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Four US Air Force reservists are pursued by odd lights. Constable Alan Godfrey loses consciousness when he investigates a strange disruption in West Yorkshire.

A hitchhiker is terrified when lights appear to attack him. A sighting in France becomes one of the most investigated cases in UFO history.

For thousands of years, humankind has attempted to make contact with extraterrestrial beings from beyond Earth.

Experts investigate reports of strange bronze flying ships spotted during the Black Death. Could aliens have brought deadly disease to Earth.

Churchill's - and Britain's - influence begins to shrink as the Soviet Union and the United States grow into the most significant actors in the war. (4 of.

Xialong Zhang and Cao Guangzhi were two Chinese nationals who attempted to steal proprietary information from US companies for their Chinese competitors.

From ghostly voices to vanishing UFOs, experts investigate puzzling and mysterious signal interferences and break down the meanings behind them.

For thousands of years, humankind has attempted to make contact with extraterrestrial beings from beyond Earth.

Experts investigate reports of strange bronze flying ships spotted during the Black Death. Could aliens have brought deadly disease to Earth.

Set sail for Rathlin Island as we explore a Neolithic stone tool factory, a unique upside-down lighthouse and a World War II shipwreck. (3 of.

...Hate The English? Scotland. Al catches up with Fred MacAulay as they unravel the deep-seated hostility between England and neighbours to the north Scotland.

Churchill's - and Britain's - influence begins to shrink as the Soviet Union and the United States grow into the most significant actors in the war. (4 of.

The story of the Great Locomotive Chase - an attempt by Northern spies to steal steam locomotive The General during the American Civil War.

Could a breed of dogs have the power to freeze time? Do invisibility cloaks really exist? The team examine the videos and reach a verdict.

A mysterious creature is discovered in Russia, a possible genetic experiment goes wrong and a fire has a mind of its own.

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena.

In 1966, two Ohio police officers spot a strange light in the sky, triggering a chase across state lines. An ex-military man in Florida is knocked out by a beam of light in 1965.

Four US Air Force reservists are pursued by odd lights. Constable Alan Godfrey loses consciousness when he investigates a strange disruption in West Yorkshire.

Science reveals new insights into belief and superstition in the land of the Pharaohs, from finding the long-lost 'Land of Punt' to Tutankhamun.

Witness the dark origin stories behind some of history's most notorious methods of execution, from the guillotine to the electric chair.

Warrior's Revenge: Continue the story of Odysseus, a timeless tale of adventure filled with mythological beasts and vengeful gods. But could it actually have happened.

A look at slavery in ancient Rome and how Spartacus broke out of gladiator school and started the most terrifying slave revolt in Roman history.