[Narrator] Incredible UAP videos
recorded over open ocean.
[Anna Luna] Every individual that has seen that footage
cannot explain what that is.
[Narrator] Strange craft seen rising out of the sea.
[Giorgio Tsoukalos] This is technology that
nobody really has.
[Narrator] And mysterious formations on the ocean floor.
It looks like a flat, oval-shaped platform.
[Narrator] Is it possible that, hidden within Earth's
vast underwater realm, is an alien presence?
[David Childress] The anomalous activity
would seem to indicate that there is some kind of
underwater UFO base.
♪ ♪
[Narrator reads on-screen text]
U.S. military drones
patrolling shipping lanes off the coast of Yemen
detect a small, unidentified object
flying rapidly over the water.
Believing the mysterious craft is hostile,
they fire a missile to destroy it.
But when the warhead impacts the object,
something unexpected occurs.
[Richard Dolan] On the video, you see a Hellfire missile
hitting a fast-moving object, but nothing happens.
You do see something coming off of the impact.
But by and large, that object appears to have been
fundamentally undamaged.
That is an extraordinary event.
[Tsoukalos] The footage is quite amazing
because three smaller pieces fall off the object.
And then, these three smaller pieces,
they don't just fly off in different directions.
They stick around and follow the larger piece.
And then, inexplicably, the video cuts.
Military personnel thought this was serious enough
that they needed to bring this to the attention
of members of Congress in a classified briefing.
[Narrator] One member of Congress
who learned about the sensational video
was Representative Eric Burlison
of Missouri,
and on September 9th, 2025,
he presented it during a congressional hearing on UAPs.
[Eric Burlison] This video was talked about widely
amongst the intelligence community for months.
I'm told there's a longer version of that video
where this object traveled for some five minutes.
I felt like the American people deserve
to judge for themselves what they see in that video
and what-what the content is.
We actually put in a request to the Department of Defense
to get access to some of this footage,
and we were denied access.
What I will say is that
every single individual of the military
that has seen that footage cannot explain what that is.
What we are being told and what we have seen evidence of
is that this tech is not any tech
that any government has currently.
[Narrator] Aerospace engineer Dr. Travis Taylor,
a former member of the U.S. government's UAP task force,
was part of a team assigned to analyze the sensational footage.
[Taylor] The original analysis done of this video
was that this was a fast-moving
dirigible type vehicle
because it reacts in the way that a balloon reacts
when you hit it with a missile.
The problem is that it was moving too fast to be a balloon,
but there was not enough data from this video,
from the radar tracks,
from any other information to tell us
exactly what this object was.
[Tsoukalos] The fact that this Hellfire missile
essentially just bounces off the object--
this is technology that nobody really has.
Or the question then is,
who has it? Is it us?
Is it the Russians? Or is it E.T.?
[Narrator] Could it be that the unknown object
was not destroyed by the Hellfire missile
because it represents technology from another world?
For UFO researchers,
what makes the footage even more compelling...
[pilot] My gosh!
[Narrator] ...is that it is just the latest
of dozens of UAP videos
captured by the U.S. military...
[pilot] Look at that thing, dude.
[Narrator] that show strange craft flying
over Earth's oceans.
[Burlison] We've got
multitude of witnesses that have come forward,
and there are many reports of unidentified objects
that are in the ocean, some of which are
traveling at tremendous speeds
and depths.
[Pope] The focus of this mystery
is now shifting from the skies to the oceans.
For example, when
the U.S. government
set up the UAP task force, it actually sat,
in terms of command and control, under the U.S. Navy.
And when the initial media reports broke
in The New York Times about the existence
of the AATIP Program,
it was the U.S. Navy
who put up the spokespeople for this.
So again, Navy, Navy, Navy.
[Dolan] We're seeing a bit of a breakdown of the old system
of secrecy that has been in place for many decades.
And as a result of that, I think we're-we're seeing more
individuals from the military, Navy, and other services
as well, who are feeling a little more
emboldened now to come forward with what they know,
in terms of the UAP mystery.
