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.

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.

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.

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 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 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.

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.

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.

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.

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.