Sky History2

Experts question whether the truth of our alien past could be buried in areas that, due to warfare or instability, are off-limits to exploration.

Experts scrutinise prehistoric ruins, asking whether humans could have built these advanced structures alone. Might they have had alien help.

Ancient alien theorists explore the origins of mythical gods. Could these tales of superhuman beings be based on sightings of extraterrestrials.

In 1947, the US military collected debris of what they claimed was a crashed weather balloon outside Roswell, New Mexico. But was there more to it.

The mega-rich love to display their wealth by acquiring flashy vehicles and the ancients were no different, whether it be chariots, horse-drawn carriages or boats.

All wealthy people have the resources to create their ideal home, but these industrial tycoons weren't content with building just one single house.

The Ancient Discoveries team recreate the kite bomb, a devastating medieval siege weapon, and test the world's first parachute from 6,000 feet.

...Bill Clinton. Building the Economy: Explore the history of the Presidency. Here, how some exerted power over the economy and the impact of those actions. (3 of.

...Bill Clinton. Extremism: Explore the history of the Presidency. Here, a look at multiple flashpoints in the nation's history, and the ways Presidents tackle extremism. (4 of.

Cleopatra II's reign was a truly dramatic and grisly tale. She saw her dynasty torn apart by hatred - but also saved it from destruction.

Ross Kemp is shocked by what he discovers as he dives on the wreck of a steam-age ship in north Devon, and a potential early slaver ship in Plymouth.

The team search for remains of the crashed WWII Spitfire and discover parts of the cockpit. (1 of.

Stone Age Engineering and Battle of Bullecourt: Finds from the East include a monument as old as Stonehenge and some disturbing Roman burials. (3 of.

William Shatner embarks on his quest for answers to the unexplainable - from sudden disappearances, to evil possession.

The Search for the Ark of the Covenant: William Shatner continues his quest to find answers to the unexplainable, this week embarking on an ambitious search.

A look at the Petrozavodsk incident of 1977 - one of the key moments that helped to determine the official Soviet response to the UFO phenomenon.

This July, 75 years have passed since the Roswell incident. This two-part documentary revisits the alleged crash of an extra terrestrial craft at Roswell, New Mexico in 1947. (2 of.

Experts investigate the US government's experiments into teleportation. They also dig into strange happenings at Mount Shasta and Skinwalker ranch.

As one of their most controversial scientists, Heisenberg was key in the Nazis' efforts to build an atomic bomb. How close was he to achieving his goal.

The story of Hitler's dysfunctional home life. His parents were closely related, and in his adult years, he was rumoured to have engaged in incest himself. (3 of.