[Narrator] Retired U.S. Navy Rear Admiral Tim Gallaudet
has experienced several of these incidents firsthand.
[Tim Gallaudet] We know that UAP are occurring
in the ocean, and there's been many observations.
In 2015, when I had sailors under my command
on the USS Theodore Roosevelt
off the U.S. east coast,
and the aircraft carrier was conducting flight operations.
The pilots were seeing multiple instances of UAPs.
And they were having near midair collisions.
And I learned about this from an email I received
on the Navy's secret network
that said, in all capital letters in the subject line,
"Urgent safety of flight issue,"
and attached was a video of the now famous
"Go Fast" video, which has been declassified.
[Gallaudet] That convinced me that that wasn't our technology
or adversary technology because I had been read into
all the threat capabilities.
I knew, convincingly, that that was something
that was not of this world.
[Narrator] Not only have UAPs been witnessed above the ocean,
but some have even been seen going in and out of the water.
[man] It's gonna go into the water.
[Narrator] Known as unidentified submerged objects,
or USOs, these mysterious craft display
capabilities that have left mainstream physicists baffled.
[Taylor] There are many references of UAPs
flying into and out of the water.
Now, to my knowledge, the understanding of physics
is not at a level that would enable us
to build a device that could fly
not just in the air
but through water.
It's theoretically possible, but we have absolutely no idea
how we would engineer it and build it, and,
to my knowledge, nobody on this planet
has that capability
and that understanding of-of technology.
[Jeremy Corbell] We have heard about UFOs operating
in a way that they call transmedium,
which is without the friction and resistance
of changing mediums from space to air to sea like that.
Zero disturbance in the atmosphere.
[Gallaudet] There is a whole lot of ocean
we know nothing about, and therefore, it's very likely
that UAP are occurring and operating
in that domain without any of our knowledge.
[Narrator] While the videos released in recent years
by the U.S. military are highly intriguing,
sightings of USOs date back decades.
According to ancient astronaut theorists,
encounters with transmedium craft
have occurred so frequently throughout history
that Earth's oceans might even be hiding secret alien bases.
And they believe one such base
may be located just off the coast
of Southern California.
[Narrator reads on-screen text]
A U.S. Customs and Border Protection aircraft
is conducting a routine patrol above a regional airport
when the plane's thermal camera
captures what appears to be a large metallic object
flying at a high velocity.
As the unidentified object continued out over the ocean,
it began to perform maneuvers that exceed the capabilities
of any man-made aircraft.
[Pope] At one point, it descends into the ocean,
and then a few moments later emerges
but, apparently, has split in two.
We don't have that kind of technology.
[Narrator] The strange object was recorded for several minutes
before it entered the water and disappeared.
[Tsoukalos] The Aguadilla footage
is unlike anything we have
because not only is there not a splash zone
as the object enters the water,
but there's also no loss in velocity.
Now, any physical object that's known to man today
entering a body of water, there's an automatic loss
of velocity and there's a splash zone.
That illustrates some type of technology
that's either something that
our military, for example,
is working on,
or-- I'm sorry-- it's extraterrestrial.
[Narrator] Is it possible that the USO
shot off the coast of Puerto Rico was of alien origin?
Ancient astronaut theorists suggest the answer might lie
hidden in the depths where the strange craft disappeared,
in a mysterious region known as the Puerto Rico Trench.
[Dolan] The Puerto Rico Trench goes down to roughly
about 30,000 feet.
And that is a region of a lot of USO activity
and a lot of aerial UFO activity.
You've got cases going back to the 1960s
of U.S. military vessels
tracking an object under the water,
and it goes into the Puerto Rico Trench
and just disappears.
[Narrator] Many researchers suggest that,
if extraterrestrials really have come to Earth,
the deepest parts of the ocean-- like the Puerto Rico Trench--
would offer the perfect hiding place.
