Original subtitles

Tonight on the curse of oak island...

Rick: That's impressive.

Don't take a knife to a gunfight.

Wow. I was not expecting that.

Doesn't that line up with the old stone triangle?

It runs along the same line.

I would not have noticed that.

Aha, ha!

- Yeah, look at that. - Ian: What the hell is that?

That looks like a cannon, for god's sake.

Holy (bleep). I didn't expect to see this.

- Oh, geez. Look at that. - Whoa!

Narrator: There is an island in the north atlantic

where people have been looking for an incredible treasure

for more than 200 years.

So far, they have found a stone slab

with strange symbols carved into it,

mysterious fragments of human bone,

and a lead cross whose origin may stretch back

to the days of the knights templar.

To date, six men have died trying to solve the mystery.

And, according to legend,

one more will have to die

before the treasure can be found.

♪ ♪

charles: Here we go.

Narrator: A new day of investigation

to solve a 225-year-old mystery has begun on oak island.

What do you got?

108 to 128.

Terry: 108 to 128. Thank you.

- Narrator: And at the money pit area... - (horn honks)

- terry: Hi, rick. - Rick: Hey.

Rick lagina joins oak island historian

charles barkhouse and geologist terry matheson

to check on the progress being made

in locating a legendary treasure vault

more than 170 feet underground.

- Here we are at h5.5. - Yeah.

Terry: And as you can see, that's pretty meager recovery.

- Yeah. - But it's what we might expect because

it's going down through, uh, crushed, granite backfill.

Of course, our target is beneath.

Narrator: One week ago,

rick, his brother marty, and their partner craig tester

began a core-drilling operation in an attempt

to pinpoint the fabled treasure's location,

which is believed

to have fallen to a much greater depth

due to more than two centuries of digging by previous searchers

followed by massive cave-ins

caused by an elaborate system of booby-trapped flood tunnels.

This caisson will not end

until 175 or 190. Somewhere between that.

So, there's really no surprise here.

No, we're still above our target horizon.

We will get into a more interesting area

when we are beneath 175.

And until then,

it's just boring backfill.

Rick: We've now all come to the belief

that if there was a treasure,

that it has fallen to great depths.

So, what has the program

led you to believe about the possibilities

of that very thing happening?

Terry: Absolutely, there is an opening

in the middle of the money pit area.

A break in the bedrock, if you will,

around 220 or 215.

Narrator: It is now rick, marty and craig's hope

that by drilling into the bedrock

to depths below 200 feet,

they can pinpoint the vault inside a void

where it is believed to have come to rest.

If we were to consider

a larger dig, where would you put it?

Terry: I would put it over on the eastern side here

- where we get our deeper points. - Where do you go?

I agree.

- You agree with me? Super. - Yeah. Yeah, I do.

You get the rig back up and running.

- Terry: Rig back up and running. - And we'll,

- uh, we'll move on. - All right.

- See you later. - Thank you. Yep. - See you, guys.

- Talk to you later. - Rick: Take care.

Narrator: While drilling continues

at the money pit...

- Steve g.: Hey, guys. - Rick: Hey, everybody.

- Hello, crew. - Hey.

Hi there.

Narrator: Rick, marty,

and members of their team have gathered

for a videoconference with cartographer

erin helton in the war room.

Erin's made a revelation about what she deems the cross,

the importance of the cross to be.

I think you're gonna find it

highly, highly interesting

if not illuminating.

So, these, I believe, are your two anchors.

Narrator: One week ago, erin presented the team

with an incredible theory

based on a reported 14th century map of oak island

that was given to them in 2016

by the late author zena halpern.

The map, which zena believed had been made

by members of the knights templar,

noted various locations on the island,

including two labeled simply as "the anchors."

as an expert in mapmaking,

erin suspected that these so-called anchors

might actually be boulders left as markers on a master grid

leading to the location of the money pit treasure vault.

The coordinate is taking me here.

- Marty: Wow. - Jack: Wow. - Alex: That is a rock.

Narrator: When marty and members of the team

went to verify the gps coordinates

of the two locations,

they were amazed by what they found.

- Alex: I mean, that's pretty impressive. - Steve g.: Yeah.

