All language subtitles for Shark.Week.2024.Expedition.Unknown.Sharks.vs.Nazis.in.Paradise.1080p.WEB.h264-FREQUENCY

What could be more dangerous than the
waters off Florida than sharks? Two

Josh. Nazi submarines.

There were three ships that were
torpedoed by the Nazis, and one of them

still missing.

The Norlindo. Yeah.

Let me make sure I got this right. You
want to use sharks to find a shipwreck?

That's exactly what I want to do.

You are going to be in the water with
more sharks than you have ever seen on

of your other dives combined together.

There's a fall shark!

And another!

We need to catch a shark?

Yeah. Sounds safe.

It's shark camp.

The shark is going to be showing us
where these wrecks are.

He's got it. He took it. We know where
they're going and what they're seeing.

literally bit this hook in half. Look at
this structure. This thing is huge.

Look out. He's turning this way.

There's something in front of us.
There's a wall. Oh, my God.

Welcome to the Florida Keys.

Sure, it looks like paradise, but
beneath the surface of the Gulf of

one of nature's fiercest hunting
grounds.

The deadly bull, tiger, and great white
are among the 25

shark species that prowl these waters.

But for eight terrifying months at the
start of World War II, sharks are

overshadowed by a far more dangerous
threat, Nazis.

Up and down the eastern seaboard and
shockingly close to U .S. shores, German

submarines aggressively attack Allied
merchant ships carrying vital supplies.

And on May 4, 1942, the Gulf sees its
first combat casualties of the war when

Nazi U -boat torpedoes three American
vessels.

Sixty -two sailors are lost at sea. Easy
pickings for hungry bull and tiger

sharks.

And the SS Norlindo.

SS Joseph M. Cudahy and SS Munger T.
Ball sink to the seafloor with hundreds

thousands of gallons of oil and fuel
trapped inside them. The other two ships

have been located, but the Norlindo and
her trapped fuel remain lost.

A hull breach could be an environmental
disaster, threatening essential shark

breeding and hunting grounds.

This is a dangerous mission with deep
dives and deadly predators.

But I'm joining eminent shark
behaviorist Dr. Tristan Guttridge to

the missing tanker, to reveal a lost
story from World War II, and to protect

sharks of the Florida Keys.

The past is all around us. Oh, this is
crazy.

A world of mystery.

This is a plane. Yeah.

Danger.

We are about to be underwater.

and adventure.

I travel to

the far corners of the Earth to uncover
where legends end and history begins.

I'm Josh Gate, and this is Expedition
Unknown.

My search for the time bomb tanker
begins where the continental U .S. ends.

I'm driving the Overseas Highway, a 113
-mile -long engineering marvel that runs

over open ocean and connects 44 small
tropical islands or keys, the very last

which is the famously laid -back Key
West.

This vacation mecca isn't just a hot
spot for parrot heads looking for a

cheeseburger in paradise.

It's where I've come to meet my old
friend, shark expert, Dr.

Tristan Guttridge.

Dr. Guttridge, I presume. How are you
doing, sir?

What's up, man? Good to see you. Great
to see you, buddy.

You well? I'm really well. Last time I
saw you, we were diving with Captain

Kirk. Yeah, I know. It's surreal.

And today, I've got one hell of an
adventure for you.

The Norlindo.

The Norlindo, yes. There were three
ships that were torpedoed by the Nazis,

one of them is still missing, the
Norlindo. So how are we going to find

ship? We're going to do it by diving on
one of the other ships that was sunk

during that attack, the Munger T -Ball.
We're going to dive on the Munger T

-Ball. We are. Nearly 150 feet down, and
we've got to go 50 miles offshore to do

it. Well, it sounded a lot like you said
50 miles offshore. Yeah.

50 miles. We're going 50 miles off the
coast. This is going to provide that key

clue that we'll hopefully find as the
Norlindo.

And I'm guessing because you're here,
it's going to be sharky. You guessed it.

You are going to be in the water with
more sharks than you have ever seen on

of your other dives combined together.

No way. It is so untouched out there. It
is remote. It is deep.

It's sharky.

Okay. Should we do it? Yep.

Tristan is anxious to see the Munger T
-Ball, or more specifically, the sharks

that live there. It's a prospect that
leaves me both excited and the exact

opposite of excited.

We pull away from the dock for our 50
-mile journey out to sea.