We have mapped the moon and Mars
to a higher resolution than our own seafloor.
And in fact, there's huge areas of the ocean
that we know nothing about.
[Childress] Our oceans are so vast and mysterious.
There could be all kinds of stuff deep within them.
The deepest part of our oceans are about seven miles deep,
and you need special submarines to go that deep.
So now, with all of these stories of underwater UFOs,
you have to wonder if
there is some kind of underwater alien base,
or several of them around our planet.
[Narrator] Is it possible that extraterrestrial bases
are hidden deep in our oceans?
In 2011,
a Swedish deep-sea exploration company called Ocean X Team
was exploring the Baltic Sea
when they made an unexpected discovery.
Using sonar imaging,
the team captured what appeared to be
a large, man-made structure on the floor of the ocean,
almost 200 feet wide.
[Pope] They're about 300 feet down,
and they discover, on the seabed, this anomaly.
And it's been dubbed the Baltic Sea anomaly.
It's a raised structure of some sort
with some curves, obviously, around the edges,
but some fairly sharp right angles, too.
[Taylor] Underwater drones have been
sent down to try and get pictures
and reference what this is.
And what's really interesting to me
is that, when these underwater submersible
sensor platforms get close enough to get any useful data,
there's some kind of loss of signal.
It's like there's an intelligence that can jam
the useful information.
So what is this dome-shaped object at the bottom there?
[Narrator] Could the mysterious structure
in the Baltic Sea have been created
by extraterrestrials operating in Earth's oceans?
Ancient astronaut theorists say yes,
and suggest even more compelling evidence
can be found off the west coast of the United States.
[Narrator reads on-screen text]
New satellite images taken by Google Earth
capture an unusual anomaly on the seabed
six miles off the coast of Malibu.
The curious formation is in the Santa Monica Basin,
where residents have been reporting
both UFOs and USOs for decades.
[Pope] Now, I've seen a lot of these so-called anomalies,
and sometimes it's just, obviously, a geological shape.
But not this one.
For example, there's a part of it which looks like
a flat, oval-shaped platform of some sort.
But under that, there are
what I can only describe as columns, pillars.
What is this?
Is it some kind of building?
Some structure built by an ancient civilization?
Or perhaps by extraterrestrials?
I mean, this is about 3,000 feet down.
If extraterrestrials want to establish bases on Earth,
this is the place to do it. You can't just put divers down.
It's a very difficult and dangerous environment.
[Narrator] Speculation that the formation now known as
the Malibu anomaly
could be an underwater alien base only grew stronger
when, in April 2025,
it was suddenly, and mysteriously,
blurred out on Google Earth.
[Pope] Now, a lot of locations are blurred.
Sometimes, it's because there are military facilities nearby
that, for reasons of national security,
you don't want that out there so that adversaries can see it.
And that might be part of it. But
you wonder. It was out there.
Now it's blurred. Why?
[Narrator] In the very same area
as the Malibu anomaly,
unusual phenomena have been reported for decades.
[Pope] One really interesting report was July 8th, 1947,
which by coincidence, or maybe not, was the very day
that the Roswell Daily Record reported the infamous UFO crash.
Three Army veterans
witnessed six flying discs
at huge speed passing over Avalon
on Catalina Island before disappearing off towards Malibu.
The thing you have with some of these USO cases
is this is not an isolated type of an observation. Why?
Is there a base down there?
You really have to ask yourself what is going on there.
[Narrator] Could there be a connection
between the Malibu anomaly
and the many USO sightings that have been reported
off the coast of Southern California?
Ancient astronaut theorists say yes,
and point to the fact
that some of the most compelling UAP videos
captured by the U.S. Navy
occurred in this exact location.
[Narrator reads on-screen text]
Petty Officer Third Class Gary Voorhis
is stationed on the USS Princeton,
a guided-missile cruiser that is one of the Navy's
most technologically-advanced warships.
Voorhis is part of a small team
that operates the ship's sophisticated weapon system.
