Sky History 2 HD Thursday

Investigating 'The Nine' - an alleged federation of extraterrestrial beings who some believe monitor and influence mankind

The Eisenhower Briefing Document, advising President-elect Dwight Eisenhower about top-secret scientists and government officials tasked with investigating reports of UFOs

Events of 1933 and 1934 when President Hindenburg signed a decree in 1933 that suspended freedom of speech and the first concentration camps for political opponents were set up

Though the Admiralty were convinced the Allies had the expertise to defeat Germany, Gilbert Roberts and the Wrens started devising wargaming tactics to combat U-boat formations

While Europe rejoiced over victory in the Second World War, spymistress Vera Atkins worked hard to determine the whereabouts - or fates - of her agents

Investigating 'The Nine' - an alleged federation of extraterrestrial beings who some believe monitor and influence mankind

The Eisenhower Briefing Document, advising President-elect Dwight Eisenhower about top-secret scientists and government officials tasked with investigating reports of UFOs

Strange black holes appear near Egypt's pyramids, ruins in Peru suggest the Incas knew more than may be imagined, and a mysterious red swarm invades a beach in India

A giant carving of a strange creature appears in the Australian Outback, and strange bright green lights illuminate the seas around Thailand

A buried monument offers new evidence about a huge Biblical mystery. A giant shadow engulfs the Pacific Ocean, and strange circular lake is home to unearthly life

A sinister giant swastika that appeared in a forest in Germany. Plus, mysterious markings spotted in an isolated corner of Antarctica - how did they get there?

Satellite images reveal how El Chapo escaped from a high security prison in Mexico. Plus, a giant black stain appears in a war-torn area of Iraq

An examination of several seemingly impossible things 'caught on film', including a witch's broomstick 'floating' in mid-air. Plus, fossilised footprints found in Texas

Though the Admiralty were convinced the Allies had the expertise to defeat Germany, Gilbert Roberts and the Wrens started devising wargaming tactics to combat U-boat formations

Assigned to the British War Crime Investigation Unit in post-war Germany, British spy boss Vera Atkins pursued her agents' fate. She eventually hunted down a Nazi mastermind

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

The role that planners, designers, architects and builders played in shaping the Second World War, thus helping Adolf Hitler retain power, starting with Albert Speer

Investigating 'The Nine' - an alleged federation of extraterrestrial beings who some believe monitor and influence mankind

The Eisenhower Briefing Document, advising President-elect Dwight Eisenhower about top-secret scientists and government officials tasked with investigating reports of UFOs

Giorgio Tsoukalos draws on evidence from past series as he further questions whether inventor Nikola Tesla was communicating with extraterrestrials

Hugh Dennis and the team dig up the gardens of Beningbrough Hall in Yorkshire, in search of a vanished building - the only evidence of which lies in a painting

Alice Roberts examines a gatehouse riddled with Civil War bullets, a unique Iron Age shield made from bark, and Roman burials with pots where the heads should be

Strange relics forgotten by time, including familiar stone monoliths in Colombia, a lost city in Sierra Nevada and ancient ruins in Greece and Malta

In Alberta, Scott and Sheldon visit 84-year-old Archie, whose property is filled with farm machinery and unique sculptures, including an unusual homemade cannon

Investigating claims that China, with its history of technological advancement and isolationism, could have been the home of alien beings