All language subtitles for Lost Gold of World War S02 E06_track3_[eng]

‐ Narrator: ..."Lost Gold
of World War II"...

‐ I'm not really sure
what I have here.

‐ This is actually
French marble.

‐ How in the world
did it ever get

in the bottom of a hole
in the Philippines?

‐ John: These guys just
showed up out of nowhere.

You know, it's a little
disconcerting.

Maybe they're thinking
we're getting close.

We know we punched
into this void space.

We want to send a camera
all the way down there

and see
what that anomaly is.

‐ Rick: What is that?

‐ John: Oh, my God.

That is definitely
a piece of wood.

‐ Rick: That's a timber.

Keep it coming.

‐ John Casey and Rick Hurt

are back in the Philippines

with a new team,

continuing their search
for Yamashita's gold.

‐ We're gonna find a way
to get to this treasure.

‐ Like many others,
John believes

Japanese general
Tomoyuki Yamashita

took billions of dollars
in treasure

looted by Japan
during World War II,

and buried it
in the Philippines,

including somewhere
in this mountain.

Following a series
of mysterious symbols

they believe were left
by Yamashita,

the team is investigating
three sites‐‐

a waterfall...

‐ John: This waterfall
is hiding something.

‐ ...a crater
known as Breach 6...

‐ I've never seen
anything like this.

‐ ...and a camouflaged tunnel
they uncovered last year.

‐ We are in the mountain,
boys!

‐ Can they finally
discover the...

In the Philippine mountains,

at the bore hole site...

‐ You seeing that?

‐ Yeah.
‐ Mm‐hmm.

‐ ...John and his brother Rob

are investigating
a mysterious void

the horizontal drill hit

on its way
towards the waterfall.

‐ Hold on. What is that?

It's a timber.
It's definitely a timber.

There's a nail
sticking out of it.

That's friggin' awesome.

Look at that right there.
That's definitely a nail.

‐ Absolutely.

‐ There's another nail.
There's another one

and a timber.

At first I thought this was
a natural void space.

‐ No.
That straight edge there,

that's definitely manmade.
There's no doubt about that.

That timber looks
like the ones

that Levi and George
are working on

in their tunnel up there.

I wonder if these two connect.

‐ Close to 200 feet
underground.

‐ You know, it could be
on a 45‐degree angle,

for all we know, going
right to the treasure.

‐ I'm gonna get this camera
out of here.

‐ All right, well,
let's get this tape

over to Rick and the boys.

‐ For John, the discovery
of a possible tunnel

suggests maybe
there's an easier way

to get under the waterfall.

‐ If it was just a void
in the rock

that naturally
Mother Nature made,

you wouldn't be seeing
pieces of wood in there.

You wouldn't be seeing things

that look like timbers
in there

and stuff that just
doesn't belong

in a natural void space,

so somehow
that stuff got in there.

‐ Later, at basecamp,

John gets the rest of the team
up to speed.

‐ This isn't just
a natural occurrence

where a void space
in the rock.

‐ Somebody put that there.
There's no doubt about it.

‐ Exactly. And I'm thinking,

if they put it there,
we can get to it.

We got to figure out a way
to get in there.

Now we're trying
to drill 900 feet

to the room that's underneath
the waterfall 300 feet down.

Seeing all that wood and nails

and seeing that it's
an actual tunnel,

does this tunnel go to the room
underneath the waterfall?

So maybe we won't have
to expend so much energy

going the rest of the way.

Maybe we can just
get to that tunnel

and then walk right in.

My gut feeling is
that this tunnel leads

right to the waterfall.

‐ I think you need to take
a better look

at these pictures.
‐ Mm‐hmm.

‐ Because you're opening
a can of worms.

You got a little void
right there,

and I can already tell you
of a giant collapse here.

I'm not trying to be
the bearer of bad news, man,

but the reality is

this is probably an air pocket

that you hit in that drift.

It's probably caved in
on both sides of it.

There's not even
anything here.

What are we gonna recover
from this

if we drive out there,
a piece of wood and a nail?

‐ No, I was just thinking,
once we get into that tunnel,

that we can just
kind of mark it out

and kind of go right
towards the waterfall.

‐ Well, we have a tunnel
that we're already in,

and it's in a lot better
shape than this.