[Voorhis] We control, basically,
the eyes and the brains of the ships, so,
everything that made the ship able to engage in combat,
we controlled all that stuff.
[Narrator] In November 2004,
the Princeton and five other U.S. warships were deployed
on a routine training exercise
100 miles south of Catalina Island.
But soon after the maneuvers began,
several mysterious objects
suddenly appeared on the ship's radar.
[Voorhis] We were tracking these unknown objects.
I personally only saw three
at a time, when I witnessed it,
but other shipmates of mine had seen, you know, five, six,
seven of them in formation,
and it was always a loose formation.
It wasn't like a perfect, you know, V or anything like that.
[Narrator] As Voorhis and his fellow shipmates
observed the objects on radar,
they struggled to identify the unknown craft.
[Voorhis] They were a little odd because they were flying
very, very slow, and they were only running about 100 knots.
And the other odd thing about these tracks is that
they didn't have any type of identification,
so it-it was very particular.
I think I kind of rationalized things
a little bit differently than most because,
in my world, things don't exist until they do.
Things don't really surprise me.
I remember cracking a joke when we first saw it.
I go, "What do we got, a fleet of balsa wood gliders
going across here?" 'Cause, you know,
for them to go that slow, it was just odd.
And then
the moment it did get a little serious for me
is when I finally did get a command
to take the computers down
and run diagnostics on them and
try to figure out if there was any issues.
And so, when I checked it, everything came out perfect,
and actually, the tracks were, if anything, much clearer,
even after we brought the systems back up.
So, they were 100% real radar tracks.
[Narrator] After tracking the unusual objects
for more than a week,
officers on board the Princeton took action.
They radioed the USS Nimitz aircraft carrier
to deploy two F/A-18 fighter jets to get a closer look.
But as soon as the jet fighters took to the sky,
the mysterious slow-moving craft
began to perform extraordinary maneuvers.
And it was during this mission
that the famous "Tic Tac" thermal video
was taken by one of the pilots.
[Voorhis] When people see the Tic Tac video,
you know, they're like, "It's just a dot on a screen,"
and what made it so amazing, it's not just a dot.
It's a thermal dot.
It's one universal color.
Where's the engine? The engine should be a different color.
Where are the wings? The wings should be
producing some type of friction in the air,
which would be a different color.
So, there's no way you were gonna have a thermal image
of something flying through the air
that didn't have a gradient of thermal going across it,
so it blew my mind.
And then, I think, at one point, it went to 28,000 feet,
just to five feet above sea level in, like,.7 seconds.
These are speeds that would literally crush a human.
And they're like, "Yeah, it is what you think it is.
We're tracking a, you know, a UFO."
[Corbell] Initial reporting was that when the Tic Tacs
were arriving at sea level,
there was a disturbance in the water,
like, a circular disturbance.
So it makes me wonder is were the Tic Tacs docking
with a USO under the water?
[Narrator] The UAP activity witnessed by Gary Voorhis
and other Navy personnel
off the coast of southern California
remains unexplained.
But almost 15 years later,
U.S. warships captured even more compelling video
near Catalina Island featuring what has been called
a "swarm" of UAPs.
One of these objects displayed particularly bizarre properties.
There was a really well-known case
from a Navy ship called the USS Omaha
off Southern California in 2019
where the sailors were observing,
on forward-looking infrared, a UAP,
a spherical object that had no flight control surfaces,
did not exhibit any exhaust from engine intakes or outtakes, and
the object then moved into the water
and wasn't seen again,
and we don't have anything like that.
[Tsoukalos] The USS Omaha footage is fascinating
insofar that there is no splash zone
in the video, and I've looked at that video dozens of times.
It's as if there's an artificial bubble
that allows this thing to move through material
without any loss of velocity.
I want to know. What are these objects?
How do they do it? What's their intention?
[Anna] I absolutely agree with Admiral Gallaudet that
there needs to be a focus on USOs
because we've heard directly from witnesses that
they had seen USOs actually outpacing our submarines
to the tune of 200 to 300 miles an hour underwater.