Narrator: Although erin is still working to decipher

the so-called master grid that she thinks

will lead them to the treasure's location,

she believes that a find made

by the team three years ago at smith's cove

could be key to helping her complete the project:

The 700-year-old lead cross.

Rick: We'll let erin tell us what she deems

the importance of the cross to be.

So, erin, I'll turn it over to you.

Great.

Thank you so much for sending me

that 3d model of the lead cross.

I was successfully able

to print myself one.

Right there.

So, I've been able to demonstrate with this

and play with it a little bit.

I believe that the lead cross

is meant to be used in conjunction

with a square.

I also provided the 3d model

for you guys so you can follow along.

Rick: That's great.

So, erin, I'm gonna pass this off

to my brother, because he is uniquely qualified

to go from skeptic to believer.

- Marty: Not so sure about that characterization. - Okay.

But I am prepared to try.

All right. Challenge accepted.

So, we're actually going to end up using the square

to draw some particular angles.

We're going to be aligning the square,

or the ruler edge,

against all of the edges of the cross.

So, from the foot to an arm, arm to the head,

head to the other arm,

and then arm back to the feet.

Do your best to mark that head, as well. The square hole.

And now we're gonna complete our lines

as we drew them.

So, what you end up with

is a very symmetrical-looking

- diamond shape. - Marty: All right. Yep.

And we can take this one step further. Do you have

- my maps with the anchors marked? - Okay.

So, if you have the map in front of you and you have

your tracing paper,

you can actually align those two intersections

to your anchors.

Marty: Isn't the little mark I made

through the square of the cross,

the head, doesn't that

line up with the old stone triangle?

Yeah. It runs along the same line.

My proposed stone triangle location does. Yes.

Narrator: In June of 1897,

while exploring the island's southern shore,

treasure hunter captain john welling,

working under frederick blair,

discovered a formation of large stones in the shape

of a three-dimensional triangle.

Even more astonishing

was the fact that the apex pointed north,

directly toward the money pit.

Unfortunately,

during the massive excavations conducted

by robert dunfield in 1965

across the eastern half of oak island,

the stone triangle was destroyed,

and the location of the original treasure shaft

was hopelessly lost.

It is cool that this little device

will make 30s, 60s,

90s and 45-degree angles.

I could look at this thing

all day and all night long for a year,

and I would not have noticed that. (chuckles)

but is there something that this shape represents?

Erin: Uh, yes, actually.

Basically, my conclusion is

that this religious keepsake that looks

incredibly irregular might actually be

a protractor hiding in plain sight.

Gary: I always dream about finding

a key to a treasure chest,

and this might be the key to the treasure of oak island.

Erin: I do think this is absolutely the key

to when they were both constructing the money pit area

and perhaps if people were coming back to fetch it.

Rick: By people

looking at things outside the box,

that is really how this puzzle,

oak island, will get solved.

And she's certainly thinking outside the box.

(chuckles): So I'm somewhat vibrating, if you will,

because I think it's gonna be highly relevant

towards solving this incredible mystery/puzzle.

I know there's more that you're going to reveal.

As you proceed,

uh, you're going to continue to reference

- zena halpern's, uh, material, correct? - Erin: Yes.

I believe that she is in possession

of a couple other clues,

and I'm hoping to help, uh, glean light on that context

and, uh, help use them

to give you an "x marks the spot" at that point, as well.

If you put an "x" on the ground, we will get to the bottom of it.

- I guarantee you that. - Great.

Rick: Okay.

We look forward to the next time.

- Thanks, everybody, for participating. - Rick: Yep.

- Thank you. - Marty: See you later, then.

- Doug: Take care. - Rick: Buh-bye.

Narrator: Later that morning...

Rick: I'm interested to hear what you have

to say about this.

Narrator: Rick lagina welcomes geoscientist dr. Ian spooner

back to the island

to continue investigating a mysterious feature

in the southeastern corner of the triangle-shaped swamp.

So, what do you want

to find out today? I mean, we're gonna do probing.

- That's all I really understand. - Ian: Right.

I want to check out the anomaly area,

- which is right over there. - Rick: Yep.

Because the sonar I did showed the platform and a drop-off.

What I'm convinced of

is a real feature exists right here.

