Sky History2

The SS Normandie entered service in 1935 and remains the most powerful steam turbo-electric-propelled passenger ship ever built. (1 of.

In the Swiss Alps, a Roman dagger discovery reveals a 2,000-year-old battlefield where the Suanetes tribe fell to the Roman Empire.

A dagger sealed in King Tut's tomb for over 3,000 years is made of a possibly extraterrestrial metal. A huge swastika is found in the desert near Roswell.

In the shadow of the war, the Nazi regime gradually advances its "final solution to the Jewish problem.

Along with Treblinka and Majdanek, Sobibor was one of the camps used in Operation Reinhard, in which the Nazis murdered almost two million people.

Experts open up NASA and secret government files. Can they find proof of alien contact in the recent or ancient past.

Experts explore the similarities between huge pyramids across the world. Could extraterrestrials have influenced their construction and design.

In 1974, a Saskatchewan farmer reports seeing objects hovering in a field before they vanish into the ether. Connecticut citizens witness strange lights and a giant UFO in 1984.

In Nova Scotia, a former naval officer sees five bright lights in the skies and a cigar-shaped object behind them.

Alice Roberts and Matt Williams visit the Neolithic Orkney World Heritage Site, where they explore finds from archaeological digs across the north of Britain.

Andy travels to Scotland, visiting the heart-rending doggy suicide bridge and learning about a terrifying family of cannibals who used to prey upon weary travellers.

The SS Normandie entered service in 1935 and remains the most powerful steam turbo-electric-propelled passenger ship ever built. (1 of.

In the Swiss Alps, a Roman dagger discovery reveals a 2,000-year-old battlefield where the Suanetes tribe fell to the Roman Empire.

Giorgio Tsoukalos takes a look back at the most compelling investigations of all, and events that he believes represent real encounters with extraterrestrial visitors.

In the shadow of the war, the Nazi regime gradually advances its "final solution to the Jewish problem.

Along with Treblinka and Majdanek, Sobibor was one of the camps used in Operation Reinhard, in which the Nazis murdered almost two million people.

The enigmatic Egyptian Queen's untold story is one of a ruthless genius, doing anything necessary to cling to power in the face of an ever-expanding Roman Empire.

Experts explore the similarities between huge pyramids across the world. Could extraterrestrials have influenced their construction and design.

Experts open up NASA and secret government files. Can they find proof of alien contact in the recent or ancient past.

In 1974, a Saskatchewan farmer reports seeing objects hovering in a field before they vanish into the ether. Connecticut citizens witness strange lights and a giant UFO in 1984.

In Nova Scotia, a former naval officer sees five bright lights in the skies and a cigar-shaped object behind them.

Alice Roberts and Matt Williams visit the Neolithic Orkney World Heritage Site, where they explore finds from archaeological digs across the north of Britain.