That, to me, is a massive red flag.
What are these things and
is it of nonhuman origin?
[Tsoukalos] The reason why I think it's significant
that a great majority of these sightings
happen over water, or now in the water,
is because
water is the same everywhere.
Whether it is water on Earth or on some distant planet,
it's a chemical element.
H2O.
H2O here is the same as H2O
on, you know, planet so-and-so.
So, if you figure out
how to use water as your main resource,
well, then, the universe has just become your playground.
[Narrator] Are the UAPs and USOs
encountered near Catalina Island
evidence of an alien presence in our seas?
And if so, could they be coming from a hidden base
deep underwater?
Ancient astronaut theorists say yes,
and suggest further evidence can be found
by examining a notorious encounter at a lake in Russia
that did not involve USOs
but alien beings.
♪ ♪
[Narrator] Lake Baikal, southern Siberia.
Formed nearly 30 million years ago,
it is the oldest lake on the planet,
and it was created by a fault where the Earth's crust
is still gradually pulling apart.
At over 12,000 square miles, the lake's surface area
is larger than the country of Belgium,
and it is home to thousands of species
of plants and animals.
Many of which cannot be found anywhere else on Earth.
[Dolan] Lake Baikal is known as the Pearl of Siberia.
It is the oldest and deepest freshwater lake in the world.
It actually has 20% of the entire amount
of freshwater on the planet Earth.
That includes even the Great Lakes.
It has such an immense volume of water.
It's really quite remarkable.
Now, that's in a region of Siberia
where it's very far from any real population center.
[Pope] Lake Baikal
is actually an area very rich in folklore.
There are encounters reported back throughout the years,
and it's a mysterious place.
[Paul Stonehill] Lake Baikal is one of the most unusual
water bodies on this planet.
For recorded history going back several centuries,
there have been sightings of USOs--
very unusual underwater submersible objects--
also, UFOs--
unidentified flying objects-- over its sky,
and also, very unusual beings.
In the early 1900s,
there was a story of the local people
catching so-called "pharaohs," "pharaony" in Russian.
Creatures that damage ships,
and they were very humanlike.
That lake is the scene
of one of the most, really, extraordinary claims
dealing with USOs that we have anywhere.
[Narrator] While dozens of strange events
are associated with Lake Baikal,
there is one that caught the attention of ufologists
all over the world.
It occurred in 1982,
when a team of Soviet navy divers
conducting a training exercise in the lake
had an alarming encounter.
[Dolan] According to the premier
Russian researcher of that time,
a man named Vladimir Azhazha,
who had very good connections with the Soviet military,
Soviet divers-- their equivalent of Navy SEALs--
encountered what had become known as "the swimmers."
[Stonehill] There are unusual humanoid beings,
three meter tall,
operating in the deep waters of Lake Baikal
without using any breathing apparatus or any other help,
and they were clad in silvery suits
and operating freely down below.
[Pope] Now, the divers
came back up, they reported this up the chain of command
and they were basically told,
"Well, go back down and try to capture one of these beings.
So, the divers went back down again.
[Dolan] They are at a couple of hundred feet,
and a shockwave occurs down there
and they had to surface immediately.
And what's tragic about this story is that the
depressurization chambers that the Soviet military had
were not all fully functional.
And several of these men were not able to get
depressurized quickly enough, and they died of the bends.
Now, there's other accounts relating to that
which indicate that they may have seen
a glowing kind of craft lower than their level.
Is it true? Is it not true?
We don't know, because during the Soviet era,
it was almost impossible to report genuine UFOs
until the fall of the Soviet Union
in 1991, '92,
when they started making these official.
[Narrator] Is it possible that Soviet divers
had a fatal encounter with extraterrestrial entities
living in Lake Baikal?
According to researchers, what makes the story
even more compelling
is how it relates to an ancient legend
told by the local Buryat people.