Narrator: Five weeks ago,

while conducting sonar scans

across this area with local diver tony sampson,

dr. Spooner detected what he believes

could be some kind of man-made structure.

Big drop-off. Right here.

- It's like a wall. - That's fantastic.

If we probe and we hit things,

that probe can tell us whether it's sand,

metal, wood, uh, rock.

It can tell us the depth, and then it can tell us

if it deviates from that nice, uniform basin.

And if it does, then it's probably been manipulated.

Yup. I think there's still secrets in here,

and there's still things to know about the swamp.

- Absolutely. That's why I study these things. - Yeah.

- This has thrown a few curveballs at me. - Curveballs?

Yeah. And so, do I expect to see more curveballs?

Well, I wouldn't have said this a year ago, but yeah, I do.

- Let-let's go find some. - Let's go, let-let's find some curveballs.

Let's find some curveballs.

What we're looking for is any reference

to this structure, and dr. Spooner now has

some sense of

where to look, to what depths, in what areas, and

what we hope to find.

I think it was

- somewhere in there. - Right in here?

How about I just start trying here?

Sure.

Two meters deep, or more.

It just keeps on going.

We're hitting muck.

I'll move it over.

Well, it's-it's three meters deep right there.

Holy (bleep).

- (metallic tapping) - what's this?

- (metallic tapping) - ian: Holy (bleep).

- What's this? - Narrator: While investigating

the southeast corner

of the mysterious triangle-shaped swamp...

- Do you hear that? - Yeah.

- There's rock here. - (tapping)

- that could be it. - Yeah.

Rick lagina and geoscientist

dr. Ian spooner have just discovered

a flat stone feature below the brackish water and muck.

Let's try here.

- (tapping) - rock.

- Rock. And it's flat. - Mm-hmm.

It's all exactly the same depth.

- Mm-hmm. - This is not normal.

- Got to keep going down that way. - Okay.

Narrator: Since this rock feature

appears to be much larger than dr. Spooner first thought,

could it be connected to, or be part of,

the massive stone-paved feature

that the team uncovered in the swamp last year,

and which he scientifically dated to as early as 1200 ad?

I'm gonna just, um, try the probe right here.

Okay.

(tapping)

so, there's stone right here.

Ah.

- (tapping) - stone.

I'm just gonna put a stake right in there.

(grunts)

so, maybe we'll just try right in here.

Okay.

(grunts)

- oh, geez. Look at that. - Whoa.

- There's a stone. - (tapping)

(laughing): Three meters deep right here.

A three-meter, give or take, drop-off.

There is. I mean, we both saw it.

So, it's stone right up to there?

Right... Right here. One foot over.

It is my belief, at least my initial belief,

that it is a road or a pathway or a platform.

So, what is it doing two or three feet down,

in a swamp, on oak island?

But that's what makes this structure

incredibly interesting... The "why" of it.

- So, it's right here. - Yeah.

It's almost a perfect line,

because there's a definite

side there and a definite side right there.

It's got to be rock to the bottom.

But it also drops off to three meters on the sides,

so this was built with purpose.

It's huge. (laughs)

- right. - I think

there's gonna be an abundance of artifacts here.

Too many people were doing too much work,

and maybe transporting

something from the body of the swamp to the upland.

But if this was used as a path,

you're pointing, generally, at the lot 15's feature.

Right. Well, it'll be interesting to see what we find

- under that rock. - Yes.

Narrator: Could it be

that rick lagina's suspicion is correct?

Have he and dr. Spooner discovered a hidden wharf

or platform used long ago

to transport cargo from the swamp

to the structure located earlier this year on lot 15?

Well, this is historically important.

Narrator: Five weeks ago, the team,

led by archaeologist david macinnes,

a direct descendant of legendary

oak island treasure hunter daniel mcginnis,

began investigating what they believe

to be a 16th century pine tar kiln,

and which may be connected

to the construction of the original money pit.

Is it possible that the rock structure

rick and dr. Spooner have located in the swamp could

also be linked to that operation?

If so, could it also offer new clues

about the 200-foot-long anomaly

that the team detected two years ago with seismic scanning,

buried more than 50 feet deep in the middle of the swamp?

One bearing the same size and shape of a large sailing vessel?

