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 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.

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.

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.

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.

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.

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.

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 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 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.

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.

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.

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.

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

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

A young woman captures a doll that mysteriously comes to life inside a closet as she house sits alone in Dallas; experts investigate and reveal terrifying accounts of haunted dolls possessed by demonic souls.

A village mourner at an Indonesian funeral films a dead man's hand waving through the glass window of a coffin; experts investigate and uncover powerful local priests and the practice of black magic rituals to reanimate corpses back from the dead.

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.

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.

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.

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

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.