

even deeper than Don Walsh
and James Cameron,

and break a record
that has stood for 60 years.

[Cassie] We have
one of the best sonars

in the world right now

and we're going to produce

the most accurate map
of the Mariana Trench

that's ever been done before.

[Demetri] The deepest section
of the Mariana Trench

is in a hollow known
as the Challenger Deep.

But the team
also want to take on

a deep ocean exploratory dive,

a hundred and forty miles east

in the Sirena Deep,

where no submersible
has ever been before.

[Patty] So, the deepest part
is right in here.

Nobody's been down there.

[Demetri] The team will
be on the hunt

for vital new scientific data

that may help find alien life

elsewhere in our solar system.

Because there are frozen moons,

like Europa orbiting Jupiter,

that NASA believes
could hold life.

Beneath the surface ice,

deep oceans
might nurture organisms

able to exist in environments

as extreme
as the Mariana Trench.

[Patty] NASA's
search for life efforts

are looking
for the limits of life.

They are very interested

in looking at the deep trenches

to see if microbes can live

in these most extreme
environments on the planet.

[Demetri] If they can find
colonies of bacteria

in the Mariana Trench,

then extreme forms of life
could also exist

in the oceans
of those alien moons.

The general conception
I have for this dive

is that this is very much
a science focused dive.

One thing
that I am concerned about

and that's recovering
the samples.

First priority is a rock
with some stuff on it.

Fingers crossed.

Just be vigilant

as you're approaching
the bottom.

That, that depth sounder,

once it starts picking up

and as you know
Victor giving you

- reliable data...
- Mmm-hmm.

...you gotta pay attention
to it,

you can't ignore it.

I mean, I don't know
if there's pinnacles

or haystacks.

Who knows what we'll find.

[Kelvin] We're gonna leave
that one down.

[Demetri] Even though
the dive is not the deepest

in the Mariana Trench,

at 35,000 feet

it will put
the sub's engineering

under massive strain.

[Patrick]
It's a substantial pressure,

so we've got a lot on the line.

We basically got
all the poker chips

in the center of the table.

[Demetri] Chief scientist,
Alan Jamieson

is joining Victor
on this pioneering dive.

- Welcome back, sir.
- Hello.

[Kelvin] LF, LF, SO.

[man] LF, LF.

[Kelvin] Hey, we're gonna go
for release here.

We'll let the sub off the hook.

- Do it.
- Perfect.

[Stuart] And we're currently

about 900 meters
from the drop zone.

[Kelvin] Okay. Roger that.

[Patrick] We can tow him
for a couple of minutes,

no worries.

[Stuart] Twelve,
before a few minutes

until we're ready to let him go.

[Demetri] To dive
Victor will pump water

into empty ballast tanks
at the top of the sub.

But now the waves are picking up

and flooding them early.

[Rob] Seventy-five to go.

[John] They're spending a lot
of time under the water.

The tanks are gonna be
filling all the time.

[Patrick] Son of a [bleep].

[Frank] With that
much weight on the sub.

That [beep] goes down quick.

[Rob] Fifty meters to go.

[Patrick] That's gotta be it.

We can disconnect now.

[Rob] Release, release!

[Patrick] It's tied off.

Get that [bleep] tow line.

[man] Grab on that tow line.

[Patrick] Get her loose.

[Rob] Release.

[Patrick]
When those tanks filled up,

- she's diving.
- [Rob] Release.

[Demetri] Swimmer Tim's
got just seconds

to release the towline

and must avoid getting entangled

and dragged to his death.

[Rob] Release, release, release!

[suspenseful music playing]

[Patrick] Those tanks filled up.

She's diving.

[Rob] Release, release, release!

[Patrick] Come on, Tim,
get her loose.

[suspenseful music playing]

[Tim] As I am taking
handrails off,

I could feel the sub going out

from underneath me.

In a bit of a panic,

I tried to get out of there
as quick as possible

to make sure I wasn't
tangled up in anything.

[Demetri] On their way down,

Victor and Alan pass through

the top layer of the ocean,

called the Sunlight Zone.

Home in the Pacific

to one of the nature's
greatest survivors,

the nautilus.

It's remained
virtually unchanged

for half a billion years.

As the sub goes deeper,
the light dwindles,

and they enter
the Twilight Zone.

Here, out of the darkness
emerges

one of the wonders
of the deep ocean,

creatures that generate
their own light.