[Stonehill] They have a legend
about the underwater castle of the Erlik Khan.
That's how they call "the underwater king."
And it's of silver color.
So, this silver color
comes in throughout legends
of different people of Eurasia.
From the clothing of these underwater humanoid beings
to the description of this underwater castle,
and they're very serious about it.
[Pope] When you look at declassified
Russian government files,
it's very interesting that 50% of them
detail UAP
as being in some way associated with the ocean,
and another 15% associate them with lakes.
So, again, water is the key.
[Narrator] Could the incredible story of Lake Baikal
provide the strongest evidence yet
of an otherworldly presence in Earth's lakes and oceans?
Perhaps further clues can be found
by examining stories of unusual aquatic encounters
not in modern times but thousands of years ago.
[Narrator] The Soviet island of Sakhalin.
This ancient landmass has been contested ground
between Russia, China and Japan for centuries
due to its strategic location and rich natural resources.
In 1950, Soviet Prime Minister Joseph Stalin
orders the top-secret construction of a tunnel
to connect the island of Sakhalin to mainland Russia.
According to reports, the ambitious project
would yield an unexpected discovery.
27,000 people
were involved in this so-called Project 506.
There's only scant information, but it has been confirmed.
People who had worked there
had to sign nondisclosure agreements.
But we do know that while building the tunnel,
they encountered, in those hollows below,
remnants of much more ancient structures,
and remnants of
beings that are not human. I'm just going by
the description that's available.
And that's it. We don't know much more than that.
And just after Stalin's death in 1953,
it was abruptly stopped.
[Narrator] Could the stories be true
that the Soviet workers came upon ancient structures
and nonhuman bodies inside this undersea tunnel?
Perhaps clues can be found in the mythology
of the people who have lived on Sakhalin island
for thousands of years, called the Ainu.
The Ainu believe that otherworldly beings
have been coming to the island since ancient times.
[Stonehill] The Ainu people have an interesting mythology
and beliefs in visitations
from spirits, they call them,
or deities who would come and live with them.
[Narrator] The Ainu are considered to be
the descendants of the Jomon,
the original inhabitants of Japan
who emerged roughly 14,000 years ago.
The Jomon are best known
for the thousands of figurines they left behind
called the dogu,
which depict strange figures wearing garments
that many researchers have compared
to both space suits and diving suits.
As far as ancient astronaut theorists are concerned,
this is just one of many connections
between extraterrestrial beings and the sea
that appear throughout history.
[Tsoukalos] The earliest of culture bringers
to planet Earth was a fish deity called Oannes,
with the ancient Sumerians. And
it is described how this fish being
descended from the sky in physical form,
imparted knowledge
to the Babylonians and the first Sumerians.
And at night, this Oannes guy would walk into the water,
and that's where he would live.
And then reemerge the next day,
to impart more knowledge to the local population.
[Childress] Oannes comes out of the ocean,
and he then teaches the Babylonians
science and technology and medicine and agriculture.
So, he's an amphibious God.
[Narrator] Other tales of powerful beings
living underwater
can be found in the stories of ancient Greece.
The god Poseidon was the king of the seas,
and ruled a race of humanlike beings called the Telchines,
who could live both in and out of water.
And Poseidon's son Triton was often depicted
as a half man, half fish deity
who could control the waves of the ocean.
[Robert Stephan] So, Triton-- he's got the upper body of a man
and the lower body of a fish.
And what he does is, with his conch shell, he
brings the waves into action or calms the seas.
[Tsoukalos] What's fascinating is that while Triton
is initially described as a
single being, it's later written that
there is an entire race of Tritons.
And they have these magical conch shells
with which they can control the waves.
And they're also said to dwell
in golden palaces beneath the sea.
Now, when you look at this story with modern eyes,
you have to ask if what our ancestors witnessed
were flesh-and-blood extraterrestrials
wearing diving suits,
and these so-called golden palaces
were some type of underwater alien bases.
