Sky History 2 Friday

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

Investigations into the possibility that sightings of alien beings or UFOs may actually be evidence of time travellers from the future

The documentary concludes with a look at a 1943 crash in Gibraltar, which killed Polish Prime Minister in exile Wladyslaw Sikorski

The SS Rex, an Italian ocean liner launched in 1931. She held the westbound Blue Riband between 1933 and 1935 and later saw action in the Second World War

How the bombing of Tokyo demonstrated the power of the B-29 bomber. The cost of creating this machine exceeded that of the Manhattan Project, which developed the first atomic bomb

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

Experts make surprising discoveries as they explore the ancient past for evidence of alien overseers

Madness frontman Suggs and militaria expert Stephen Taylor visit Little Staughton in Cambridgeshire, the location of a former Pathfinders Force airbase

Dan Jones heads to Gwynedd to explore the history of Caernarfon Castle, the military importance of which faded at the end of the 15th century when Henry Tudor became king

Alice Roberts explores the history of Oxford during the Civil War, when the city became a power base for the royalist forces and a rival capital for nine years of conflict

From bustling ports and strategic forts, to cultural quirks and cathedrals of commerce, this episode tells the story of the United States through 12 key sites

The fate of the SS Cap Arcona, a former luxury ship turned prisoner transport vessel that became the target of an RAF squadron attack

Ted looks back over his first year in business and the team prepares the station for a big open house to cap off the year

Documentary in which experts examine previously undiscovered evidence of flaws in the Titanic's design that may have contributed to the ship sinking in April 1912

Farmer Edwin Fuhr recalls harvesting crops when he saw a metal object hovering in his field. Almost immediately, four identical objects appeared

Cousins Billy and John Smith recall driving in separate cars when they encountered a massive mothership three times the size of a football stadium

Craig joins forces with journalist Sarah Cruddas to investigate some perplexing UFO encounters. Here the duo recall the infamous Rendlesham Forest incident of 1980

The twisted origin stories of some of history's most diabolically creative, and brutal, torture devices - from the 'Iron Maiden' to the pear of anguish

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

Experts make surprising discoveries as they explore the ancient past for evidence of alien overseers

Ted looks back over his first year in business and the team prepares the station for a big open house to cap off the year

A look at why the Celts moved from prosperous cities into smaller fortified settlements and how this triggered their decline in Central Europe

From bustling ports and strategic forts, to cultural quirks and cathedrals of commerce, this episode tells the story of the United States through 12 key sites

Alice Roberts explores the history of Oxford during the Civil War, when the city became a power base for the royalist forces and a rival capital for nine years of conflict

Ancient astronaut experts examine whether the minds of Einstein and Galileo could have been superhuman and explore extraterrestrial connections with the historical figures