Alien Achilles Heel. Many believe aliens are already here on Earth. Could they be plotting an attack? And if so, can humans survive their weapons' terrifying capabilities?
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Discover terrifying new images of a blob swallowing a city, spy ships attacking America, skydiving cannibal spiders and the radioactive killer fly factory.
A secret underground military research station in the middle of the Greenland Ice Sheet is revealed as one of the most elaborate cover stories in the history of the Cold War.
Thirty World War II aircraft all crashed in the same spot on the Greenland Ice sheet, causing experts to wonder if they all fell victim to the Arctic's Bermuda Triangle.
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.
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.
Since reports of a disc crashing in Roswell in 1947, the archetypal UFO – the flying saucer – has captured public imagination. Craig and Sarah explore if flying saucers are evidence of extra-terrestrials. This programme contains some flashing images.
Alien Achilles Heel. Many believe aliens are already here on Earth. Could they be plotting an attack? And if so, can humans survive their weapons' terrifying capabilities?
The compelling series returns to examine more eerie reports of UFOs. Can it determine where in the universe such strange flying crafts could be coming from?
July 2022 marks the 75th anniversary of the Granddaddy of all UFO mysteries: the alleged crash of an extraterrestrial craft at Roswell, New Mexico in 1947, which has dominated the UFO mystery genre.
Grieving siblings trespass into the territory of a legendary beast during a midnight drive. A weekend getaway ends in a terrifying encounter.
Often, even skilled professionals are no match for the spirits they encounter, as those hunting in the great outdoors become the ones stalked as prey.
When a family takes up residence in an old house on a sprawling hospital campus, each member experiences the inexplicable. Events escalate until they are forced to flee.
A woman tries to banish a shadow from her office, while a man claims he has experienced poltergeists and the spirit of a dead doctor in a hospital.
Grieving siblings trespass into the territory of a legendary beast during a midnight drive. A weekend getaway ends in a terrifying encounter.
Often, even skilled professionals are no match for the spirits they encounter, as those hunting in the great outdoors become the ones stalked as prey.
In a Danish bog, hundreds of mutilated ancient bones are found. A mysterious deserted island belonging to Russia is explored. Massive strange patterns on the ground are discovered in northern Kazakhstan.
A grim discovery in a Swedish lake reveals shocking ancient practices. In the Canadian Arctic, the fossil of a previously unknown mammal is found. Bizarre ice formations in the Antarctic Ocean are investigated.
A secret military base is discovered a few hundred miles from the North Pole. A man-made, ancient stone formation is found 120 feet below the surface of Lake Huron. A 1500 year old burial ground is discovered on the shores of the Baltic Sea.
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