Joining us on the mission is Dr. Corey
Malcolm, an expert on the shocking

history of how close Hitler's forces
came to American shores.

So question number one, what could be
more dangerous in the waters off Florida

than sharks?

Two words, Josh.

Nazi submarines.

How bad a problem was this?

It was a terrible problem. At the outset
of World War II, the Nazis instituted

what they called Operation Drumbeat.

And they sent their U -boats across the
Atlantic to the American coast and

basically shot ships with impunity.

How many ships did they take out?

Through the first part of 1942, they
took out over 600 ships. And with that,

,000 to 6 ,000 people were killed.

That's more than twice as many people as
Pearl Harbor. Why didn't I learn about

this in school?

Well, you know, honestly, people didn't
know about it back then.

These attacks were hushed up by the
government at the time to prevent panic.

After the war, they were largely
forgotten, making this mission more

than ever.

So let's talk about this particular
incident, these three ships that get

out in this attack.

This happens when?

May 4th, 1942.

That's the day the war came to the Gulf
of Mexico.

One U -boat in particular, the U -507,
penetrated into the Gulf of Mexico right

past Key West.

Right here.

Detailed German logs tell us that at 5
.42 in the afternoon, U -boat 507 fires

torpedo into the stern of the SS
Norlindo, which sinks in just three

At 1 .30 a .m. on the 5th, the same sub
attacks the Munger T -Ball, which

quickly goes under. The nearby Joseph M.
Cudahy sees the attack and radios it

in. And when the Germans intercept the
message, they have their final target.

And think the Cudahy just 149 minutes
later.

Now, two of the three ships have been
found, correct?

Exactly. The Cudahy and the Munga T
-Ball. You know, and these ships were

carrying this fuel oil, which supplies
them as they're traveling through the

Gulf of Mexico. And this was trapped in
their hull.

Fortunately, the National Oceanic and
Atmospheric Administration, or NOAA, is

the case.

In 2021, NOAA was able to extract 35
,000 gallons of leaking oil from the

T -Ball and are planning a similar
operation on the Joseph M. Cudahy. The

Norlindo, though, is an even bigger
threat to the Gulf. It carries over a

quarter million gallons of oil. And if
it were to rupture, the resulting spill

could be catastrophic to marine life,
including sharks.

This wreck is a ticking time bomb that
needs to be found.

So a simple question, why hasn't it been
found? Why can't we find the Norlindo?

Simple question. You would think there's
an easy answer. Here you can see a

chart showing the locations of the two
known wrecks.

Along with the known locations of the
Ball and the Cudahy, the reporting on U

-Boat 507's busy day includes data from
the Nazi logs, testimony from survivors,

and finally, records from the rescue
ships that arrived later.

Together, they give us an immense search
zone of hundreds of square miles to

find the Norlindo.

It's all over the place. It's a lot of
confusion.

So now I see the problem.

So we've got a wreck that's a huge
threat to the environment and to sharks,

quarter of a million gallons of fuel on
board, and a story that demands to be

remembered with a loss of life, right?
Absolutely.

You're taking us to the Munger T -Ball
to start?

That's where the hunt begins.

All right.

Tristan thinks he knows of some
witnesses who've already been to the

and may be able to show us the way.

That's the good news. The bad news is
that those witnesses are sharks.

Specifically, bull sharks and tiger
sharks, apex predators well over 10 feet

long that weigh more than 1 ,000 pounds.

To conduct the world's most dangerous
interview, we take our vessel on the

journey more than 50 miles out into open
ocean, where the rest of Tristan's team

is waiting above the wreckage of the
Munger T -Ball.

We gather for a safety briefing with Dr.
Yanis Papastamatou and dive master

Craig Jeff.

And I take it you're going to be keeping
it safe out here?

Yes, sir. And how are we going to do
that?

So this is the Munger T -Ball wreck.

It is a serious dive, guys.

the depth on this dive is 140 feet this
is an exceedingly remote site okay so

a lot of the animal life a lot of the
pelagic life out here will not really

seen humans very often if at all and
because they haven't seen them then they

may be slightly more

Inquisitive, they may be slightly more
territorial, and they may be slightly

more aggressive.

And will they come in from the sides,
from underneath? Like, what's their

profile? They will come from 360 -degree
field of attack.

So we have to be exceedingly aware of
ourselves, our surroundings, and our

okay, at all times on this dive.

