TV Guide for Today Saturday 11 in Sky History 2

Ancient Astronaut Theorists investigate how ancient aliens may have helped to guide and define mankind in the remote past.

It is likely that aliens exist in a universe as large as ours. How would they navigate those vast distances and potentially visit us on earth.

Close encounters come in many different forms, from sightings to abductions. Meet the real people who have experienced alien life up close.

Exploring why the Celts moved from prosperous cities into smaller fortified settlements and how this triggered their decline in Central Europe. (3 of.

Dr Alice Roberts explores the biggest collection of Roman writing tablets. A fort scattered with human skulls provides evidence of Caesar's invasion.

Nubian pyramids reveal the rise of female power in Ancient Kush, while satellite images uncover secrets of an ancient Puebloan site in New Mexico.

A real Diamond T truck build has Mike and his crew scrambling to keep up with their client demands.

The Mutual UFO Network is devoted to the scientific investigation of UFOs. With more than five decades of investigations, MUFON's database could contain proof.

Meteor impacts have created the perfect environment for humankind. Could new evidence reveal that celestial objects have been sent by an alien intelligence.

The Wooden Wonder: The fascinating story behind the stunning wooden aircraft, which undertook some of the most daring and iconic raids of WWII. (6 of.

The mighty Flying Fortress takes to the air as we examine the background and development of one of WWII's most iconic bombers.

Viking Camp and Iron Age Gold: Dr Alice Roberts explores the most exciting finds from West Britain. Iron Age gold in Britain is unearthed and a Viking camp is discovered.

Dr Alice Roberts uncovers some incredible finds from North Britain, including Scottish man-made islands that help paint a picture of Stone Age tech.

Andy heads to the home of palaeontology on the Jurassic Coast and braves the collapsing cliffs of Lyme Regis to bring back one of its many fossils.

Andy visits Britain's oldest shop, drinks coffee with a corpse and discovers a 19th-century time machine hidden in an urban cemetery.

The Mutual UFO Network is devoted to the scientific investigation of UFOs. With more than five decades of investigations, MUFON's database could contain proof.

Meteor impacts have created the perfect environment for humankind. Could new evidence reveal that celestial objects have been sent by an alien intelligence.

Vera finds out her agents' fate. Her beliefs about Noor are challenged. Suspicions lead Vera to hunt down a Nazi mastermind.

Himmler's desire to unearth the true origins of humanity led to an attempt to prove the Paleolithic past of Germany's Aryan race.

Hours before the D-Day landing, a small group of American paratroopers were dropped behind enemy lines with a vital mission.

The Siege of Paris by the Vikings: Journey back to 885, when a small army in Paris repelled the Vikings, who had ravaged everything in their path while travelling up the Seine.

Hannibal V. Rome: Examine how the strategy of encirclement devised by Hannibal left 50,000 Romans dead on the battlefield of Apulia on August 2, 216 BC.

In the wake of the First World War, Adolf Hitler identifies Benito Mussolini as his model and has one ultimate goal: to gain power in Germany.

Hitler appears to be eliminated after his failed putsch in 1923. Discover how the Nazi movement used democracy's tolerance in Germany to come back.

The Mutual UFO Network is devoted to the scientific investigation of UFOs. With more than five decades of investigations, MUFON's database could contain proof.

Meteor impacts have created the perfect environment for humankind. Could new evidence reveal that celestial objects have been sent by an alien intelligence.

Revelation is the most terrifying book in the Bible, describing mankind's final days. But who will survive God's wrath? And when will it happen.

In 1994, a secret manuhidden in the Vatican revealed a previously unknown apocalyptic prophecy accredited to Nostradamus. Where did it come from.

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.