Whatever feature is here, if it was built,

it's quite substantial. They would have had

to pour enormous resources into this.

Yup. So that means it's got to be excavated.

Yes. Exactly.

Any discovery in the eastern corner of the swamp

is a big deal, right?

It's-it's been unexplored

by any of the searchers that we know of.

So, whatever you find there

could be highly relative to perhaps understanding

the-the money pit, because it's in very close proximity.

It's possible that it'll give us some more information

to understand the swamp itself

or its construction or its purpose.

But that's-that's... That's remains to be seen.

(line rings)

- marty: Hello. - Rick: Hey.

Dr. Spooner and I have been out in the swamp,

and I'm gonna let him tell you what he believes he found.

So, what we found was

a 20-foot-wide, 70-foot-long...

The only way I can describe it is, it's like a road

across the swamp.

It kind of connects from land to the beach.

It's the biggest feature I've seen.

Rick: Because we...

We didn't dig. It's not metal-detectable.

It would not have shown up on an em target,

because it's not metal.

It's got about 15 centimeters of muck on top of it,

which means that it probably was built back in time.

I mean, it just gives more, I think, more impetus to...

To doing some excavation.

- Okay. - Okeydoke.

- See ya. Bye-bye. - Bye.

Rick: I do believe

the swamp is a keeper of secrets.

Ian: Yeah.

Narrator: The following morning,

at the oak island interpretive centre...

Tony: How you doing, guys?

We've got something here to show you.

Narrator: Brothers rick and marty lagina,

along with marty's son alex,

are joined by dr. Ian spooner

and professional diver tony sampson

to discuss a plan to further investigate

the mysterious rock feature in the swamp.

However, because they must wait for the necessary permits

to drain the area and excavate, this investigation will focus

on the surrounding ocean waters.

- So, what we're looking at here is around oak island. - Marty: Yeah.

And what ian's got there is also a map

of what it would have looked like

going back to 1600 ad.

So the idea here is to go back to these time periods.

1600 ad. We're probably gonna go back to 1200 as well,

- thinking of the paved area... - Good. Mm-hmm.

And reconstruct what the shoreline was at that time.

It gets back to understanding, fundamentally, the swamp.

It lends a new perspective on what could have been possible

- back then. - Mm-hmm.

Rick: Oh, wow.

But that wondering will be, I think, a little bit solved

by us getting out and doing the sonar work.

Perfect.

Some of the things that we found, I think,

seem to suggest that the swamp was connected to the ocean.

So the sonar data that we're getting

is to extend that knowledge.

Narrator: It is dr. Spooner's hope that if he can find evidence

of the mysterious structure protruding out into the ocean,

he may be able to determine exactly what it is

and what its purpose may have been.

So, what we want to do is look at the swamp,

- which is right here. - Mm-hmm.

This is a projection right here of a 1600 shoreline.

1200 would likely be even further out.

Because where it's eroded...

And we can see that it's eroded right there.

You can see what's left behind.

It's probably deeper than it was.

If we project a shoreline out in the past,

then the swamp becomes a different, um...

It has different utility. Different purpose.

- Okay. - If I reconstruct

what it was like at 1600 and 1200,

what the island was like,

I know the oak island we will see will be more complex

than the one we see now.

Marty: Yes, it could be all different. Yeah.

- Mm-hmm. - So we've got to go out and do sonar

to modify the map.

If you know where the shore was back then,

you know, potentially, where artifacts might be.

Rick: The value of doing scans around the island is simply

that we may get some information regarding the, the swamp.

As we know, the oceans have come up about a foot a century.

Is there evidence of workings out there

that we currently are unfamiliar with?

We may get an "aha" moment out of it.

Well, look, I-I-I can tell you this, if you pardon the pun.

- I'm aboard. - (laughter)

ian: And all that we've got to do is stay focused on

the data as it comes rolling in.

Marty: Take the young guy.

Tell me where and when, and I'll be there.

Okay. Tomorrow morning. (chuckles)

make it so. Get on the boat.

- Let's get some results. - Ian: We will go. Okay.

- Marty: Perfect. - Tony: Fantastic.

- See you in the morning, alex. - Marty: Thank you.