And what's going to keep me from getting
ripped to shreds down there, Tristan?

We're going to give you a stick.

A stick? A poker, yeah. Oh, good. That's
an official term, a poker? Yeah.

Just another form of protection. If they
do get in your personal space, you can

kind of push them off.

Right. Also, the shark's good nature.

Sure, yeah.

Sharks, famous.

Famous for their good nature.

Great. Okay, so I got a stick and a
prayer. All right. Should we get into

Yep. Let's see what's down there. Come
on.

In addition to watching our backs, we
need to watch the clock.

When we reach the wreck at 140 feet,
we'll only have a few minutes of bottom

time before the risk of decompression
sickness sets in. And at 50 miles

offshore, timely medical attention is
not an option.

All right, heading down. Here we go.

Visibility looks good so far. Very clear
blue.

As we drop down, we're swarmed by
schools of amberjack. After more than 80

on the otherwise featureless bottom of
the Gulf, the Munger T -Ball has likely

transformed into an artificial reef, a
thriving habitat for prey like these

and the shark predators who feed on
them.

Passing 50 feet, visibility's definitely
dropping off now.

Yeah, I can't make out the bottom of the
wreck.

There's a shark!

Right there!

Right there!

Yeah,

that's a bull shark!

Look at that big bull shark!

It's a top predator in this system.

They're basically a shark that eats
other sharks.

Not something to mess with.

Growing up to 12 feet long and weighing
in at 1 ,300 pounds, Bull sharks are

notoriously aggressive and unpredictable
ambush predators.

They literally have hundreds of inch
-long, knife -edged teeth.

But don't worry, I've got a stick.

With a flick of his powerful tail, the

big bull surges forward at 25 miles per
hour.

I'm off the Florida Keys diving almost
140 feet down to a wreck called the

Munger T -Ball, a freighter sunk by a
Nazi submarine in World War II. Now it's

become an artificial reef that is a
hunting ground for some of the Gulf's

predators. That was too close.

It was just curious.

Fortunately, we're not on the menu
today.

The farther down we go, the shorter our
clock becomes if we want to avoid the

bends. But Tristan believes this wreck
is essential to finding the lost ship,

the Norlindo, if, that is, we ever get
there.

Is that the bottom?

No, sir, that's a wreck.

Bull sharks thrive in murky water, where
they can sneak up on their prey.

Using what's referred to as the bump and
bite technique, they grope about for

food in the darkness and latch on with
jaws that bite at 1 ,300 pounds per

square inch. The average nail gun uses
only 130, so...

Good luck with that.

All right, I'm going inside.

We're over 140 feet deep. We've only got
two minutes of time at this depth

before we have to go shallow.

Copy that.

It is so airy in here.

Yeah, 30 people died in here. This is a
war grate.

I think it's time to go, guys. We're out
of time. We've got to go.

Copy that.

As we make our way topside, we'll have
to run the gauntlet again.

More sharks out here. Look at that.

All right, Tristan, I have to say, an
amazing experience seeing this wreck.

But the question is, how is this going
to lead us to the Norlinda?

It has to do with those sharks.

What do you notice about them?

Well, they're definitely circling us and
circling the wreck.

Exactly.

These sharks know where this wreck is,
and I can guarantee you they know where

other wrecks are in the vicinity.

So, let me make sure I got this right.
You want to use sharks to find a

shipwreck? That's exactly what I want to
do.

Okay?

Back on the boat, Tristan tells us how
we can use sharks like these as spies to

find the Norlindo and avert an
ecological disaster.

So as you said down there, these sharks
know where it is.

Yeah, sharks use wrecks. How do they
know where these wrecks are? They're not

using Google Maps down there. Like, how
do they come back to these wrecks? So we

know that sharks can detect the Earth's
geomagnetic field, and we know that a

massive steel hull causes essentially an
anomaly in that magnetic field.

Sharks have a remarkable sense receptor
organ known as ampullae of Lorenzini.

These small mucus -filled pores are
concentrated around a shark's mouth and

snout and give them a sixth sense, the
ability to detect electrical and

fields, such as those generated by their
prey or an enormous metal shipwreck.

It's likely the shark can detect that
massive ship long before they can see

Wow. So they're able to navigate back to
it, maybe use it as a waypoint. It's

like having a built -in GPS.

And so you think those sharks can lead
us to the Norlindo? We just have to get

them to show us where it is. How do we
do that?