You have a void,
and you have some wood

with a nail in it.

‐ You guys are overlooking
the big issue here.

You're talking 200 feet down.

You're talking
a 200‐foot shaft.

You're talking
a year and a half of work.

I mean, it's a major...
‐ Especially...

‐ ...undertaking.

‐ Especially with the resources
we have here.

It's not clamdigger and hoist.

It's a shovel and a dude.

We're running on what‐ifs.

All we have here
is timber and nails.

My opinion‐‐
I think you keep drilling

and see what you're gonna
hit out there.

We get out to 1,000 feet
and you hit the treasure room,

then we make a new plan.

By then, we'll be
around the collapses,

and we might already be there.

‐ As dawn breaks
over Breach 6,

excavation continues
towards metal deposits

detected over 20 feet
below the surface.

After the major discovery
of red marble...

‐ I'm not really sure
what I have here.

‐ ...determined to be
quarried from France...

‐ King Louis XIV used this

in the Palace at Versailles,

so this is
a very famous marble.

‐ Narrator:
..with further confirmation

from their treasure hunting
partner Chuck...

‐ It was already in the maps

that they built
the marble fortifications

before bringing in
the treasure.

‐ ...and the Robert Curtis
tapes...

‐ Marble.

‐ ...at 25 feet and still
no sign of treasure,

Rick's getting impatient.

‐ We're making good progress
at Breach 6,

but I would have thought

we'd reach something by now.

We're down there quite a ways.

We've run into timbers...

‐ Oh, yeah. Ooh.
‐ Oh.

Oh, it's hollow.

‐ I can't really think
of another reason

that there'd be wood
down there.

We've made it
through the marble layer,

and based on what we've seen
with the Bob Curtis tapes,

that's usually
the last indicator

before you get
to whatever it is,

whether that's
a treasure vault

or whether that's a tunnel.

We are expecting
to hit something very soon.

‐ It has some paint on it,

but I can't really tell
what it's saying.

That is a double block
I just found down here.

And that's what you would use

to raise or lower something
out of the shaft like this

if you didn't have a winch.

Hey, Johnny!

‐ Brett.

‐ It's a big old double block,
dude.

It's old. I don't know
how old it is.

It's pretty good shape.
‐ Keep digging, buddy.

‐ Yeah, dude.
Keep digging, man.

‐ Look at this. I just‐‐

Short chunk of rope.

I think I cut it
with the fin hoe.

I'll, uh, I'm gonna
throw this in the can

if you want to get it
up and out

and I'll keep digging.

We found some blocks.
We found some rope.

We found all kinds
of interesting things,

but right now we're not
finding anything else.

‐ I don't know, man.

We got to‐‐
We got to figure this out.

I mean, we're down there.
We're in the right spot.

We're there.

‐ Dude.

It's a pick head.

There's no handle at all
in it,

so if the handle's
rotted out of it,

then it might be old.

‐ We were expecting
to hit a void space

or a tunnel.

We've had plenty of evidence

to let us know
we're in the right spot.

After we got
through the marble layer

at the bottom of Breach 6,

what we're actually
running into now are tools.

There's got to be an access
to a tunnel.

There's got to be something.

‐ Got some more stuff.

Bunch of rope.

‐ As I unwind it,

they wouldn't have had this
in World War II.

‐ Here you have
this sudden opportunity.

The Americans are running
the Tokyo Trials.

People were looking for ways

to save themselves
and their families,

um, so deals were being made
left and right.

Many Japanese would give
intelligence

about treasure,

a massive treasure.

‐ No, I...
‐ Oh, man.

‐ What are you seeing, man?

‐ [ coughing ]
It's just a timbered‐up

toothpick caved‐in mess.

‐ Deep in
the Philippine jungle,

father and son miners
Levi and Geo

are making steady progress
with their demolition robot.

‐ We're trying to get
around the collapse

in the tunnel. We've been
in there chipping away

‐ They're building
a parallel passageway

to bypass the cave‐in.

‐ We've come a little
over 40 feet right now.

We should have been
broke through already.

There's a possibility that we
could have missed our mark.

You know, I hope we didn't.

You know,
looks can be deceiving.

I think we're close.

But we have no idea
what that drift is doing

on the other side of us.

