When footage of a strange deep-sea vessel is uncovered, experts wonder if its evidence of an autonomous alien craft sent to explore earth, and using cutting-edge tech, investigators follow the clues to an unexpected explanation.

A hunchbacked creature scurries out of the jungle in Costa Rica; experts consider if this could be the mythical beast known as La Mona, a person with a rare medical condition, or the result of a powerful drug known as the devil's breath...

On a Native American reservation in Utah, evidence of a man transforming into an animal is caught on camera, and some experts ask if it's proof of a Skinwalker, a legendary evil creature that can shapeshift into a deadly beast.

Strange footage captures a mystifying monster, baffling marine biologists. Bizarre ghost lights haunt North Carolina mountains for centuries. When a giant explosion is caught on tape in New Mexico, investigators fear the US is under attack.

A stargazer in Scotland films what looks like a ship breaking off from a meteor in an area known for UFO sightings; experts consider whether this could be a high-tech NASA operation, a delicate military refueling maneuver, or something else entirely...

Deep sea explorers discover an unknown monster thousands of feet beneath the ocean. Killer fog threatens a town in the American Midwest. A truck spontaneously explodes on a busy freeway.

Footage of a fearsome wolf-like creature in the remote wilderness of northern Canada could be evidence of a dire wolf, a prehistoric beast that went extinct at the end of the last Ice Age; experts use cutting-edge tech to investigate if it has returned.

When a shark is eaten by a mysterious predator, experts wonder if a prehistoric monster is to blame. A sinister sight is caught on tape near Russia's Area 51, and the evidence might point to a cover-up.

A bizarre, tentacled black mass emerges from the seas on an island in the Caribbean, and on-lookers are horrified as it writhes ashore; experts use cutting-edge tech to investigate the origin of this alien invader.

A sudden sewer explosion in China buries two young girls in rubble.

When a terrifying tower of fire is caught on camera, eyewitnesses fear an alien invasion, and using cutting-edge science, experts investigate the threat causing this nightmarish phenomenon—and if a cover-up is hiding the truth.

A strange beast is spotted in a remote Brazilian town. A cataclysmic blast sparks fears of nuclear disaster. When a child displays superhuman powers, some fear it's the devil's work.

When a river of blood washes through a city's streets, some witnesses believe it's a warning of doomsday. A strange perfect circle emerges in the clouds about California, and some experts speculate that it's evidence of alien activity.

A giant creature in an armor of ice is spotted in the Alaskan wild, and some suspect it's a deadly mythical monster. A jet has a close encounter with an unknown object. Evidence of a deadly lightning strike invites paranormal explanations.

When a ghostly figure is caught on tape stalking people in Japan, some fear its hard evidence of a spooky local legend. A mysterious flame appears in the Norwegian wilderness with the fury of the Viking god Thor and it could be a secret weapons test.

A strange creature like the Loch Ness Monster is recorded in America. Experts analyze evidence of a giant scaly egg, and some wonder if it belongs to a dragon. Birds are suddenly vaporized by an invisible death ray.

Cameras capture a towering 1,600 foot pillar of flame erupting from the Caspian Sea off the coast of Azerbaijan; experts investigate a potential link to the nation's weapons arsenal and military aspirations over disputed neighboring territory.

When something strange is caught on camera in a tunnel beneath the Colombian jungle, experts wonder if it's a wormhole to far-off places in the cosmos, and using cutting-edge tech, they investigate if there's an interdimensional conspiracy at play.

A truck engulfed in flames barrels down a lonely Brazilian highway...

Two young men capture a demonic figure in the mountains of Jordan.

A deep-ocean expedition discovers unnerving evidence of an alien-like monster stirring in the abyss. When a shockwave is caught on tape, investigators wonder if a meteor has hit a city. Something bizarre is happening in a Siberian ice river.

When a massive plume of smoke suddenly erupts from the ground in Manhattan, experts investigate if this terrifying event is evidence of a volcano that's waking up beneath the streets of New York City—and if it's almost due to blow.

A camera captures footage of a Chupcabra-like beast. On Hawaii's Mauna Kea, cameras record a mysterious explosion that looks like a nuclear bomb detonated in space. Video of spontaneous combustion is taken at a haunted bar.