We're going to use trackers, and we have
two different kinds. The first one is

an active acoustic tracker, and the
second is a camera tag. A camera tag?

Yeah, and essentially it's shark cap.

So the shark is going to be showing us
where these wrecks are.

Amazing. So how do we get these trackers
on the shark?

We need to catch one. We need to catch a
shark?

Yeah, we need to catch one.

All right, let's catch a shark.

Sound safe?

I never thought I'd say this on a Shark
Week show, but to catch a shark, well,

we're going to need a smaller boat,
specifically one that's more

that we can get close enough to place
our cameras on the sharks.

Okay, what is this? So this is a cat
tag.

What we have here is a video camera.
This gives us about 10 hours of footage.

So the sharks are going to be filming
for us?

Yes, exactly.

Okay, amazing.

And I'm sure they work cheaper than
Brian.

Not much.

The tag clamps to the dorsal fin and
records everything the shark sees until

special fastener dissolves in seawater
and the device detaches and floats to

surface. So a day from now, this thing
pops back up.

And what we have here is a satellite
transmitter that's going to send a

to the satellite that gets back to us
via email saying this is where the tag

Okay.

To find sharks, the tag near the center
of our established search zone. We head

toward a ubiquitous site in these
waters.

Shrimp boat.

It's a great place to find sharks. You
know, these guys are obviously de

-heading the shrimp.

So the sharks follow and eat the scraps,
basically. This is the dinner bell.

Exactly. I'll throw a few...

Little fishes and we'll see what they
do. Okay.

Throw some bait in.

If you've ever wondered how long it
would take a hungry shark to smell you

the water, stand by.

What is that?

Yeah, something's coming in now. Look at
this. Wow.

We got sharks everywhere.

The entire surface just became alive.

These are silky. These are silky sharks,
yeah. There must be 20 of them just

boiling up at the surface here. These
juvenile silky sharks can ultimately

as large as 8 feet.

Named for their silky smooth skin, these
sharks still have flesh -ripping, razor

-sharp teeth.

Fun fact, they're the most abundant
shark species on Earth.

And it looks like all of them showed up
for dinner.

I assume these sharks are a little too
small for us to be putting a camera tag

on. Yeah, these are way too small. These
silkies have really small dorsal fins.

They're not going to work. So what we
want is one of these big bull sharks.

there should be some bulls in this
community here. You can see a bull down

right at the base. Ah, look at that!
There is one here. Big boy! Two of them!

Throwing small pieces of fish got us
small sharks.

But to get the attention of one of these
bulls, we need to...

scale up our ambition.

All right, well, we got some bait.

Perfect. And we've got a big bull right
underneath us.

To keep the bull from taking our shark
cootery board to go, the bait is

to a carbon steel hook and two buoys
called polyballs, which will let us know

where he goes as well as tire him out.
Here we go. We got a bull coming in.

Oh, he's got it. He's on it.

Here we go. He's off.

You can't dive not with two barrels on
them, you can't.

Charles?

Oh, boy.

I think he's back for his noon feeding.

I'll do the whole movie. I don't care.

I'll do the whole thing, end to end.

It takes the entire team to wrangle this
shark.

A powerful bull can rip the line right
through your hand.

Or worse, pull you under.

Coming up.

But when we try to bring the bull in...
Spit it out?

Shoot through, spit it out.

Bigger hook in half. Look at that.

He literally bit this hook in half.

Pound for pound, the bull has the
strongest bite of any shark.

Their powerful jaws can even crush bone,
or in this case, a carbon steel hook

rated to hold 4 ,000 pounds.

That shouldn't happen. I've never had
one bite the end off like that. It's

ridiculous. That bull shark went through
that like butter.

You got more of these?

I've got more of those. Let's catch
another one. Let's do it. Come on.

We send out the bait.

It's going its way.

And in a matter of moments, an even
bigger bull is on our line.

Just let it go.

And he's running. Here we go.

Diving. Definitely on. Both buoys are
down.

He's going this way.

I see him down there.

I think we can start pulling in this
shark.

Here we go.

That's a big shark.

But when you're working with a creature
that's more than 10 feet long and

packing 600 pounds of pure muscle, the
advantage goes to the shark.

Okay. Here we go.

Just keep him on the... Overboard right
there.

Ooh, the other one's with him.

Grab the dorsal.

I got it.

Josh, watch out.

Got it?