[Alan] Wow,
look at the bioluminescence,

can you see it?

- Yeah? That was great...
- [Victor] Oh, that's so cool!

- [Alan] ...isn't it?
- [Victor] Yeah.

[Alan] Bioluminescence
is the most commonly used

communication on planet Earth.

In terms of the number
of species that use it.

[Demetri] In the Pacific

the Twilight Zone holds

other extraordinary creatures

adapted to live in the gloom.

Like the Cock-eyed Squid.

Its larger left eye can pick out

camouflaged prey
in the waters above.

While its smaller right eye
points downwards

to spy any predators
lurking below.

The sub is now passing 3,000ft.

Beyond here a US nuclear sub

would be crushed like a tin can.

This is the Midnight Zone,

where some of the most
bizarre animals

on the planet
are still being discovered.

This is a Gulper Eel,

which can detach its jaw

and inflate its body
to swallow much larger prey.

[Victor] Somewhere between
3,000 and 6,000 years

just as the pressure decreases

the size of the sphere,
it tightens

and it happens suddenly.

It makes a little wrapping noise

on the capsule,

it's a little unnerving.

We've been in
the submersible now for...

three hours and nine minutes.

[Demetri] The sub is now

in the deepest ocean
region of all,

the Hadal Zone.

And finally
their goal is in sight.

[Victor] I can see it,

see it slowly getting lighter?

Eleven meters of the bottom,

we should see it very shortly.

Four meters off.

It's one meter off the bottom.

That's the bottom
of the Sirena Deep.

Incredible.

[Victor] Surface, LF.

Surface, life support good
at bottom.

Repeat, at bottom.

By the way, congratulations.

First man
to descend the Sirena Deep.

As are you.

[Demetri] The sub is now

under some of the most
extreme pressures on Earth.

Victor and Alan
are the first humans

to see this unexplored
landscape.

Now they need to look
for communities of bacteria,

the kind of extreme life

that NASA might find
beyond our planet.

[Lynne] Finding a microbe

in the bottom
of the Mariana trench

is important to me

because deep
at the bottom of the ocean

you don't have access
to sunlight

and so these organisms
have to use

some other source of energy
other than sunlight.

[Demetri]
Some bacteria have developed

to feed on chemicals seeping
from the Earth's crust,

but none have been found
in these extreme depths.

[Victor] What should
I be looking for?

[Alan] You're looking
for bacterial mats

of very distinct color.

[Victor] What do they look like?

[Alan] Some of them are white.

Some of them are really
strikingly orange and yellow.

Okay. Your eyes are outside,

- I'm on the inside.
- [Alan] Yeah.

[Victor] Been down here
two hours, fifteen minutes.

- Already.
- Yeah.

[Alan] How long do we have?

Yeah, we're below 50%
on the batteries.

Oh, [bleep].

All right. stop, stop, stop.

What is that.

Woah, up, up, up, up up, up.

What on Earth is that?

[Victor]
Is that a bacterial mat?

Look at that. Look, look.

[Alan] Yep that's it!

See the yellow?

[Demetri] The yellow growth
on the rocks

is in fact millions of bacteria

feeding on chemicals

seeping from the Earth's crust.

And it's the deepest
ever observed.

High five.

[Alan] I knew
patience would reward us.

[Demetri] The team
have visual evidence

of the kind of extreme life

that could exist in deep oceans

elsewhere in our solar system.

Now they need to bring back
a first-ever

physical sample.

[Victor] The current
is pushing us to the right,

it's heading it's...
Woah! [bleep]

[Demetri]
But now a strong current

is making this delicate task
near impossible.

[Victor] Flying a submarine
in a current with one hand

and trying to get a rock
with a manipulator.

This is really hard.

Oh, my God,
my heart is going faster!

Wow!

Let's give it one more try.

I got a [bleep] rock!

I got a rock!

I can't believe I got a rock!

It fell apart... Damn it.

[machine beeping]

- [Alan] What was that?
- [Victor] The batteries.

We have been here three hours.

Okay. That's it, I tried.

All right.
I'll drop the weights.

Surfacing weight,
we're on our way.

I'm sorry, I didn't
get a rock for you, doctor.

I tried, I tried like hell.

Surface, Surface, LF,
how do you read?

[man] We got you, buddy,
we are on the hunt.

