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Atlantis, the legendary continent that sank. As the Nazis rose to power, Himmler and the SS were convinced Atlantis existed. Season premiere.

Could the Founding Fathers have hidden secrets about ancient aliens in their documents, buildings and symbols? Experts investigate.

The series investigates satellite images of what seems to be a giant face carved into the earth in Alberta. Could this have extraterrestrial origins.

Dan is in the heart of Snowdonia exploring a Caernarfon Castle - built not only as an impenetrable fortress but also as a lavish royal palace fit for a fairy tale.

A look at the first weeks of a war that would disrupt the lives of so many, starting with the first shots fired by the Japanese in July 1937, China.

William Shatner digs deep into our ancient past to discover our predecessors' epic feats of engineering, from the remarkable to the inexplicable.

In 1966, a class of Melbourne students spot a UFO and are told never to speak of the incident. A man's car dies in 2009 after he spots a cigar-shaped object in the New York sky.

A teenager sees a mushroom-shaped object appear in the field while feeding his sheep in 1971. In 2000, police officers in Illinois chase a triangular UFO the size of a house.

From Mexico's mystifying Zone of Silence, to Markawasi Plateau in Peru, known for its frequent UFO sightings, were these the homes of ancient aliens.

For millennia, people have believed that everyday objects can possess hidden energy. These talismans are seen to provide protection and good fortune.

Stirling has long been one of the most strategically important castles in Britain. Dan Jones examines the rich and savage history of this stronghold.

Explore the top theories behind what caused the unexplained illnesses in US diplomats in 2017, later known as 'The Havana Syndrome'.

If aliens came calling, who would speak on behalf of humans? Discover what protocols exist should extraterrestrials contact Earth.

Physicist Bob Lazar says he was hired to reverse-engineer an alien spacecraft by the US government, with a fuel source that had the power to change the world.

Churchill must make crucial decisions and figure out how to navigate big changes as the war rages on and Britain makes a powerful ally. (3 of.

Britain's Frontline Bomber: The troubled beginnings and amazing exploits of the legendary British heavy bomber. Plus, see a replica up close. (1 of.

60 years on, Tony's close encounter has become an obsession. Meanwhile, pilot David presents photographic evidence of the UFO he almost crashed into whilst flying near area 51.

Learn about the discovery of an 11,000-year-old stone monument which may hold the secret to the location of the Garden of Eden.

The Sphere, the Prophecy Machine and the Canary: Examine claims Nostradamus predicted Hitler. Plus, learn about the canary resuscitator and a tiny object with the power to kill.

A small community is devastated by an earth-shattering 'boom,' while an paranormal fog seems to alter the very fabric of time.

The team find evidence from one of Scotland's bloodiest eras as they wade through the waters of the River Garry in the stunning Scottish Highlands.

Mastermind Nuno Pontes leads six men to escape Pittsburgh State Penitentiary by tunnelling the under the wall. However, their freedom is short-lived.

HM Maze prison was a notorious lock up for IRA prisoners in Ireland. A small ring of them secretly planned what they hoped would be a massive prison break.

His epic battles with Grendel and his mother have made Beowulf the Viking world's most famous warrior. But could this mythological hero have been based on a real person.

If aliens came calling, who would speak on behalf of humans? Discover what protocols exist should extraterrestrials contact Earth.