There we go.

[ grunts ]

I'm hoping, if we break through
into the tunnel,

that it's open
and it's not collapsed,

that it's in good shape

or we can just get in there
and start bolting

and make some headroom.

When you go into
an old tunnel like this,

there's a lot
of different stuff

you have to worry about.

We've already dealt
with booby traps.

We're gonna deal
with bad ground.

There's bad gases
you can get into.

We're gonna have to use
due diligence.

We're gonna have to take
our gas detectors,

make sure we're checking them.

It's just hard saying.

You get into
those old tunnels,

a lot of gases that you get
will hang at knee‐high.

As soon as you start
to walk through them,

you'll start stirring them up.

‐ Ahh.

‐ We're hoping we find
a network of tunnels

that may lead us up
below the waterfall

where maybe there's gold.

Ultimately,
at the end of the day,

we want to find
some sort of treasure here.

‐ Down the mountain,

John and Rick sift
through the latest discoveries

found at Breach 6.

‐ How far down
below the marble

did you find this?

‐ Probably at about 5 feet.

‐ How far down are you?

‐ Oh, gosh, man,
we're 25 feet.

‐ You should be right at it.

‐ We've been looking.

‐ Got some more stuff.

Bunch of rope.

Dude.

Hey, guys.

Check this stuff out.

I got a little baby hammer.

‐ Wow.

‐ A bunch more rope.

I keep finding the rope.

I think I'm chopping it up
as I'm digging.

I just keep getting it out
in little pieces, but...

‐ Yeah, it's probably
so rotten.

‐ Yeah.
‐ Been down there forever.

Send that bucket of stuff
up here. Let's examine it.

You seeing this, Rick?

Lots of digging tools.

Just a steel...

‐ Yeah, an old pick,
a little piton hammer.

‐ If this stuff was
in one spot,

then I could see
how the mag would pick it up.

‐ John's concerned

the tools could be
the metal hits

detected
by the magnetometer scan

the tech team conducted
weeks ago.

‐ Anything more down there?

‐ Nothing left down there
at all.

I scraped the whole thing.

‐ It's not concrete cap?
‐ It's just rock.

‐ You know, let's see
what we really got here.

We got this giant bar,
this hammer.

‐ Looks like a digging tool.

This pick handle, you know,
it's a little off center.

It's not very worn.

Even this bar.

It's a little gnarled over
on the edge.

But the point on it's
almost pristine.

‐ Yeah.

‐ I mean, you could have,
like, even used this

to pry crates open with.

This rope is pretty curious.

You know, look at this.

As I unwind it...

You know, this is, like,
almost like blue nylon rope.

I mean, I know it's old
and dirty‐looking, but...

they wouldn't have had this
in World War II.

No, this is kind of
concerning to me, guys.

I'm thinking somebody
was here before us.

I mean, I know
it's old‐looking, but...

there wasn't nylon rope around.

‐ Yeah.
‐ Back in World War II.

‐ Nylon is a synthetic fiber

developed by the DuPont
Chemical Company in 1938.

Considered
stronger than silk,

nylon was first used
to make women's stockings

before drafted to create
parachutes and flak jackets

for Allied forces
during World War II.

Because DuPont was
working exclusively

with the U. S. military,

historians believe

nylon technology
did not reach Japan

until after the war.

‐ How in the world
would they get in there?

‐ I'm pretty sure
I would have seen something

if there had been any other
way in that hole.

‐ I mean,
you had that hard layer,

and the everything underneath,
it was kind of loose,

just like dirt, like this,
like rocks?

‐ It is solid.

I mean, it's just solid rock.

This is all modern stuff.

‐ Over the past few weeks...

‐ What is that?

‐ What does this
look like to you?

Does it look
like a big hard rock

or a big hard
chunk of concrete?

‐ ...the team has found
undisturbed layers

of concrete, charcoal,
and marble.

‐ So they didn't come up
from the bottom.

They didn't come down
from the top.

‐ These modern tools suggest
someone found another way

to get to the bottom
of Breach 6.

‐ The only thing
I can figure to do

would be to go down there,
fire up a jack leg,

and start rattling
on the walls

and just see
if we can find a soft spot

or a narrow shell.

‐ It wouldn't have to be big.

