Sky History 2 Tuesday

Hidden government facilities and their secret operations, from a Soviet poison lab to a nuclear site under Greenland's ice and a US doomsday bunker inside a mountain

The presenter considers the riddle of the Sphinx, contemplating the suggestion that it is even older than thought

A UFO is spotted over one of the world's holiest sites, while some believe a mysterious floating spaceman in a famous photograph could be an elaborate, decades-long hoax

A serpentine monster said to be lurking under the water of the River Thames. Plus, UFOs spotted crossing the moon

In 1943, Germany fell at Stalingrad, its first major defeat. In the Pacific, Japan lost momentum after the US won at Guadalcanal

In 1944, D-Day pierced the Atlantic Wall, as Operation Bagration crushed the Wehrmacht in the East. Plus, the fall of the Third Reich began

Compilation of the most compelling mysteries featured on the Ancient Aliens series, here focusing on evidence of ancient flying machines

Reported accounts of alien encounters, hearing from people who believe that beings from other worlds have the means to control humanity

Tony Robinson embarks on expeditions through some of Britain's most historic landscapes, starting with a 40-mile walk along the Derwent Valley in the Peak District

Alice Roberts visits more archaeological digs, including a spectacular monument older than Stonehenge, a 200-year-old mine trapped in time and a lost medieval friary

Hidden government facilities and their secret operations, from a Soviet poison lab to a nuclear site under Greenland's ice and a US doomsday bunker inside a mountain

The presenter considers the riddle of the Sphinx, contemplating the suggestion that it is even older than thought

A UFO is spotted over one of the world's holiest sites, while some believe a mysterious floating spaceman in a famous photograph could be an elaborate, decades-long hoax

A serpentine monster said to be lurking under the water of the River Thames. Plus, UFOs spotted crossing the moon

In 1943, Germany fell at Stalingrad, its first major defeat. In the Pacific, Japan lost momentum after the US won at Guadalcanal

In 1944, D-Day pierced the Atlantic Wall, as Operation Bagration crushed the Wehrmacht in the East. Plus, the fall of the Third Reich began

Examining the plausibility of apocalyptic prophecies throughout history. This edition focuses on Isaac Newton's obsession with alchemy and biblical prophecies

An investigation into the plausibility of apocalyptic prophecies throughout history

Compilation of the most compelling mysteries featured on the Ancient Aliens series, here focusing on evidence of ancient flying machines

Reported accounts of alien encounters, hearing from people who believe that beings from other worlds have the means to control humanity

Tony Robinson embarks on expeditions through some of Britain's most historic landscapes, starting with a 40-mile walk along the Derwent Valley in the Peak District

Alice Roberts visits more archaeological digs, including a spectacular monument older than Stonehenge, a 200-year-old mine trapped in time and a lost medieval friary

Andy McGrath returns to Cornwall, where he meets a real-life mermaid, stalks a local churchyard for owl men and faeries, and stops off at a haunted smugglers' inn

Avery struggles to finish the Manta in time for it to be painted, and Connor ties the knot in Rust Valley's biggest event of the year

The actor investigates daring government operations, revealing uncensored evidence and the lengths to which elite operatives have gone to complete missions