[Demetri] The team failed
to obtain a rock sample,

but as the sub
comes back on board,

the crew make
a surprising discovery.

[Shane] Holy [bleep].

[Patrick] Nice and easy,
nice and easy.

[Demetri]
After the first ever dive

to the Sirena Deep,

the team find an unexpected
piece of evidence

inside one of the battery
compartments.

[Patty] This is so cool

that you guys
found this rock in here.

Can you show me where?

[Shane] Basically just down
in the bracket there.

It was sitting on the flat spot.

- Ah yep, that makes sense.
- Yeah.

- Okay.
- Yeah.

The mud got us thinking,
let's keep an eye out.

[Patty] This is great.

What a find.

This is the first rock

that has been recovered
in the Sirena Deep.

[Demetri] Microscopic
analysis of the rock surface

shows intricate
bacterial growth.

[Lynne] For us
as astrobiologists,

to know that there is life
deep in the ocean,

gives us confidence
when we start to look

at other places
in our solar system,

that there are organisms
that can survive

on another planet
without sunlight,

and live
under very high pressures.

At least we know it's possible

and it's worth going looking.

Wait. Hold on a minute.
I'm gonna grab that line.

[Demetri] But now the team
discover a problem

that could jeopardize
any further dives

into the Mariana Trench.

One of the three
navigational probes,

called 'landers', is missing.

Alan said that the one
of them is still not

on its way up.

That means it must be stuck.

[Patrick] [bleep] me, man.

[bleep] lander
stuck in the mud down there.

Bad news, man.

You know what you've got
to do, don't you?

- [Victor] Go down and get it?
- [Alan] Yeah.

[Demetri] To save the mission
they must risk

an unprecedented
deep-sea rescue.

[Rob] If we are able
to actually rendezvous

with a dead target.

We are attempting
the deepest salvage operation

that's ever been attempted
by man.

So, no pressure.

The big challenge
is to find the lander

that has now ran out of battery

so it's not able
to signal to us where it is.

Once we find it,
uh, with the sub

the sub will need
to either work it loose

by using the manipulator
to free it.

If it needs to remove
the weight from the bottom

it will need to put the
manipulator arm in underneath

and cut the wire
that's attaching the weight

to the lander itself.

[Demetri] At the helm
of this risky operation,

Victor puts one of the most
experienced sub pilots

in the world, the builder
of the sub itself,

- Patrick Lahey.
- [Patrick] If we find it

we are going to try
and get it off the bottom.

You know, whatever it takes
we'll release it.

[Demetri] But grappling
with the lost lander

holds a terrifying danger

of the sub itself getting
trapped irretrievably

on the seabed.

[Patrick] The thing you worry
about is entanglement.

You have to be vigilant
as a pilot, you have

to be to paying attention
of your surroundings.

- All right, McGee...
- [Kelvin] Get it done buddy,

- get it done, get it done.
- Thank you. All right.

[Patrick] Bring us home
safe buddy, thank you!

- Thank you, Frank.
- [Jonathan] Okay.

I'm getting ready.

See you later.

[Demetri] Accompanying Patrick

is deep ocean
submarine specialist,

Jonathan Struwe.

[Victor] It's really dark
and deep

and difficult down there
to navigate.

I just hope they find it.

What an accomplishment
that would be.

- Let's have a good dive.
- Let's have a good dive.

[Victor] They're a long way
from home down there.

And you feel it, I tell ya.

Let's launch the sonar.

I am going to go ahead,
I'm going to increase

the scanning speed.

[Demetri] Once on the bottom,
they start the search

for the lost lander,
codenamed "Skaff".

Oh, yeah. That's something.

So, we are two meters off
the bottom.

We'll get you Skaff, careful.

[Demetri] They use
the sub's sonar

to ping the surrounding
landscape

in the hope of a return echo.

Here you go,

now it should be in your window.

Just a second and it'll be
in your window.

There. You can see him.

[Patrick] Oh yeah, here we go.

[Jonathan] Skaff.

There we are.

[Patrick] Okay. We are on it.

[Jonathan] Yeah. No. It's...

-It's ahead of us
-[Patrick] Yeah,

- dead ahead of us.
- [Jonathan] It is dead ahead

of us.

Yeah, get right over there,

get the lights on it.

[Jonathan] There we are.

[Demetri] Having landed
at an awkward angle,

one corner of its base
is wedged in the sediment.