I know you guys are thinking,
like, mine shaft‐like size,

but, you know, if you go,
like, to Vietnam

or even in Japan, you know,

a lot of little tunnels
are in there.

I mean, we're talking, like,
a tunnel, like, this wide,

just enough for a little guy
to squeeze through.

It didn't have to be huge.

‐ If Brent and Farrell
find a tunnel,

it could confirm
John's suspicion

that another treasure hunter
beat them to the punch.

‐ No, it...
‐ Oh, man.

‐ Dude, it is...
‐ What are you seeing, man?

‐ [ coughing ]
It is caved in.

It's just a timbered‐up
toothpick caved‐in mess.

‐ [ bleep ]

‐ So you're seeing timbers.

‐ Yeah, guys, there's
definitely a tunnel

going this way, man.

‐ Can you get all the way
through it, do you think,

or what?

‐ I'm not even gonna
go into it, man.

It's‐‐
It's completely caved in.

I mean,
I'll poke my head in, but...

‐ Look how blown out it is,
dude.

Blown out
all the way back there.

‐ All the timber's broke,

so, I mean, it...

‐ Totally collapsed?

‐ Oh, yeah. It's caved
completely tight.

Every timber in there
is snapped or rotten.

It's‐‐It's no go.

We can't get into it.

‐ Whoever got in there
took what they could,

and they got out.

‐ This is not the way
I wanted this story to end.

‐ These vast amount of money

attract people who are
willing to torture,

uh, and maybe worse.

‐ Because we've been warned
in the past.

That concern is
just very real.

‐ If I were you, uh,

I would be very, very careful.

‐ After hitting a dead end
at Breach 6,

John and Rick turn
their attention

to the Golden Lily map
given to them

by famed treasure hunter
Chuck McDougald.

‐ I'm not trying to be greedy.

1% of the gross proceeds
would be enough.

‐ After negotiating
a partnership,

McDougald helped decode a map

that looked similar
to their mountain.

‐ Those four dark‐colored
ellipses,

my theory is that they
are access points

to the main tunnel.

‐ Narrator:
Based on his intel,

John and Rob scan
the mountain

to look for entrances
identified by Chuck,

including an old site
from last year.

‐ You came out of the bend,

yeah, and you hit it
right here,

and that's almost right
where the Back Door is,

and on this map is
right where this circle is.

Now that we have
kind of delineated

a couple other spots,

based on flying the drone
over it,

you know, there are
more possibilities on this map.

You know, so we have
Breach 6 here,

and we have this diagram
saying, you know,

tunnel going that way.

You know, maybe it's possible

that these two tunnels
running off of here

is really like a tunnel

that ran through the middle
of Breach 6,

like we always thought.

Last year we thought that,

from the Back Door
to Breach 6,

it ran in a straight line.

And maybe this diagram
is saying that, too.

‐ According
to Chuck McDougald,

these symbols indicate
three boxes of gold

buried on this mountain.

Although recent evidence
suggests

the treasure from Breach 6

may have already been
recovered,

there still could be
two boxes left.

‐ At the Back Door last year,
I mean,

we did punch in
to the bottom half

of the back side
of a void space.

We just couldn't do anything
with it.

‐ There's got to be
another access

into this Back Door somewhere.

Maybe Max and Colin,
with a little more scan work,

they can find an access
over there that's shallower.

That might be our Hail Mary.

‐ Well, if there's
an easier way

to get
into this tunnel system...

I think it's a good shot.

‐ In the U. S.,

head researcher Bingo Minerva
is trying to figure out

who else might be
after Yamashita's treasure.

Recent suspicious encounters
on the mountain...

‐ You seeing that?

‐ ...along with dire warnings
from Chuck

has the team spooked.

‐ When they think
you've found a treasure,

they might step in

and either steal it from you

or just kill you
right then and there.

So Bingo wants to know

if their safety is
truly in jeopardy

and how deep
the treasure conspiracy goes.

To get answers,

Bingo's meeting with author

and New York Times contributor
Roland Kelts...

‐ Hey, Roland.
‐ Nice to meet you.

‐ Pleasure to finally
meet you, sir.

‐ ...who's uncovered
covert operations

by the United States
government

involving
Yamashita's treasure.

