Security guards encounter a door repeatedly opening and slamming shut.

Experts investigate how a boy can twist his head 180 degrees.

Experts investigate footage of an ape-like creature in Russia.

A bizarre explosion is captured that morphs into a sinister black ring of smoke above a California football stadium; experts investigate and uncover an underground network of Satanists with connections to a string of modern-day terrorist plots.

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

Experts investigate evidence of flying, fire-breathing creatures.

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.

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.

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.

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

When a strange, dried-out creature washes ashore downriver from a nuclear power plant, some experts suspect it's the mummified corpse of a mutant; using the latest science and tech, this incredible theory is put to the test.

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.

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.

When cameras capture footage of a swam of millions of strange creatures invading a church, some wonder if it's evidence of a grisly secret buried in the ground below; using cutting-edge tech, experts investigate the threat this insect army poses.

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.

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.

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.

A family encounters a ferocious wall of fire that erupts and engulfs a Beijing highway. Local tribesman discover a foreign, giant blob in the Amazon rain forest, and during a video call, a woman unknowingly captures a figure lurking in her home.

When cameras capture footage of a strange, human-sized egg floating in Arctic waters, some experts wonder if it's evidence of alien life; using cutting-edge technology, investigators try to reveal the true origins of this unexplained discovery.

After cameras capture footage of a UFO over Las Vegas, officials claim it's just a meteor, but some suspect something far stranger; using cutting-edge tech, experts investigate if it's evidence of an alien visit or a top-secret military project.

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 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.

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.

In Egypt, a freakish animal is caught on camera, and using cutting-edge tech, experts investigate if this strange beast could explain the secrets of a satanic deity that was once believed to have been worshiped here.

When a bizarre, alien skeleton is found in an abandoned compound in the Himalayas, some speculate that it's the corpse of a newly-dead dinosaur, and using cutting-edge tech, experts investigate if it's evidence of a top-secret Jurassic Park.

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.

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.

When something strange is recorded flying in Mexico, some wonder if it's a witch reputed to kidnap children, others believe it's evidence of a new way to smuggle drugs or top-secret technology; the latest science helps experts investigate the truth.

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.

When a mysterious fog and a huge explosion strike at once, some suspect a napalm attack on American soil, but using cutting-edge tech, experts find that the truth could be more dangerous than ever imagined.

When a ghostly encounter in a cemetery is caught on camera, experts use cutting-edge tech and the latest science to investigate if something paranormal is at play.

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.

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.

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 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.

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 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.

Evidence of ghostly apparitions is captured at a Civil War battlefield. When strange blue fires start near Yellowstone, some worry if a supervolcano eruption is imminent. Near the site of the Salem Witch Trials, an eerie spectacle stuns scientists.

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.

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.

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.

Near Area 51, a police convoy is filmed transporting a alien-looking craft in the dead of night. When strange beams of light are reported in Argentina, experts investigate if it's proof of a terrifying Nazi superweapon.

A sinister locomotive breathes fire into the night sky, and locals fear it's a demonic train coming to claim their souls. When something terrifying emerges from a mysterious lake in Ireland, experts wonder if it could be a modern-day leviathan.

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 man is recorded surviving two lightning strikes in moments. Cameras spot strange lights in the Norway sky, turning a remote area into a UFO hot spot. A bizarre glowing object is caught on tape at a museum, and some wonder if it's an alien artifact.

An eerie creature is recorded stalking a Georgia forest, and some believe it's Bigfoot. Terrifying explosions rock the streets of Manhattan. Cameras record a mysterious object diving into a deadly volcano, leaving experts stumped.

A high-speed chase ends when the fugitive makes an impossible getaway. A Louisiana swamp devours 100-foot trees, and experts worry a nearby town could be next. Three cars are filmed mysteriously levitating at a busy intersection.

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.

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 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.

Marine scientists discover a gruesome underwater death zone that seems to kill anything that dares to enter. When apocalyptic skies appear during a deadly earthquake in Ecuador, residents fear it's the end of days.

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.

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.