Moments before Pablo Escobar's abandoned luxury building is demolished, cameras capture footage of a ghostly figure in the window, and some believe it was the notorious drug lord himself; experts investigate who this phantom was and what happened to them.

Doctors discover a mysterious parasitic species inside a man's nose.

A surveillance camera captures a woman vanishing from her bed as she sleeps next to her husband in their suburban English home. Experts investigate and uncover numerous police records that report a strange pattern of nearby alien abductions.

A villager captures a series of explosions on a mountainside in India.

A gravity-defying cube spins through the skies over Missouri.

Cameras capture stunned pedestrians running for cover as droplets of fire begin to rain down on the streets of St. Petersburg, Russia; experts investigate a network of nearby tram lines and the effect of a sudden lightning storm.

Cameras capture a huge fireball erupting in a North Korean border town.

Cameras capture mysterious objects that explode over the skies of Norway.

A vacationing family films waves of fire on the shores of Indonesia.

An explorer searching for treasure at a Mayan sacrificial site is attacked by a mysterious underwater fog. Thousands of fish spontaneously jump to their deaths. Something alien appears over the skies of Lost Angeles.

A strange creature on the site of one of the worst nuclear disasters ever sparks fears of a terrifying genetic mutation. New evidence suggests a legendary predator with a thirst for blood might have come back from the dead.

A villager films a river bank suddenly rising as though a gigantic creature is emerging from beneath the waters in India; experts investigate a potential network of criminal gangs who may be stripping river beds of a very valuable commodity.

When cameras capture footage of a highway swarmed with snake-like creatures and an unexplained ooze, experts investigate the origins of these alien creatures; the latest tech reveals where they came from and their top-secret purpose.

Cameras onboard a massive cargo ship in the Black Sea capture the vessel buckling and breaking in half as if seized by a mysterious force; experts investigate a bizarre area of perilous waters linked to a history of Bermuda Triangle-like sinkings.

When footage reveals a man's leg taking on a life of its own, it appears that something alien is trying to burst free; cutting-edge science investigates what explains this strange and sinister possession, and what it takes to exorcise the invader inside.

When cameras capture footage of a massive, never-before-seen sea creature in mysterious waters near Japan, some experts wonder if it's an undiscovered underwater monster; using cutting-edge tech, investigators hunt for this beast of the deep.

Security cameras capture an empty car moving as if driven by a ghost.

Cameras capture something shocking in a cemetery: empty graves, as if the dead walked out in the middle of the night; using cutting-edge tech, experts investigate what's behind this apparent evidence of zombie activity.

Cameras in Kazakhstan capture a bizarre blast as train cars on a quiet railway suddenly explode in a raging inferno.

In Washington D.C., a naked man chases after a car at superhuman speed; experts consider if the man could be the product of government attempts at creating a super soldier, or the failed result of a mind-control experiment...

When cameras capture footage of a man who appears to lay an egg, some experts wonder if it's evidence that scientists created a human-reptile mutant through gene manipulation; using cutting-edge tech, investigators put this horrifying theory to the test.

When a massive spider's web takes over a park, experts investigate if this monster's trap could capture a human. A tree spurts out thick red blood, and some believe it could be an undiscovered species of carnivorous plant.

A camera captures a person inexplicably bursting into flames. An ancient statue at a museum appears to come to life at night. An alien-like creature is filmed in the sewers. Eerie lights caught on camera may explain a mysterious death.

A medical assistant films as a snake is extracted from a patient's mouth.

A man filming a wedding flees in terror as a mysterious explosion rips through the festivities; an explorer in the wild jungle of Vietnam comes across a bizarre tree whose trunk shimmers as though it is alive...

When cameras record a strange creature in the wilderness perform an incredible feat of strength, some suspect it's hard proof of Bigfoot; using cutting-edge science, experts investigate if they've discovered the spawn of Sasquatch and Iron Man.

A fire-breathing crater burns in the middle of a desert and some suspect it's a gateway to hell. A deadly shark is found lurking in a golf course water hazard and experts are baffled how it got there. A giant white blob threatens a California town.