‐ On our mountain, we're
getting a lot of attention,

and a lot of it could be
just paranoia,

but I'm really wondering
who historically

would have been interested
in this treasure

and who may have
benefitted from it,

who might be after us
if we do find something.

‐ You know,
to really understand

the story of this treasure,

uh, and how deep
and how distant it goes,

uh, you have to go back
to what I would call

a key point or pivotal point
in‐‐in history,

which is when the man

who oversaw the American
occupation of Japan

and was arguably the most
powerful person in Japan

at the time,
the ruler of Japan,

when he learns
about this massive treasure,

uh, hidden in the Philippines,

and that man is
General Douglas McArthur.

‐ After Japan's
official surrender

on September 2, 1945,

Allied occupation of Japan
began,

led by the supreme commander
of the Allied powers,

U. S. General Douglas McArthur.

‐ Well, McArthur,
he was the king of the roost.

‐ A five‐star general,

McArthur commanded
successful military campaigns

from World War I
through the Korean War.

After World War II,

McArthur ordered
the Tokyo Trials,

a military tribunal

to prosecute the leaders
of Japan for war crimes,

with the exception
of General Yamashita,

who was tried separately

and sentenced to death
beforehand.

‐ The Tokyo Trials
were meant to be

a rough equivalent of
Nuremberg Trials in Germany.

However, as we know,
in Germany,

there were several parties
at the table.

In Japan, largely,
it was the Americans.

‐ Allegedly,

McArthur led an effort
during the Trials

to extract intelligence
from the Japanese defendants

in exchange
for reduced charges

or in some cases
even complete exoneration.

‐ So here you have
this sudden opportunity.

The Americans are running
the Tokyo Trials.

People were looking for ways

to save themselves
sand their families,

uh, so deals were being made
left and right.

Many Japanese who would
give intelligence‐‐

intelligence about
military campaigns in Asia,

about communist China,
about Soviet Russia,

and intelligence
about treasure,

a massive treasure.

That's how
someone like McArthur

got access to all
this information.

‐ According to Roland,

McArthur alerted
President Truman

to the war loot
hidden in the Philippines,

effectively launching
a covert American operation

to extract the treasure.

‐ You saying General McArthur

all the way
to President Truman?

I mean, those are
some really bold claims.

Is there any actual evidence
to back this up?

‐ Well, you know, actually,

it's kind of extraordinary

how much evidence there is.

Here was a treasure chest

you could dip into
without regulation,

without Congressional
approval...

‐ Seeing anything?

[ gas detector beeping ]

‐ In the U. S.,

Bingo is learning

that knowledge
of Yamashita's treasure

could have reached
as far as the Oval Office.

‐ I have here material
that quite explicitly shows

that General McArthur
was knowingly involved

in capitalizing on this loot
that the Japanese had stolen,

uh, but also that he knew
how it could be used.

‐ While researching
connections

between the U. S. government
and Yamashita's treasure,

Roland uncovered recently
declassified documents

drafted by General McArthur
to President Harry Truman.

‐ This is a report
from McArthur.

Now, these documents were not
publicly available at the time.

‐ Okay. So declassified‐‐

‐ What we have
is declassified information,

and the fact that he has
actually found,

uh, this treasure...

and has declared

that, uh, he can keep it.

These are McArthur's words
right here‐‐

"We have legal right

"to access
all of these valuables,

"precious metals and stones

"belonging
to the Japanese government,

and valuables belonging
to designated individuals."

So anyone scheduled by SCAP‐‐

Supreme Commander,
who is McArthur himself...

‐ Now, he's saying
he can legally do that.

‐ Exactly.

If you're
the Supreme Commander

of your occupation,

you can declare
what the law is.

‐ What did they do
with this information?

I mean, they know
treasure's out there.

They know there's
a great amount of wealth there.

I mean, why was he even
interested in this?

‐ World War II may be over,

but America is on the verge
of the Cold War.

The USSR and the United States

are building up
their nuclear arms,

and it certainly costs money
to do the intelligence.

‐ In order to gather
this intelligence research,

Truman created the CIA
in 1947.

Some speculate

McArthur and Truman
pursued Yamashita's treasure

to build a war chest

to finance covert operations
against the Soviets.

‐ A fund was developed.

It's a‐‐It's a fund
of many names, actually.

