Sky History 2 Saturday

Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code

A look at whether or not Area 51's notoriety acts as a cover-up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations

Marty Lagina joins Giorgio Tsoukalos to explore the statues, pyramids and structures left behind by one of the most mysterious cultures in the ancient world in Sardinia, Italy

The Waco siege, a 51-day standoff involving the Branch Davidians 1993, left nearly 80 people dead. This episode re-examines the shootout and the role played by David Koresh

Aerial views offer a fresh perspective on massive concrete arrows scattered across America. Plus, a mysterious hole in the middle of a lake in Southern California

Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code

A look at whether or not Area 51's notoriety acts as a cover-up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations

Previously sealed documents hint at compelling new theories about extraterrestrials as experts question whether former US presidents may have been concealing the truth

The Nazi machine could not have carried out its atrocities without willing female accomplices. This programme examines the 'Nazi Woman' through a contemporary lens

A look at a perplexing metal sphere, just seven-hundredths of an inch across. Under extreme magnification, it shows two holes that have been precision drilled through it

Experts investigate the startling mysteries captured by satellites orbiting the Earth - from hidden worlds to unexplainable natural phenomena

Previously sealed documents hint at compelling new theories about extraterrestrials as experts question whether former US presidents may have been concealing the truth

The Supermarine Spitfire, a British single-seat fighter aircraft that was used by the Royal Air Force and other Allied countries before, during, and after the Second World War

A look at a perplexing metal sphere, just seven-hundredths of an inch across. Under extreme magnification, it shows two holes that have been precision drilled through it

A strange set of objects were found in the Great Pyramid in Giza, including a two-pronged bronze hook with two pins sticking into it

The team at America's largest shipwreck must remove 4,000 wrecked cars from the hull and find a way to stop them becoming an environmental disaster

With the Allies at crisis point in 1943, pressure mounted on the Wrens to prove their worth and the stage was set for a battle that would turn the tide of the Atlantic war

The myriad of rumours, theories and disputed historical accounts of Adolf Hitler's sexual psychology, exploring the impact of his alleged and proven sex life on his behaviour

Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code

A look at whether or not Area 51's notoriety acts as a cover-up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations

Marty Lagina joins Giorgio Tsoukalos to explore the statues, pyramids and structures left behind by one of the most mysterious cultures in the ancient world in Sardinia, Italy

Intelligence officers acquire the information collected by sources, from old-school 'dead drops' to high-tech digital transfers

The Nazi machine could not have carried out its atrocities without willing female accomplices. This programme examines the 'Nazi Woman' through a contemporary lens

The claims of Billy Meier who, in 1975, claimed he travelled on a beamship through space with extraterrestrial friends

Giorgio Tsoukalos explores a Polynesian land of bizarre figures and forbidden places in search of what could be the ultimate evidence of mankind's extraterrestrial origins