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Uncover a perfect circle carved around an ancient peak, a scary phenomenon in the Pacific and strange shapes in a Middle Eastern desert.

Investigate the secrets behind the Hadzabe Myth in Tanzania, visit Colorado's incredible Cheyenne Mountain Complex and check out a fascinating abandoned boat in Croatia.

Baffling stories of people who vanished without a trace, including a young Tasmanian pilot who is chased by unidentified aircraft before disappearing.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases.

In 1969, the US government officially announced it would stop investigating UFOs, but declassified documents seem to tell another story.

Did the space race stop at just the Moon? Is there any truth to rumours of a secret Space Force developed by America for missions beyond Earth's orbit.

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth.

From the lore and history of ancient Egypt to the myths of Native Americans, mankind's past is riddled with the evidence of UFOs.

Strange light patterns are seen in Texas. In France, a man's knee injury is suddenly healed after an odd encounter.

A couple spot a huge blimp-shaped craft hovering over Michigan's Lake Erie in 1988. In 1963, two sisters and their housekeeper report being knocked down by a UFO emitting flames.

Roadworks on the A9 road uncover the remains of a young woman who lived and died in the early Bronze Age. Was she one of the so-called Beaker People.

Ben Fogle steps aboard the iconic tea clipper on her 140th anniversary to examine the full story of the world-famous ship and the desperate attempts to save her from the scrap yard.

The ghost towns of the twilight zone. America's secret starvation experiment. The atomic ice worm. Rome's mystery ancient megastructure and the Island that changed history.

Uncover a perfect circle carved around an ancient peak, a scary phenomenon in the Pacific and strange shapes in a Middle Eastern desert.

Investigate the secrets behind the Hadzabe Myth in Tanzania, visit Colorado's incredible Cheyenne Mountain Complex and check out a fascinating abandoned boat in Croatia.

Baffling stories of people who vanished without a trace, including a young Tasmanian pilot who is chased by unidentified aircraft before disappearing.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases.

The world's most haunted doll shows off its magic, a family in Oklahoma has a ghostly new roommate and a misty cryptid is caught on a security cam in the woods of Wisconsin.

Ghosts flock to a quaint coastal farmhouse. A pastor's sermon is interrupted by the Devil himself and a woman and her dogs have multiple terrifying encounters with Bigfoot.

The ghost towns of the twilight zone. America's secret starvation experiment. The atomic ice worm. Rome's mystery ancient megastructure and the Island that changed history.