Probably the most common
are Black Eagle Trust

and also the M Fund.

‐ It's alleged that,
for decades,

gold recovered from
Yamashita's treasure

launched
the Black Eagle Trust Fund

or M Fund,

to finance the most daring
covert operations

during the Cold War.

Laundered through 172 banks
in 42 countries,

this money was all hidden
from Congressional oversight.

‐ Here was a treasure chest

you could dip into
without regulation,

without Congressional
approval,

without even a vote.

You can decide
what you want to do

because you have access
to all of this wealth,

and it's off the books.

‐ Is there any evidence
to support

how much was in this fund?

‐ [ chuckles ] Yeah.
Well, uh,

here was have hard numbers,
bank records...

‐ In addition to secret
reports from McArthur,

Roland also uncovered
declassified bank statements

connecting key members
of the general's staff

to large amounts of gold.

‐ And the amount is
20,000 metric tons.

‐ 20,000 metric tons.
‐ Of gold bullion.

These are photos of Marquardt,

who was one
of General McArthur's men

and who was the one,
uh, whose name

is on what is known
as the M Fund,

uh, otherwise known
as the Black Eagle Trust.

‐ Mm‐hmm.
‐ The "M" in M Fund

is not McArthur‐‐

uh, obviously, McArthur
didn't want his name on it‐‐

uh, but Marquardt,

who was one of McArthur's,
uh, lackeys.

‐ Brigadier General
William Marquardt

headed up McArthur's
Economic and Science Division

during the occupation of Japan
after World War II.

It's alleged Marquardt
used his position

as a cover to set up these
accounts around the world.

‐ McArthur and his cronies,
um, they were willing

to do whatever it took
to get access,

really,
to this buried treasure,

so it means obtaining maps,
obtaining information.

Uh, and they would go so far,
allegedly,

uh, as to resorting
to torture,

uh, in one case,

torturing General Yamashita's
limo driver

in order to get information
they wanted and needed

to find this buried treasure.

‐ You know, it's interesting
you say that

because we've been warned
in the past.

I think again,
as we get closer,

that concern is
just very real.

‐ Well, we know that these guys
have done in the past,

uh, from this evidence, um,

these vast amount of money,

uh, attract people
who are willing to torture,

uh, and maybe worse,

in order to get
their hands on it

or to protect it
or to keep it to themselves.

So honestly, if I were you,

uh, I would be
very, very careful.

‐ Many believe
the Black Eagle Trust Fund

is still used to this day

to finance
covert CIA operations,

meaning efforts
by the U. S. government

to uncover
Yamashita's treasure

may still be going on.

‐ It's a dangerous situation.

‐ Back in the Philippines,

miners Levi and Geo
continue digging

around the tunnel collapse.

‐ It's going good.

It's back‐breaking work,

but we've definitely made
a lot of progress.

I really hope we're getting
close to breaking in,

so once we get
inside of there,

I'm excited to see
where this tunnel goes.

My greater hope
for this tunnel

is that we can get in here,
safely catch it all up,

and that it connects
to a network

of tunnels inside the mountain

and potentially
have treasure in it.

Look at that, Geo.

‐ It fell through!

Oh, yeah. She's open, man!

Nice, dude.

‐ I'm gonna open this hole up
a little bigger.

I'll get it to where we can
get in there and take a look,

and I'll probably crawl
through there

and see how bad of shape
it is.

When you go in an old tunnel
like this,

there's a lot of different stuff
you have to worry about.

We've already dealt
with booby traps,

and this is something that we
can be dealing with in here.

I'm really hoping,
now that we're broke through,

we can find a clear passage
up to the waterfall.

‐ Go slow.
‐ Yeah.

[ grunts ]

Ooh.

‐ You seeing anything?

‐ I see some timbers.

‐ Can you tell
how far it goes?

‐ No, I can't.

It looks like
it's turning a corner.

[ beeping ]

Get out of here!

[ coughing ]

‐ We got into high
carbon dioxide in there, man.

Wasn't hardly any oxygen
at all back in there.

‐ It's hard to breathe.

‐ The carbon dioxide
will overtake.

Overtakes oxygen, you know.

I know from different
mines I've worked in

that you will get these pockets
of carbon dioxide.

