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Ancient astronaut theorists hunt for evidence linking Bigfoot to alien species from the distant past. Could the ape-like giant be an extraterrestrial.

Ancient astronaut experts believe the minds of Einstein and Galileo were superhuman. Could these historical geniuses have had extraterrestrial connections.

The story of the World War II aircraft carrier USS Enterprise. Join her as she sets sail in the Pacific on a mission to sink enemy submarines.

A protest turns into a racist and anti-Jewish movement during the 1920s and the NSDAP use emotions to gain the loyalty of the people.

Craig and Sarah look at the Yorkshire case of Alan Godfrey, who was allegedly abducted by a UFO. Godfrey underwent hypnosis in support of his claim.

Startling evidence suggests the US military has been under attack from aliens for 50 years. Could they be keeping such a huge secret from the public.

Could the ability to travel through time be real? Experts unseal new evidence suggesting this phenomenon of science fiction might not be as far-fetched as it seems.

In this round, the competitors are tasked with creating a special piece that reflects the hurdles they have overcome in their respective pasts.

In this round, the competitors are challenged with creating an intricately crafted accessory for a high fashion look.

Experts examine the megalithic complex of Gobekli Tepe, and ask if such an advanced structure could possibly have been built by humans alone.

Researchers claim hidden messages can be found within the works of Leonardo da Vinci that may reveal an extraterrestrial influence.

International experts demonstrate in experiments the most important ranged weapons in history, including the Roman spear, the English long bow and the minié ball.

Germany invades Poland, sparking global war: Japan expands in Asia and Africa's colonies become key battlegrounds for power and resources.

Experts reveal the highly encrypted phones that criminal gangs use to stay under the radar, and explain how the police are turning the phones against the crooks.

Experts examine the megalithic complex of Gobekli Tepe, and ask if such an advanced structure could possibly have been built by humans alone.

Researchers claim hidden messages can be found within the works of Leonardo da Vinci that may reveal an extraterrestrial influence.

A Roman Mystery And Waterloo's Disappearing Dead: Roberts uncovers East of England's top finds, including a Roman dodecahedron, Boudicca's fort and Waterloo's lost dead.

Discoveries in southern England reveal Britain's oldest shoe, a forgotten warrior king's shipyard and hidden World War II defences.

Digs in western Britain uncover a forgotten fortress and a shocking discovery hidden beneath a Roman mosaic.

An awe-inspiring year of archaeological digs with Dr Alice Roberts. Roman finds include an amazing coin hoard and a man buried on a pile of dead animals.

Humans are found to have lived in Britain earlier than thought when tools are unearthed in Norfolk, while some of our ancestors' customs are revealed at another dig.

Hairy Serpents, South Pole Nazis and the Horrible Blob: What is this serpent-like creature caught on camera? And did the Nazis once colonise the South Pole.

Germany invades Poland, sparking global war: Japan expands in Asia and Africa's colonies become key battlegrounds for power and resources.

In the absence of humanity, the world's most iconic cities are reclaimed by nature, as animals roam free and fire and flood centuries of construction.

Infrared Ufo Attack, Human Bear and Underwater Crop Circles: Did a UFO follow two researchers home from an investigation and how did a bear learn to act like a human.

Whale Eats Kayakers, Trucks vs Trains, Flames & Cranes & Historic Eiffel Tower Jump: A worker is trapped on a burning building's ledge and kayakers are swallowed by a whale.

Experts examine the megalithic complex of Gobekli Tepe, and ask if such an advanced structure could possibly have been built by humans alone.