Careful. Someone got my hand!

In the warm waters of the Gulf of
Mexico, I'm helping Tristan Guttridge

camera to a massive bull shark.

Why? Well, right now that's a question
I'm asking myself.

Here we go. Try again.

I'm on the dorsal fin.

I'm good here. I got the dorsal.

To be this close, to be holding this
creature against the boat.

It's absolutely awe -inspiring. It is
just huge, and it is just pure muscle.

It's unbelievable.

We're hoping to use the shark as a
cameraman to locate the wreck of the SS

Norlindo, which was sunk by a Nazi U
-boat somewhere nearby in 1942.

Okay,

pack is on. Here we go.

The camera is attached, but we're still
at risk.

Yanis turns the shark over and, with a
few quick movements, puts it into a

known as tonic immobility, basically a
trance where, for a brief, blissful

moment, she won't bite at our hands as
we release her. Then we're safe to let

her go.

Ready?

Go! Woo!

All right.

Norlindo, here we come.

All right, that shark is off to make its
first motion picture.

Sharky for Daisy.

Marty, Shark Daisy.

Marty for Sharky.

Steven Sharksburg. Quentin Sharkantino.
It doesn't matter. I'll think of it

later. The point is that shark's got a
camera.

Remember, that footage belongs to
Discovery.

Just don't post that footage on
OnlyFans.

All right, we got one down.

Let's do it all over again.

For the next few hours, we catch and
place camera tags on four more sharks.

more to go.

Building a first -of -its -kind camera
crew to locate the wreck of the

He's got it. He took it.

Yeah,

go find the wreck.

Okay, we got it. We got it.

The bulls are out filming with the
camera tag, but we won't get to see the

results for a day.

To actively track the shark population,
though, Tristan wants to use acoustic

tags. With acoustic tags, we can follow
the sharks in real time as they move

from wreck to wreck.

But this requires us to tag sharks in
the water and away from a feeding

So Tristan directs us to what he refers
to as a perfect wreck for sharks. It's

not exactly what I'm expecting.

Is that it?

That's where we're headed.

That's a wreck?

In a sense.

What is this thing?

Decommissioned radar tower.

Once used to relay radio signals, this
tower's legs extend 100 feet down to the

ocean floor.

And unlike a shipwreck, this vertical
reef created a shark habitat close to

surface where we can tag them.

However, if anything goes wrong out
here, we're utterly on our own.

Nobody comes out here to dive. We're in
the middle of nowhere.

These are going to be really wild
animals.

Stick close together, stay close to the
structure, don't go too deep.

Should we dive?

Yeah. Let's see what's down there.

We gear up and Tristan attaches the
acoustic tag to the end of a long spear

which he'll use to place it onto a
passing shark's dorsal fin.

As for me...

Don't worry. I still have my pokey
stick.

Here we go.

Visibility looks great.

Yeah, we must have at least 30, 40 feet.
Then it gets murky.

Look at this structure. This thing is
huge.

Yeah, it's like an underwater spider.

It's really eerie to see those legs just
going down into the murk.

This structure is abandoned, but look at
it. It's alive.

There's a bull shark. Look at that.

And another.

Whoa.

I cannot believe how many sharks are all
around us. I got to say, Tristan, I

never get used to this.

And I love this feeling.

knowing that they're around there.

And I'm guessing the Norlindo, wherever
she is, is also covered in life.

You can see why the sharks are hanging
out here. Look at the food supply.

We just got to keep ourselves off the
menu, guys.

So what's our strategy here to tag one
of these?

They're kind of on the periphery, but
they seem to be coming in and making

passes near the structure.

I'm going to hide next to this structure
and then pounce and take a tag shot.

Copy that. I'll watch your back.

While Yanis and I watch his six, Tristan
moves into position with the tag.

But we're so focused on tagging a bull
that we almost miss the arrival of an

even bigger and badder species coming
right for us.

Tristan, behind you! Tiger shark!

That's a tiger. It's huge.

While attempting to place a tracking tag
on a bull shark circling a

decommissioned radio tower in the
Florida Keys, Tristan, Yanis, and I are

surprised by an even deadlier predator.

Whoa, massive tiger shark.

I lost her. Where did she go?

Tiger sharks are bigger than bulls and
can grow up to 16 feet long.

Known for their powerful serrated teeth,
which can slice through the toughest of

prey, they've been nicknamed the garbage
can of the sea because they can and

will eat anything, including people.