They can be caused
by volcanic formations,

and what'll happen is
that carbon dioxide is

1 1/2 times heavier
than oxygen,

so what it'll do is,

when you get into an area
that's confined like this,

it'll actually overtake
the oxygen,

and it'll hang
about knee height.

You're gonna take one breath,

and you're gonna hit the floor,
and you're dead.

‐ After allowing oxygen
to cycle into the tunnel,

Levi and Geo go back in

to check
the carbon dioxide level.

‐ Keep an eye on that.

I'll let you in front of us.

If you start getting
a high gas rating,

we'll shut down.

You can't be complacent
when it comes to these gases.

If you don't have
a gas detector,

a lot of these gases
that'll get you,

like carbon dioxide,
carbon monoxide,

all these, they're senseless,
colorless, odorless.

You won't even know

that they build up
in your bloodstream.

They'll slowly build up

to where you're
sicker than a dog

and you can't work.
Worst case scenario,

you start getting disoriented.

You end up going down.
Don't even know what happened.

[ beeping ]

‐ We don't want to go
no further than this, Levi.

We got‐‐
Our oxygen's messed up.

[ beeping continues ]

‐ Getting bad?

‐ Well,
we've got low readings,

but we don't dare
go any further.

‐ Let's get this whiz bang
hooked up.

‐ Get this thing ventilating.
‐ Yeah.

Pull these hoses up here,
get it hooked up,

and get ventilation in here,

and then we'll get
back out of here

for a couple of hours.

‐ They're pumping
outside oxygen

into the tunnel

to flush out
the remaining carbon dioxide.

[ oxygen hissing ]

‐ Every time we make a head‐‐
little bit of headway here,

we get pushed back two steps.

It's been this way
the whole time.

Now we got bad gases.

Hopefully we've given it
enough time to ventilate

and get all that gas
blown out of there.

‐ At the bore hole site,

the horizontal drill needs
to get past the manmade hole

the team encountered on their
way to the waterfall,

still 700 feet away.

‐ But with no way
to keep water sealed

around the drill as it moves
through this open space,

they're worried
it could break down.

‐ Because we hit that tunnel
down there,

we lost
all the water pressure.

In order to reach the tunnel,
get the water pressure back,

got to be able to send
a sleeve down in there

and sleeve
right across the tunnel

so the drill bit can hook up
back up on the other wall

and continue going.

‐ Installing a metal sleeve
across the hole

will support the weight
of the drill,

allowing it to bridge the gap

and continue
toward the target.

‐ It's seated.
‐ Yeah.

‐ What happens
if we don't make a seal

and get water circulation
back?

‐ If this don't work,
we're not gonna see nothing

and all this
will have been a waste.

This has got to work.

Give it a shot.

‐ All right!
‐ All right! There it is!

Here we go.

‐ Ready to rock now.

We've sleeved over the area

that was the void space
that we hit,

and we're back on track

to get to the waterfall void.

That stretch of mountain
that we gotta go through,

there's a lot
between here and there.

We really got a significant
undertaking here.

I hope we get there.

‐ If I tilt it up, I can show

where the ERT's find
was collected,

and you see this‐‐
this large resistor.

‐ Yeah, we got to get in there.

I mean, I got to figure out
a way to get in here.

‐ Turn your light off
real quick, Geo.

I can see daylight.
‐ What is going on?

‐ With progress stalled
in Breach 6,

John's revisiting
an old site from last year‐‐

the Back Door.

‐ Last time we were
at the Back Door,

we had some issues there.

You know, we couldn't really
get to the target.

I don't see anything in here.

It's a bunch of rocks.

As much as we tried last year
and couldn't get into it,

I think
it's pretty significant

that it lines up
to McDougald's map.

Now more than ever,

I want to get back down there
and revisit this thing.

I think
we walked away too soon.

‐ Based on Chuck's map

and confirmation
from the drone scout,

Max and Colin gather data
about the Back Door,

hoping to find a void space

that could indicate
a tunnel or treasure.

‐ We've set up an ERT line,

electrical‐resistivity
tomography,

over the top
of the Back Door void,

and what that's gonna give us

is, if there's a void space
under this area,

air does not conduct
electricity at all,

so it's gonna be
a big red hot spot

right in the middle
of the data.