[Narrator] Another ancient story
involving an underwater dwelling place
can be found in the Hindu tale of evil entities
called the nivatakavachas,
who occupied an entire city
hidden deep below the surface of the Indian Ocean.
[Henry] The nivatakavachas live in this city beneath the ocean
that's said to be crystalline in nature, shining like gold,
and lit from a light that does not come from the Sun.
They have these incredible weapons that they use.
And so, in every way, shape and form,
the nivatakavachas sound like
some sort of technological creatures
that the ancient Hindu myth is telling us were real beings.
[Childress] We have these stories of these amphibious gods
who are instructing people all over the world.
And so, you know, you have to wonder
if this has to do with extraterrestrials.
[Narrator] Could the stories of the ancient world
reveal that our ancestors encountered extraterrestrials
in Earth's lakes and oceans?
And if so, have underwater alien bases
existed on our planet for thousands of years?
Ancient astronaut theorists believe we may soon know more
than ever before
as China begins construction on a research center
deep beneath the ocean.
[Narrator] Planet Earth has a surface area
of 197 million square miles.
Incredibly, the world that we inhabit on land
represents just one percent of the planet's livable space.
The rest belongs to the oceans,
and as of 2025,
only five percent of this vast expanse
has been significantly explored.
[Dolan] Our planet's oceans are
both explored and unexplored.
There's a lot that we've learned
over the last century or more about them.
But it is important to note that most of the ocean remains,
at a scientific level, not properly explored or mapped.
So, there's a lot that we don't know.
[Pope] The United States,
Russia, China are all
devoting a lot more time
and resources on exploring the oceans
and expanding their footprint.
It's very apparent that there's been
a shift in focus over the last few years,
and that the oceans are becoming more and more the focus
when it comes to the world's superpowers.
[Narrator] One country leading the charge
in deep-sea exploration is China.
In 2020, they launched a manned submersible
that can reach depths of nearly 15,000 feet.
And in February 2025, the Chinese government
announced plans to construct
a permanent underwater research base on the ocean floor.
This so-called "underwater space station"
will support six scientists for weeks at a time
at a depth of 6,500 feet,
far beyond the reach of military submarines.
This new underwater base that China is building
is truly incredible.
It's something that may have been considered impossible
just a decade ago.
And it really marks a moment in our history
where world leaders are starting to push their focus
from the skies to the seas.
[Pope] The amount of time, resources, money
that's been spent down there
leads one to speculate, "Do they know something?"
Is there something else under the ocean
that the public aren't being told about
but that the military and governments are aware of?
[Narrator] If China's plan for an underwater base succeeds,
scientists will gain access
to more extreme depths of the ocean than ever before.
But as we learn more about this aquatic realm,
what will we find?
Might the oceans offer our best chance
at discovering extraterrestrial life here on Earth?
[Gallaudet] I think it is the time
to take USOs seriously.
We have objects in our ocean,
just like UAP in the atmosphere
that are operating with impunity.
Think about what our Navy can learn
if we study USOs more, as well as
all of our maritime and undersea energy,
offshore energy technologies
by studying these phenomenon.
The truth is down there,
and it behooves us to go look for the same.
[Tsoukalos] When you think about the fact that
there are millions of square miles of ocean left to explore,
it's not outrageous to suggest
that there could be an extraterrestrial presence
underneath the sea.
[Henry] Stories of amphibious gods,
hybrid human-fish beings,
are rampant in the ancient world.
Is that what's in our future?
That there could be extraterrestrial beings
that will come out from deep within our own oceans
and have emerged to be our teachers?
[Narrator] As we continue to explore
what lies hidden deep below the surface
of Earth's vast waters,
will we encounter visitors from another planet?
Or even underwater alien bases?
And is it possible that otherworldly beings
have been hiding in our oceans and lakes
for thousands of years?
Perhaps when we finally make contact with alien beings,
they will not be out in the cosmos
but hiding in the waters of our own planet.
CAPTIONING PROVIDED BY A+E NETWORKS