Jonathan must now work
the robotic arm

to release it.

This is the most dangerous
part of the operation.

Ah [bleep], what's going here?

Index again
and try to straighten out.

Try, try, try doing that.

[Jonathan]
I can't, for some reason.

Ah.

[Patrick] Okay allow me
just to come ahead

I'm going to push you.

Yeah. I am going to push
the lander.

[Demetri] If the arm gets
entangled with the lander,

and the emergency
arm-release fails,

they could be trapped
beyond any hope of rescue.

Back up just a little bit.

Let's get
into the right position.

[dramatic music playing]

What was that?

[Demetri] Patrick
and Jonathan are attempting

a daring rescue mission
seven miles under water.

[Patrick]
Get into the right position.

[Demetri] One wrong move
and the sub

could get snagged
on the trapped lander.

[Jonathan] He's going up!

We hit him.

He's on his way!

Aaah! [laughs]

Patrick! [laughs]

Woooh!

[Patrick] Surface, LF,

the lander has released

[cheering]

[Victor] This is the deepest

maritime salvage operation
ever attempted.

And to say that we actually had

a marine lander trapped
on the bottom

and then sent two men
submersible to the bottom,

found it and released,

it is simply a technological
tour deforce.

It's extraordinary. I am
so proud of the entire team.

[chuckles]

[Demetri] With all
three landers on board,

the crew is now getting ready

for the deepest dive
on the planet.

And the scanning team has made

a ground-breaking new discovery.

Their high-resolution data

reveals a location
on this planet

that's deeper
than any found before.

[Cassie] We estimate
to be 10,920.

Plus or minus 15 to 20 meters.

[Demetri] At nearly
36,000 feet deep,

it's a staggering 117 times

the height of the Statue
of Liberty.

If Victor is successful
in his mission,

he will become
the deepest-diving man

in history.

[Victor] We're going
to be assaulting

the challenger deep
with more technology

and more capability than anyone

has ever done in history.

We have the most advanced
sonar in the world

and we have a submarine
with a two-person

titanium sphere
that can do multiple dives.

No one had this before.

One, two, three.

[Demetri] This will be
the sub's ultimate test.

[Victor] The challenger deep
here in the Mariana trench

is the mount Everest
of deep ocean diving.

The pressure is 16,000 psi.

The viewports they compress

almost a quarter of an inch

under that intense pressure.

[Patrick] Ready for Victor.

500 meters from the site.

[Victor] It's three
and a half to four hours

- down and up.
- Have a great dive Victor.

[Victor] So it stresses every
part of the submersible.

Good luck to us all.

What's really worrying is that

something might not work.

[Demetri] If something
serious goes wrong,

Victor is on his own,
where no other craft

can possibly reach him.

[Tim] Sub's clear!

All comes down to this

after 4 years of planning,
building, testing, diving,

this is the big one.

[dramatic music playing]

[Kelvin] Fantastic,
have a good one Victor.

[Victor] Thank you. See you
all on the other side.

Let's get the oxygen
going here...

[Demetri] To keep Victor
alive deep under the water,

the sub is equipped
with enough oxygen

to last for 4 days,

but the carbon dioxide
Victor exhales

could be lethal.

So two high-tech devices
called "scrubbers",

packed with absorbent materials,

work relentlessly
to keep the carbon dioxide

below dangerous limits.

[Victor] Surface,
LF present depth, 833.

Heading 045.

- Life support good.
- [Patrick] Roger LF,

understand life support good,

we have you loud
and clear, Victor.

[Victor] You can hear the
outside of the sub creaking

just a little bit
as it just kind of settles in.

[Demetri] Every 60 seconds,
the pressure

on the sub increases
by 400 tons.

The equivalent of one jumbo jet

added on top of it every minute.

Victor is aiming for a lander,

located in the deepest part
of the trench.

He will then ping the other two

to determine his exact
position on the seabed.

My three companion robots
are probably

on the bottom now.

[beeping sound]

[Tom] All right. Patrick,
we've got an issue.

Lander on the way up.

[Demetri] The release mechanism

on one of the landers
has triggered early

and it is now hurtling up
under the sub.

Captain be advised,
we appear to have a situation.

The lander has left
the bottom unexpectedly.

At this time
just about 400 meters

below Victor and on its way up.

That's weird,
the lander is closer to 'em.

Wrong reading?

Something wrong with its modem?