Ry: Looks like the guys are on the way.

Steve g.: Yeah.

Gary: I'm looking forward to this.

Narrator: Following his meeting

at the interpretive centre...

All right, chaps.

That's impressive.

Don't take a knife to a gunfight.

Rick lagina, along with oak island historian doug crowell,

metal detection expert gary drayton,

and surveyor steve guptill,

arrive at lot 15,

located near the eastern edge of the swamp.

So, this is all about the ringbolts, right?

Gary: Exactly.

Like so many things on oak island,

you've heard about the 90 foot stone,

these ringbolts,

- and no one's ever seen 'em. - No.

For a long time.

Well, that ends today,

- 'cause we are gonna find 'em. - (chuckling)

can't ask for more than that.

Rick: You've come up with an idea

- exactly where to look? - Steve g.: Mm-hmm.

Doug and I took one of dan's surveys,

and we calculated the scale and overlaid it.

So, we're gonna start at the coordinates.

We're gonna hope it's there.

And if it's not, we're gonna work slowly

northwest with gary.

Narrator: After referencing a survey map of the area

between the swamp and lot 15

made by dan blankenship back in the late 1960s,

rick and the team are hoping to find evidence of a discovery

reported to dan by rival treasure hunter fred nolan

that may be directly connected

to man-made workings in the swamp.

The assumption we're making is

that there should be a substantial boulder there

for these things to be anchored into.

So that's what the ringbolts are in. They're in boulders.

- Yeah. - Rick: Okeydoke.

- Let's go find something. - Okay, mate.

Narrator: While investigating his oak island property in 1969,

the late fred nolan claimed to have discovered

several iron ringbolts embedded in boulders

near the eastern bank of the swamp.

Shortly after, he was stunned to recover

numerous pieces of a large sailing vessel,

including the scuppers and part of a mast,

within the swamp itself.

These finds convinced fred that the ringbolts

may have been used to dock a treasure galleon,

and that the swamp was artificially created

in order to hide it.

Rick: The long-sought-after ringbolts is important because

fred used the ringbolts as his...

One of his major reference lines.

And it directed him to all kinds of things.

That's what we're hoping for.

The one puzzle piece that will fit,

and we'll go, "wow. That's what that means."

narrator: Although fred removed the ringbolts that he discovered,

his son tom nolan has confided to rick

that he believes one or more may still exist in the area.

So, let's start here.

The radius that I've calculated is gonna loop out.

- Gary: Okay. - Okay? So I'll get out of your way.

- I'm gonna go to the next location. - Okay.

(device humming)

- rick: Anything? - Gary: No.

(murmuring)

steve g.: There we go. Take a look at this.

Doug: This one here looks big enough to be an anchor rock.

Steve g.: Yeah.

What are you guys up to over there?

We have some pretty substantial boulders

over here that we need to be checked.

Yeah, we'll check 'em with the ctx.

This is what we should be looking for, a lot of boulders.

Just seems like the rocks that should have a ringbolt in 'em.

(device humming)

- yeah, these two are really promising. - (device chimes)

oh. And there's a target here.

- (beeping) - it's iron.

Eight-or nine-inch reading.

- Yeah? Dig? - Yeah, please.

Well, there's something there, gary.

Do it slow.

- There, gary, it should be out. - All right, mate.

I'll check it and see.

Steve g.: Is it out?

Wow. I was not expecting that.

You know what this is?

It's a, definitely, in my opinion, part of an old

cast-iron stove or a cooking pot.

I can see now... Look, you see that flat piece?

That was what you grabbed hold of.

And this would have fit along the front

of an old kind of like a pot-belly stove.

This is an old piece of iron, mate.

When fred moved the stone just up the hill here from us,

he found parts of an old cast-iron stove under it.

He called it a ship's stove.

I could see this off a ship. Especially being here

on the edge of the swamp. I really can.

Narrator: A piece of a ship's stove?

In 1981, while surveying his property,

fred nolan discovered six large boulders

that make up the megalithic formation

now known as nolan's cross.

Believing that the boulders might be covering

buried treasure caches,

fred dug beneath several of them.

Although he found no treasure,

he did discover fragments of an iron stove that,

based on further research, were believed to have come

from a 17th century galleon ship.