I do not have eyes on her. She
disappeared into that murky water below.

I'm going to do another attempt. I've
got to get this tag out.

With dozens of bulls and a massive tiger
shark circling just a few feet below

us, Tristan leaves the safety of the
tower.

Okay, I'm taking my shark.

Here we go.

I got it! Nice.

Beauty! Nice work, Tristan.

Beautiful female bull shark.

All right, tag is in.

Mission accomplished.

Let's hope she's coming straight to the
Nerlindo.

Let's go back to the boat. Here we go.

Yep, heading back.

We quickly jump back aboard the boat so
we can send one of the research vessels

off to chase and track the acoustic
-tagged shark.

The next morning, Yanis gets an
important email.

The first of our camera tags has
surfaced and sent us GPS coordinates.

Time to see if our cinematographers have
found our missing tanker.

We've got the coordinates, so we know
where to head out. Okay, Johnny, we've

some coordinates for you. Okay, it's
north, 24 degrees, 55 .669.

West, 82 degrees, 15 .996.

How far is that from here?

Eight and a half miles to the northwest
of here. Okay, let's rock and roll. Come

on, let's find it.

We race off to find the first camera
tag.

As we close in on the coordinates, we
flow down to home in on the tiny device

floating in the vast ocean.

All right, how are we going to find this
thing?

So we've got to try and pick up the
radio transmitter. We can do it with

antenna that we have here.

You mean old TV antenna?

It's essentially the same thing. This
will detect that radio signal, and this

will turn it into an audible ping that
we can hear. So we'll turn it on.

If this thing works, I'm going to eat my
hat. This is set to a specific

frequency all that time.

Okay, let's do it.

Keep your eyes peeled. Here we go.

We follow the pings.

Straight on, Johnny. Nice and slow.

Carefully scanning the water for a red
speck.

You think we're close?

Yeah, we're getting really close.

We should be able to see it by now.

Everybody keep your eyes open, all sides
of the boat.

It's got to be right here.

Johnny, let's flow all the way down.

I see it. You got it? Right there, right
there. Wait, where, where, where?

Oh, there it is. There it is. Just up
starboard. Just up starboard. That's our

tag right there. Dude, nice work.

Tony, we find it.

Yes.

Woo.

Unbelievable. Nice one.

All right, camera number two, let's find
it.

We spend the better part of a day
getting emails and chasing cameras.

There you go, man.

All right, tag number two.

Oh, there it is. Yeah, there it is. Off
the bow, off the bow.

You see it? Yeah.

Got it.

Lucky number three.

That's it?

There it is, there it is. That's got to
be it, right?

Thankfully, the sea is calm.

Otherwise, we could be chasing these all
the way to Cuba.

With all of our footage in hand, we
catch up with the big boat to see what

got from both the camera tags and the
acoustically tagged shark from

All right, so let's talk data. So we
have a track here, and we're plotting a

point every 30 minutes where that shark
is. Okay. And here's what it looks like.

And you can see that the shark is kind
of following a contour.

Yeah. Essentially not really making any
moves left or right. It's kind of going

on a fairly straight path.

Yeah. And then it starts to mill around
a certain area. Look at that. It starts

to actually circle this.

Right. So it's kind of like maybe it
found a reef habitat that it's moving

around and hunting.

Or maybe it found a wreck. Or it could
have found a wreck.

Just like the way the sharks were
circling around the Munger T -Ball.

we have no idea what's in this.

No, with the acoustic tracker, we know
where the shark is, but we don't know

what it's seeing.

All right, so that gives us a place to
look.

Right. Now what about the camera tags?

We have camera footage.

Shot by sharks. Yep. Your shark camera
crew works perfectly.

Amazing. Let's see it.

First look at self -shot shark footage.

We're seeing what these animals do when
we're not around.

Okay, so we've got a shark here. Look at
that.

One of our sharks.

is going up to several other ball
sharks.

So there actually, you know, clearly is
sort of a group of them hanging around.

Oh, look at that.

Wow.

So much action. I can't believe how many
of them are just hanging out together.

Now to the million -dollar question, the
hunt for the Norlindo. Did you find

anything in this footage that may help
us with that?

So there is something I want you to see.

There is?

Yeah. Come on. Okay.

What did you find? Look in here. Okay.
It's murky.

Okay. Wait for it. It's coming up.

Okay.