LF, LF.

LF.

Roger, go ahead.

Be advised,

lander has left bottom.

Has left bottom.

[Victor] Oh [bleep]
there is a collision risk.

I mean, I'm going down
right on top of it.

Hope it doesn't hit me.

[Demetri] If there's
a collision,

it could rupture
mission-critical components

of the sub.

[Patrick] They are not even
200 meters apart now.

Hundred and fifty meters apart.

They are hundred meters apart.

- Within 50 meters.
- [Victor] [bleep]

[Demetri] On his way down to
the deepest place on earth,

Victor is in danger of crashing

into one of his own
robotic landers,

now heading up beneath the sub.

[static radio]

[Demetri] If Victor collides
with the lander,

it could be the end
of the mission.

I've always worried
about mid-air collisions

as a pilot, but I never
thought I could have

that deep in the Mariana Trench.

[Patrick] Within 50 meters.

I am certainly not gonna be
jamming thrusters down.

I don't want to run into him.

[Patrick] They're probably
very close to one another.

[dramatic music playing]

[Victor indistinct on radio]

[Patrick] It's above him.

[Victor] Yep, looks like
it has passed me.

Strange things happen
down at this depth.

Woah, seeing 10,000 meters
is pretty interesting.

That's a big number.

Can't help but to be
a little bit nervous.

[Demetri] The sub is now under

the greatest pressure
in our oceans.

Equivalent to having
the largest aircraft carrier

in the world sat on top of it.

[Victor] Altimeter is at 237.

Looking out the portal
just make sure

that I don't slam
in the bottom here.

[dramatic music playing]

Thirty-four meters to go.

Should start coming into view...

Come on. So close.

Eighteen meters.

[dramatic music playing]

I can see the bottom
on my display,

there's the brown of the bottom.

Touchdown.

[dramatic music playing]

There is the bottom
of the entire ocean.

Surface LF,

at bottom.

[cheers and applause]

Congratulations Victor,
congratulations.

[Victor] Congratulations
to you all.

[Demetri] Victor is now
35,843 feet

below the surface,
deeper than anyone else

before him.

Beginning exploration
of the bottom.

Outstanding. What a moment...

Wow, it's so soft.

In some respects this is
such an alien environment.

Eleven thousand meters down,

16000 PSI, no light.

This is almost like
an alien world.

Oh, wow, wow, what's that guy?

Whoa, whoa, we've got to go
back and check that out.

That looked like something
really interesting.

Who are you little guy?

What in the hell are you?

You're like a...
a jellyfish snake.

[Demetri] This sea cucumber
uses its transparent tube

feet to forage for food
in these crushing depths.

Definitely some life down here.

I saw it with my own eyes.

[Demetri] During
their operations

below 13,000 feet
in the Mariana Trench,

the science team
has gathered footage

of even stranger animals.

- Look at that.
- [Johanna] That is cool.

[Alan] This fish is a cusk eel.

What makes this one
really interesting

is that it has
a transparent head

made of a gel like substance.

It's almost certainly
a new species.

- Well, that's not a fish.
- [Joanna] I know.

What the hell is that?

This animal that is
drifting past the camera

is a colony or collection

of lots of little small animals.

It's kind of like a jellyfish

but there is lots of,
if you imagine thousands

of little jellyfish
holding it together,

and we call that a siphonophore.

[Johanna] Oh,
that's a really good shot.

[Alan] I would say
that's the best video

of a snailfish we've ever got.

The Mariana snailfish
is quite an iconic fish.

These fish are right
on the absolute limit

of what all fish
in the world can cope with.

If they were to go any deeper

than where we have seen them

their cells would start
to implode.

[Demetri] It is a rare glimpse

of the elusive creatures
of the deep,

but soon Victor makes
a more disturbing discovery.

[Victor] What the hell is that?

I saw something that looked like

a triangle and nature
doesn't do straight edges,

they don't do straight lines,

and I saw something
that looked like

a piece of refuse.

[Demetri] Close examination
reveals what appears

to be a letter "S",

evidence of the
unstoppable impact

of human pollution.

[Victor] It's unfortunate
that even there

at the very bottom of the ocean,

that there is, you know,
contamination of some kind.

[Demetri] Victor
has broken a record,

but extreme conditions
are taking their toll.

I've been here for 4 hours.

We're running out of power.

Challenger Deep.

Let's go home.