So using our ERT, seismic,

and hopefully
some ground‐penetrating radar,

we'll be able
to image that void

and give them a solid target

that, if they drill
right where I tell them to,

they're gonna hit‐‐
they're gonna hit the void.

‐ Later that day...

‐ Just to get you oriented,

what are you looking to get

out of this whole, um,
data set here?

‐ Basically,
we're looking to see

if this Back Door

or there's any relation
to this Back Door

to get into
this tunnel system.

Well, we collected a ton of ERT
over at the site.

And, of the whole area,

this is their whole
Back Door site.

If I tilt it up, I can show

where the ERT's find
was collected,

and you see this‐‐
this large resistor.

‐ John: Wow.

‐ I suppose it could be a void,

um, but I don't‐‐I don't know.

It's looking like maybe
about 6 to 15 feet in height

and maybe 15 to 30 feet across.

‐ Yeah. That's‐‐
You know, that's big enough

to, like, be something.

‐ The shortest way
and the most definitive way

to know that you're going
in the right direction

is through this spot

right through
this resistive blob.

‐ Yeah. We got to get
in there.

I mean, I got to figure out
a way to get in here.

‐ Using the tech team's
GPS coordinates,

Rick and heavy machine
operator Steve

search for the spot
to access this new void space.

‐ Yeah, it is
right‐‐right here.

Right here.

Under our feet is a huge
void space, man.

I just need to get
a work pad cleared in here.

We can get these boulders
moved out.

I need a big, flat
work space area here.

Getting all this confirmation
about the Back Door

is like finally finding
the last piece to the puzzle

that's gonna get us
in this mountain.

With the new data
that we've got,

we know that that void space
comes almost to the surface.

The big hope is that
we've found access

into this mountain.

‐ At the tunnel site,

after pumping in fresh air
for over five hours...

‐ Hopefully we've given it
enough time to ventilate

and get all that gas
blown out of there.

‐ ...it's time
to get back to work.

[ oxygen hissing ]

‐ All clear to here.
Looking good.

‐ Geo's done his checks
back there.

All the gases look clear.
Oxygen levels are good.

Now we're able
to get through this hole

and get everything barred down
and start exploring,

we're gonna get back in there,

and we're gonna see
where this tunnel goes.

‐ Oh, that ground looks
a little shaky.

This ground is really
edgy in here, Levi.

I'm through the break‐in,

and on the inside
of the tunnel,

the ground is very sketchy.

The rock is super oxidized,

and the timber's just
virtually rotted to nothing.

So we're gonna have to be
really careful

repairing this thing.

It's gonna be time consuming.

Look at all the clay
and mud in the ground.

‐ And it's all held together
by this mush.

I think we're gonna
have to go slow

when we go through here
and bar it down really good.

‐ Yeah.
‐ Take our time

and get as far ahead
as we can

to give us an idea of what we
have ahead of us, you know?

We just broke through
into the old tunnel.

I can see in there.
It's not totally collapsed.

I mean, there is
some sort of a void.

It's awesome that we hit it.

‐ So how far in here
to you think we are?

‐ I bet we're in here
700 to 800 feet now, man.

‐ As the miners head
deeper into the old tunnel,

the probe the walls,

looking for any weak rock

which could trigger
another cave‐in.

‐ Hey, Geo.

We got another giant wreck.

It's getting worse
all the time, man.

Hopefully I can get a hole
opened up

and we can see in there.

Hopefully
it's not plugged tight.

Turn your light off
real quick, Geo.

There's light coming
through here.

That's got to be the surface.

‐ What is going on?

‐ On the next "Lost Gold
of World War II"...

‐ Rob: Here we go.

I'm gonna send smoke
coming out of that opening.

Whoa, whoa, whoa. Stop, stop.
What's that right there?

‐ You see this big
diamond shape here?

If we can find that, I think
we can start to figure out

the rest of this map.

‐ It doesn't make any sense.

It goes from solid rock
to sand to solid rock again.

‐ Come on, baby, get in there.

Come on, Steve, push it!

‐ I can't do it, man.

‐ I think maybe
I'm just pushing

this whole Back Door thing
too hard.

There's got to be
a better way in here.

I don't know.

Captioned by
Los Angeles Distribution
and Broadcasting, Inc.