If rick and the team can verify

that this iron fragment also came

from a large sailing vessel, it could be a valuable clue

that might help identify who was behind

the oak island mystery.

Gary: Nice, cool find.

But just like any interesting piece of iron we find,

we know the guy who will tell us exactly how old it is

and where it comes from: Carmen legge.

Rick: He'll certainly have an opinion.

It's really cool 'cause we went looking for one part

of the mystery, the ringbolts,

and we might have found a fragment of another part

- of the mystery. - Makes you wonder what else is in here, right?

There could well be some more

interesting artifacts in this area.

Rick: Okay, let's find it.

Narrator: As a new day begins...

Where are we right-right now? This hole.

Well, we're not finished yet. They got a ways to go, so...

And as the team continues their drilling operation

in the money pit area...

Some 60 miles north of oak island,

in centreville, nova scotia...

- Jack: Hey, carmen. - Carmen: Well, looky here.

Alex lagina, along with his cousin peter fornetti

and jack begley, arrive at northville farm.

They've arranged for blacksmithing expert

carmen legge to inspect the iron fragment

the team found one day ago on lot 15.

What you got today?

All right, this was actually found

right at the edge of the swamp.

That's what we were thinking, too. Stove part.

- It's the proper thickness, too. - Mm-hmm.

Where would you find something like that?

For warmth?

What-what time would that have been in use?

- Early 1700s? - Yeah.

- Wow. (chuckles) - yeah.

Narrator: A ship's stove, dating to the early 1700s?

Could it be more evidence of someone sailing to oak island

more than three centuries ago

to hide something of great value?

Well, I think we should get back out there and see

if we can find more of this.

Well, it's been a great visit, as always.

- Very good. - We know a lot more than we came here with.

Jack: Thanks again, carmen.

Alex: Thank you.

We'll see you again soon.

Narrator: Later that day...

Alex: Looking forward to a day on the water.

Couldn't have picked a better day for it.

Narrator: After returning to oak island,

alex lagina joins dr. Ian spooner,

along with tony sampson, at the dock

belonging to fred nolan's son tom

on the northern shore of oak island.

They will be making their way to the swamp

in order to conduct sonar scans along the coastline

in search of more evidence of the massive rock structure

found two days ago by dr. Spooner and rick lagina.

As they navigate around the island to the south shore,

they will also be running scans to look for

any other important clues that may be helpful in solving

the 225-year-old mystery.

- So what's the plan? - What we're trying to do is trying to find

old shorelines, paleo shorelines.

You see this brown line around oak island here,

that's dropping sea level down to what we thought

- existed in 1600. - Mm-hmm.

If we're thinking that the island was used back then,

if there was a wharf or anything like that,

it would be at that shoreline,

not where the shoreline of today is.

Exactly. And so, you know, whether it's looking

for artifacts, whether it's looking for features,

we can go back, reconstruct that shoreline,

and look for features.

What we're gonna be doing today is we're gonna be

going around smith's cove, around isaac's point here,

and then into the south shore cove area by the swamp.

So that's where we're gonna do some scanning in there.

Well, that's great, guys. Let's, uh, let's get out there.

- Ian: Yeah. - Let's check this stuff out.

Tony: Come on board, chaps.

I'll start her up, ian.

(engine starts)

we're all good.

Narrator: In order to conduct

a comprehensive scan of the island's coastline,

dr. Spooner has equipped tony's boat

with three different sonar devices:

A down-imaging scanner

focusing on the seabed directly beneath the boat,

a side-imaging scanner focusing on either side of the boat,

and, finally, a low-frequency scanner

capable of penetrating the thick silt on the ocean floor

where artifacts or valuable clues could be buried.

Tony: Target area, ian.

- Ian: Okay. - We'll move closer to the shore.

- We'll be about three meters' depth, ian. - Yep.

So, we should watch this carefully.

Mm-hmm.

Alex: Nothing so far.

Pretty shallow, though.

- If we can just kind of go out a little bit further, tony. - Tony: Okay.

Ian: That's good. That's good.

Well, let's see what we can find.

Tony: You got any silt here, buddy? Or...

Uh, yeah.

- Alex: I don't see anything on this. - Yeah, I know. It's featureless.

