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Ancient Astronaut theorists suggest that China, with its history of technological advancement and isolationism, could have been the home of alien beings.

Experts question if Cloud computing represents the rediscovery of an ancient repository of knowledge known as the Akashic Record.

Giorgio Tsoukalos draws on evidence from past series as he asks whether aliens introduced the Greeks and Egyptians to electricity.

Hugh and the team search for the remains of a Norman motte and bailey castle in the suburb of West Derby and uncover gems in the residents' gardens.

Mystery Shipwreck and a Roman Army Camp: Alice Roberts reveals a Dutch ship sunk by the English, a Cornish Roman fort and a 5,000-year-old Neolithic monument.

Face bizarre sights: a spinning island in Argentina, a desert triangle, Ethiopia's colourful pools and a giant figure in Australia's outback.

The guys are in Ontario and think they've hit the jackpot - first stop is a sprawling property with so many outbuildings it could double as a village.

Experts investigate startling evidence suggesting that the Ancient Maya conspired with aliens. Was this how they acquired their knowledge of astrology.

Experts scrutinise the Maya Calendar, which predicted the world would end in 2012. Could it have anticipated the arrival of an extraterrestrial god.

During WWII, the French Resistance seeks aid from SOE. Led by Vera Atkins, Odette Sansom and Noor Inayat Khan fight the Nazis, risking it all for victory. (1 of.

With Allied victories and the liberation of Paris following D-Day, Vera is in a race against time to locate her missing agents.

World War II breaks out and a force of U-boats attempt to starve Britain into submission. Meanwhile, Vera Laughton Mathews recruits talented women into the Wrens.

Another visit to the north for Alice, checking out evidence of early writing by the Picts in Scotland and a 3,000-year-old Bronze Age coffin.

Excavations in southern England uncover a lost Roman town, a Tudor ship and evidence of Henry VIII's financial forgery at the Tower of London.

Arthur's Stone and a Georgian Mine: In the west of the UK, explore a spectacular monument older than Stonehenge, a 200-year-old mine trapped in time and a lost medieval friary.

Experts investigate startling evidence suggesting that the Ancient Maya conspired with aliens. Was this how they acquired their knowledge of astrology.

Experts scrutinise the Maya Calendar, which predicted the world would end in 2012. Could it have anticipated the arrival of an extraterrestrial god.

A chronological telling of the dramatic D-Day story, focusing on the vessels that made the landings possible.

From the trench to the home front hospital, a medical historian retraces the train journey made by wounded soldiers during World War I.

The story of one American GI and how he and his Harley motorbike became a legend.

Attila, king of the Huns, faces strongman of the Roman Empire, Generalissimo Aetius. But their terrible battle ends in a bloodbath, with no clear victory.

The Battle of Sekigahara saw Tokugawa Ieyasu emerge victorious over his rival Ishida Mitsunari, uniting the country under the Tokugawa shogunate.

The defeat at Stalingrad in 1943 was the turning point of the war and convinced the Nazi leadership to intensify their terror and propaganda campaigns.

In 1945, WWII was over but the violence had not ended. The survivors want to blame the Germans. The reckoning with National Socialism is ambivalent.

Experts investigate startling evidence suggesting that the Ancient Maya conspired with aliens. Was this how they acquired their knowledge of astrology.