Sky History2

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.

Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history.

Explore classic and underrated aircraft, from WWII fighters to the Screaming Eagles F4, showcasing aviation's evolving history.

The Soviet Union's submarines courted huge controversy in 1945 when they caused massive losses of life at sea. A look from the Russian perspective. (6 of.

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.

In Northumbria, skeletons tell tales of violent death and tenderness, and people curate grave goods in an amazing community project.

Alice looks into the history of York, taking part in a Viking battle and examining an almost 1,000-year-old poo. (2 of.

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.

Nazi scientists conducted brutal experiments for an Aryan master race, while zoologists ran their own bizarre trials.

Near the Czech border, a secret German site, "The Giant," tests The Bell, powered by Serum 525, turning all who touch it into rotting living zombies.

A newly discovered town in Devon turns history on its head and there's a shocking find by the Thames - almost 100 baby skeletons.

Alice studies the history of Cheltenham, Britain's most Regency town. She attends a period society ball, investigates the rigid social hierarchy and more. (5 of.

The myth of Merlin is associated with an arrangement of stones in northern France. Satellite images might finally explain this ancient riddle.

The Mafia's power in Canada becomes clearer. Seven primary mob families are identified and blood spills on the streets of Canada and Italy.

The Rollin' 60s Crips fight for dominance in LA's gang world, facing fierce rivalries as they strive to control the city's streets.

Witness a fallout when the Cleveland Mafia places high-stakes bets in Las Vegas. As fortunes are made and lost, tension mounts back home.

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