Experts investigate a strange glowing lake reported to turn things into stone. A mysterious structure in Africa that resembles Stonehenge is said to be the resting place of a mythical giant.
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When a great white shark is killed, experts suspect a mysterious ocean monster and strange markings in the desert might be a tribute to an ancient spider god.
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 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, with some experts speculating that it's evidence of alien activity.
A demonic truck driver, disembodied voices, nightmarish skinwalkers and a time loop are all reported to exist in Canyonlands National Park.
This tourist hotspot is also rumoured to be the epicentre of dark and sinister forces from Native American lore that lure visitors to their deaths.
A stroll through Great Sand Dunes National Park, where strange lights, animal mutilations and other bizarre incidents have been spotted.
The infamous Yosemite National Park has a darker side that includes mysterious sightings, disappearances and even a prehistoric pterodactyl.
Physicist Enrico Fermi posited his famous paradox in the early 1950s, asking if intelligent life is so likely to occur in the vastness of the universe, then why hasn't any of it contacted the Earth?
If aliens have visited Earth, what are their intentions? Do they wish to experiment on the human body, or the human mind as well?
Those who claim to have been abducted by extraterrestrials give their accounts of the interior of their spacecrafts.
In this gripping episode, Craig and Sarah take on the Stephenville UFO case. They scrutinise all available evidence, talk to key eyewitnesses and grill experts before arriving at a final verdict. This programme contains some flashing images.
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.
Documentarian Seth Breedlove and his crew are joined by leading investigators on an adventure-filled week searching for Sasquatch in the Adirondacks of upstate New York.
In Afghanistan, Lance Corporal Jose Herrera encounters death scents, orbs of light, and unease beyond the normal stress of war. In CA, Auburn White's colleague's eyes turn black, she levitates after falling asleep, and they all seek answers.
During an exercise, a Staff Sergeant encounters a shadowy figure with long dark hair. She attacks him, then disappears. In one of Saddam Hussein's former torture houses, US Marine James Gelston hears horrifying screams. Who or what did he hear?
Journey into the heart of Sasquatch Country with Todd Standing ("Survivor man Bigfoot"). Experience three incredible days in the field with bigfoot researchers and experts as they encounter a real life Sasquatch.
In this episode, Craig and Sarah take a closer look at a case that took place in November 2018 off the west coast of Ireland in which pilots saw bizarre lights through their cockpit windows. This programme contains some flashing images.
Experts investigate a strange glowing lake reported to turn things into stone. A mysterious structure in Africa that resembles Stonehenge is said to be the resting place of a mythical giant.
Evidence of ghostly apparitions at a Civil War battlefield when mysterious blue fires start near Yellowstone, experts 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.
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