What about that right there?

Ian: That is...

What the hell is that? Yes.

So, that... yeah, what the hell is that?

- Tony: That's cool. - I've never seen anything like that.

It's sticking straight out.

Alex: Yeah, it's flat and then it's like a tower.

Yeah, but that looks like a ship, for god's sake.

Alex: Wow.

Tony: Nothing sticks up like that for no reason at all, huh?

Out of the silt.

Tony: In the middle of nowhere.

And we're... look where we are. Right off the boulderless beach.

Narrator: Off the northern shoreline of oak island,

alex lagina, dr. Ian spooner

and tony sampson have made what could be an important discovery.

Ian: This place was used by a lot of people.

- Yeah. - So, if there was a boat that either sunk or was sunk,

there should be a fair bit of that activity around.

Yeah. Whoever came here, they didn't come in one ship.

-You know? They came in a, a fleet. -(chuckles) uh-huh.

And, you know, some of it's still

on the bottom now, waiting to be found.

Narrator: A possible shipwreck?

Just off the coast of oak island?

Although the waters of mahone bay that surround oak island

are known to have been a major thruway for sailing vessels

dating back more than three centuries,

if this is indeed a shipwreck, could it be related in some way

to the 225-year-old treasure mystery?

Now, this position has always interested me

because it's a shallow rock ledge just below the surface.

There's a reason there's 25,000 shipwrecks around this coast.

It's because of these tricky areas.

And so, that would have been an area

where a ship coming into here could have wrecked.

Ian: So, to have it sticking up,

there's only a few things that can do that.

- And you just can't get them in the middle of a basin. - Tony: No.

At 12 meters. It's almost impossible.

So, is it ballast? Is it... What is it?

Alex: Yeah.

I mean, I'd love to come back and do a jump

on that, alex. What do you think?

Yeah. If we can find it, let's dive it.

Sounds great to me, mate.

Alex: Right as we're passing boulderless beach,

we both see this really weird kind of spike up

and a plateau and another spike down.

Like nothing we've seen around the island, ever.

It could be the remnants of a ship.

We just don't know, but that's why we need

to investigate further.

We're moving more towards the swamp area now.

So, that's... that's what you should be getting...

- Alex: That's what we're seeing. Yep. - Ian: Right.

And we can see it beautifully here.

So, what's kind of very interesting

I-in terms of what we're doing, is we're picking up these points

where it's highly erosive.

We see a lot of boulders. Huge boulders.

And we can, I think, project land a little further out.

Tony: Well, this is interesting,

'cause we're going back 400 years.

Chances are this was the beach on oak island.

Alex: I'm seeing a lot of rocks down here.

- Ian: Yeah. - And I'm seeing

maybe something even larger just on the,

kind of perimeter of what we're scanning right now.

Yeah, it's right... we're coming right up to it right there.

There's something very... There's something here.

Alex: What's that?

- I have no idea. - Hey, tony?

- Can you see this? - Tony: Holy smoke... okay.

What I'll do is I'll come back 20 meters on that side.

- Okay. You're on the line now, guys. - All right.

Right, we can see it. We're coming up on the structure now.

It should be right about now.

-There. -Alex: Yep. See that line right there?

Ian: Boom. Like, it looks like a line.

Like a line that we're following here. Edge of the swamp.

- Parallel to the old shore. - Ian: Yeah.

Ian: This might be evidence

of a human-made structure.

The remnants of an old wharf.

Something like that.

Narrator: A wharf-like structure?

Just off the south shore, right near the oak island swamp?

Could it be connected to the mysteriously

uniform feature rick lagina and dr. Spooner found

just two days ago?

Ian: What I can do, I think, is really refine this map.

You got to... you probably have to dive it.

- It's worth a look, up close. - Alex: Yeah.

This feature on the south side of the island

is a square-shaped anomaly that we think might be, uh,

the remnants of an old wharf.

This lines up with what the island used to look like

before it was eroded.

So, if you're going to build a wharf,

that's where and why you would have built it.

Ian: So, we got everything. I think we've got all the lines.

W-we've got enough data.

Alex: Well, it's been a good day, guys.

We-we know a lot more than when we set out.