Surface weight release.

Here we go.

Like a moon launch.

[beeping sound]

What was that? That's a new one.

Well that ain't good.

It looks like we've got
a big battery fault, yeah.

I wonder if I hit something
on the bottom

that might have caused an issue.

Oh, that's great.

Now everything is black in here.

[dramatic music playing]

My heart rate is up
a little bit.

Surface, LF has lost power,

is on emergency
battery power only.

Do not have good communication.

[Patrick] Roger, understand,
we will track you

from the surface.

[Demetri] Still three hours
from the surface

and with no main battery supply,

the sub's systems
start shutting down.

First goes the heating

and the temperature
quickly drops

to near freezing.

Got my warm gloves.

[Demetri] But things
are about to get

far more serious...

[beeping sound]

CO2 alarm 0.5.

[Demetri] Normal
carbon dioxide levels

in the air are 0.04%.

In the sub they are now
rising rapidly.

[tense music playing]

[static radio]

CO2 is 0.72? Is it?

[Demetri] Every breath
Victor takes

releases more toxic
carbon dioxide

into a sealed environment.

If the levels keep rising,

Victor may not have long

before he loses consciousness.

[dramatic music playing]

[Steve] Still 40 minutes
from the surface,

carbon dioxide levels
inside the sub

are reaching alarming levels.

[beeping sound]

The CO2 is rising rapidly.

At 1% CO2 you start
to feel ill effects,

at 2% I believe you pass out.

[Demetri] If the levels
keep rising,

Victor might not reach
the surface in time.

0.5 is the alarm condition.

LF, what is your O2 reading?

Confirm, both scrubbers
are running?

You do have
a secondary analox unit

you can power that up.

[tense music playing]

[Patrick] LF,
what is your reading?

Control be advised
CO2 level 0.32.

Roger. Say again,
say again your last Victor.

[static radio]

Control be advised, CO2 level

back down to 0.32.

Roger that, okay man,

will see you on the surface.

[Demetri] 12 hours since
his early morning launch,

Victor returns from
the deepest place on earth.

[Rob] LF, this is Xeno,
welcome back, Victor.

[Tim] Swimmer in the water!

[Rob] LF, LF Xeno This is Xeno.

Yeah, Victor,
we are taking the odd wave

across the top of the sub,
if you could thrust up.

[Victor] Surface, be advised,

using thrusters overloaded

my remaining batteries,
batteries are dead.

[Demetri] With no power left,

the sub can't fully resurface.

Swimmer Tim once more
has to put his body

- on the line.
- [Tim] I got it, back away

[man speaking indistinctly]

[man] Okay.
Standby with the handrail.

[Patrick] Keep an eye
on that towline, boys.

[Tim] Towline has come loose!

Towline has come loose!

[Rob] Give him slack!
Give him slack!

Give him slack!

You okay Tim?

[tense music playing]

Tim? You look good?

You okay, Tim?

[tense music playing]

[Patrick] LF is on the hook.

That was [bleep] sporty boys.

[dramatic music playing]

[cheers and applause]

[Victor] Thank you, guys,
well done!

Thanks for coming to get me!

[Demetri] Despite
an electrical failure

and a carbon dioxide scare,

Victor has conquered the fourth

of the five oceans.

[Victor] Well done.

[Patrick] You did it buddy,
you did it!

- [Don] Congratulations.
- [Victor] Captain Walsh,

well done sir. Thank you
for showing the way.

- [Don] You're my hero.
- Thank you.

No, you're mine.

[Patrick] Victor Vescovo,

world's deepest diver!

Whoo!

[Victor] It was a...
It was an amazing dive.

I think almost exactly 12 hours

but I must confess
that there is more life

down there than I expected.

I thought it was
gonna be completely dead,

and it is not.

[dramatic music playing]

I'm just glad to have you...

- It's good to be back.
- ...back home safe.

It's great to have him back.

It was a great dive.

[Don] It's an inspired
clever design.

And even it's been 60 years
since we did ours,

this is like stepping
into the future.

[Victor] Looking at a map
you can take a look

at the Mariana Trench
and its very dark and blue,

even black. Its intimidating.

I have seen the sandy bottoms,

I've seen the rocky ledges,

and it's not a deep
dark scary place,

it's tough to get to

but there's an incredible
amount of things

to discover there
and we now have a tool

that can bring us there.

[dramatic music playing]