Oh, right there.

That is wreckage. That is definitely
wreckage. Straight edge.

The question now is, is that a piece of
debris that fell off a ship, or is that

a wreck?

The only way we're going to find that
out is to go and take a look ourselves.

All right.

Let's dive, yeah?

Let's do it. Right now. Come on. Let's
do it. Go.

We take off for the target. Not only did
one of the camera tags capture

something that looks man -made, but it's
in the same vicinity the acoustically

tagged shark was circling, an area well
within our search zone for the Norlindo.

We may be zeroing in on the lost tanker.

Let's see what's down there.

We splash down and start heading for the
bottom, our eyes wide open.

Be careful because we know that there's
sharks around.

They brought us here.

Absolutely. I got my eyes open.

We don't have to wait long. The local
welcome wagon quickly swims up to greet

us.

We've got sharks.

One o 'clock.

Four o 'clock.

All o 'clock.

Don't panic. Just keep it in front of
you.

But it's the murk below that we're most
worried about.

where bull sharks may be lurking to
attack, and we wouldn't know until it

too late.

Need an example?

Got a big bull coming up here.

Man, that's a beast.

Swimming back down, though.

I don't see it anymore.

He's circling around.

Look out!

Whoa!

Whoa! Close, close, close.

Big bull shark coming in.

We're exploring a dive target more than
50 miles from Key West, Florida.

Everyone stay together. We just saw
three or four bull sharks on the

Hopefully these bulls have led us to the
wreck of the theme freighter Norlindo,

a missing tanker torpedoed by the Nazis
in 1942 that's still carrying up to a

quarter million gallons of oil in her
hold.

Pulling up on 50 feet. We should be near
the bottom.

I can't see anything. I don't know what.
Oh, wait, there it is. There's the

bottom right there. You see it?

Yeah, it's just sand here.

There must be something down here. Those
sharks must have been circling

something.

With a watchful eye on the sharks
circling overhead, we fan out and scour

bottom for traces of a wreck.

But there's a shadow up here.

There's something in front of us. Oh,
wow.

The wreck is hundreds of feet long,
which fits.

The Norlindo was a little over 250.

As we work our way around the wreck, we
find a gaping hole on the starboard side

of the vessel.

Guys, I found a way in.

But was this damage caused by a Nazi
torpedo or natural decay?

I'm sure this is World War II.

I don't want to run into a shark down in
these close quarters or find whatever's

left of Ben Gardner, so I leave the
wreck.

The side of the hull looks about right,
but we should be seeing a bridge and a

smokestack somewhere.

Yeah, I can't see anything like that.

This wreck's been down here a while, but
it's just too box -shaped to be the

Orlando, in my opinion.

I agree. This thing doesn't look like an
old steamer. It looks more like a barge

vessel of some kind. Yeah, I think it's
a barge.

We've still got a real mystery on our
hands here. I have no idea what this

is, but I think that's a Norlindo.

Whatever this wreck once was, it now
belongs to the sharks.

Whoa, watch your two.

Big bull shark.

And as uninvited guests...

It's now time for us to make our way to
the surface.

Unbelievable. Absolutely incredible.

Oh, what a wreck. The huge steel ship
down there, not the Norlindo, really

squared off some sort of industrial
barge, I think. Yeah, it looks like a

And I think the real headline is here,
this worked.

These sharks led us to a wreck.

Who needs sonar when you've got sharks?
That's right.

So we've got another wreck today to add
to the charts here.

And in terms of the Norlindo, we keep
looking. At some point, a shark's going

take us right through that. That's
right. More work to be done, and we're

case. And the sharks are on the case.
They are. All right. Awesome work, guys.

Amazing job.

Ah, incredible.

It's a huge wreck down there.

So cool.

We tend to think of World War II as
something that happened in Europe and on

-flung Pacific islands.

But a forgotten home front lies just off
the coast of Florida, where Nazi

submarines sank hundreds of ships, too
quietly claiming 6 ,000 American lives.

Eighty years later, the sea has
transformed death into life, as these

have bloomed into shark habitats.

vital hunting and breeding grounds that
are irreplaceable.

But the rusting hulk of the Norlindo,
with a quarter million gallons of fuel

still in its hull, poses a dire threat
to the species that call it home.

And until it's found, these fragile
shark populations are at risk of

the final victims of the forgotten front
from World War II in the Gulf of

Mexico.