Sky History 2 HD Wednesday

The Apollo 11 mission to the moon and the suggestion that the moon is actually a giant spacecraft allowing extraterrestrials to monitor Earth

Startling evidence suggesting that the Ancient Maya conspired with aliens, as experts hypothesise that they acquired extraterrestrial knowledge of astrology

Efforts to locate U-Boats sunk in the Caribbean Sea take an unexpected turn as an aged eyewitness offers a tip that changes the course of his entire investigation

On the volcanic island of Kolombagara, explorers uncover a mysterious man-made cave in the dense jungle. In Vietnam, bones from an unknown animal are found

The part the tractor played in helping farmers to harvest crops and get food on American tables

Some of the most iconic sacred temples are built on ruins of structures far more ancient. This episode examines the factors compelling early humans to rebuild in the same places

Experts question what probes on Mars may have found over the past 40 years, asking if Nasa could be hiding proof of life on the Red Planet from the public

Madness frontman Suggs and militaria expert Stephen Taylor hunt for souvenirs left by flying ace Douglas Bader and the legendary Duxford Fliers

Tony Robinson embarks on a towpath exploration of industrial engineering along the Leeds and Liverpool Canal, tracing the story of its chaotic construction

Divers Fabien and Céline Cousteau investigate one of the most credible UFO sightings in history - a strange alien craft seen crashing into the ocean

How Constantine I became the first Christian Emperor, allowing the religion to spread through Europe and thus have a profound impact on the course of Western civilisation

On the volcanic island of Kolombagara, explorers uncover a mysterious man-made cave in the dense jungle. In Vietnam, bones from an unknown animal are found

Forest fires threaten Rust Valley and after his neighbour loses 350 cars, Mike hoards back fuel in case he needs to save his own collection

The revolutionary war gaming tactics to defeat Admiral Karl Dönitz and his Wolf Pack fleets of U-boats in the Battle of the Atlantic during the Second World War

Aeroplane pioneers and how before planes were even a possibility, a rivalry brewed as two young dreamers envisioned a future where millions of people could be ferried overseas

A look at UFO sightings, terrifying abductions and other bizarre occurrences, casting new light on historic cases

The legendary Ohio Grassman is apparently captured in footage of a tall, dark-coloured, hairy creature walking through woods

Dr Fern Riddell and Dr Karen Bellinger examine the Holy Grail, an object of mystery and fascination traditionally thought to be the cup that Christ drank from at the Last Supper

Some of the most iconic sacred temples are built on ruins of structures far more ancient. This episode examines the factors compelling early humans to rebuild in the same places

Experts question what probes on Mars may have found over the past 40 years, asking if Nasa could be hiding proof of life on the Red Planet from the public

Forest fires threaten Rust Valley and after his neighbour loses 350 cars, Mike hoards back fuel in case he needs to save his own collection

Terry Schappert examines how Saxons withstood an attack from a Viking fleet during the Battle of Maldon in 991

How Constantine I became the first Christian Emperor, allowing the religion to spread through Europe and thus have a profound impact on the course of Western civilisation

Divers Fabien and Céline Cousteau investigate one of the most credible UFO sightings in history - a strange alien craft seen crashing into the ocean

Investigating cosmism - a belief that human civilization originated in the cosmos. This train of thought is widely held throughout Russia