So, let's, uh, let's head back to the dock

and tell the guys what we learned.

Tony: Fantastic. Will do.

Alex: I love it.

After completing their sonar scanning operation

off the north and south shores of oak island...

- Alex: Hey, guys. - Tony: Hey, guys. How you doing?

- Good. How are you? - Good.

Alex lagina and professional diver tony sampson

join rick, marty and other members of the team

at the interpretive centre to share their report.

- So, did you guys go swimming? - (laughter)

no. No, we didn't.

We, uh, we and dr. Spooner took the boat out.

We were trying to do a bathymetric survey

around the island to say, okay, where has it eroded

and where has it deposited over the last couple hundred years?

The goal is to put a map together

of what the island would've looked like in the year 1600

- and-and possibly also in the year 1200. Right. - 1200. Yeah.

- Did you get good data? - Alex: Uh, we did.

Um, we have a, we have a map that we could

kind of show him where we went?

- Any surprises? - Yeah, there were.

- Yeah. Oh, yeah. - (laughter)

- oh, really? - Alex: So,

- everything was coming along. - Yeah.

Alex: And then... Do you want to tell him what happened?

Well, that was... It was the weirdest thing.

- You've got a flat, sandy bottom... - Mm-hmm.

And then all of a sudden there's structure

- and then there's an anomaly. - Yeah.

So, maybe it's part of a shipwreck.

- Wow. - Jack: Oh, wow.

Alex: We do know

that the surrounding area is flat.

- How deep is it? - Oh, she's 30 feet.

- I see. - Jack: Interesting.

Tony: Yeah.

- Marty: Is that it? - Alex: Well, no.

Uh, just coming off the... The swamp

by where the stone triangle

used to be, you get lots of evidence

that that has been eroded.

The other thing we found there was a-a square-like structure

just-just off there, as well.

Off the southern shore?

- Yeah. - Rick: What'd it look like?

Tony: So, it was probably about

eight feet by eight feet, rick.

But it-it definitely had a linear feature to it, as well.

Well, it's a square-shaped something.

Doug: In the old aerial photos,

there's what looks like...

It resembles an old wharf.

It looks like a very rectangular pattern

that runs out from the, from the point.

Tony: If we find those,

um, like, small stones, like, it was a cribbed wharf,

they may even be part of a timber structure

- down there as well. - Wow.

Rick: I-I think we all know that there are

man-made structures in the swamp.

But, you know, where are they built?

You know, do they go out into the, uh, intertidal zone?

Whatever results are-are derived from this are good results.

It's good data.

The bottom line is, dr. Spooner ought to be able

to give us a picture of this island,

of what it looked like in 1600 and what it looked like in 1200?

- From this data? - From-from the details we got, yeah, for sure.

Well, I'm keenly interested in that.

Well, it sounds like it's worth a dive.

- Oh, for god's sake, yeah. - Yeah.

Marty: Well, as rick always says, then,

"eyes and fins on the ground."

- (laughter) - there you go.

- You have one really giant mystery to go figure out. - Tony: Yes.

And you got your-your big eight-by-eight target there.

And so, you know, go-go do it.

You know, it's like diving in the money pit, right?

The prime directive is stay safe.

- Excellent. Will do. - All right.

Let's get out of here. Let's call it a day.

- Rick: Okay. I think we're done. - Tony: Excellent.

Narrator: For rick, marty

and the devoted members of their team,

a year that began with great challenges

that they never could have anticipated

continues to yield new discoveries

both on and around the island

that may soon prove the 225-year-old mystery

is more complex and profound than anyone ever knew.

Does the triangle-shaped swamp hold the key

to unlocking the ultimate answers?

Or could it be, just like the money pit,

only one of oak island's incredible enigmas

that will hold onto its secrets

until a deadly curse is finally satisfied?

Next time on the curse of oak island...

Gary: Here we go.

What does that remind you of?

It looks like an enormous key.

Doug: I saw a rock mound that doesn't look natural to me.

- What is this thing? - I ain't got the foggiest.

It's like some crazy irving work.

It's a man-made structure.

Tony: Let's go find some treasure.

As soon as you got close to the bottom,

it was that whole area was live.

- (exhales) - wow.

Captioning provided by a+e networks