Sky History 2 Wednesday

Investigating whether hilltop spirits, which some through time have believed to inhabit mountains, could have been extraterrestrials

The Egyptian obelisks identied as monuments to the pharaohs. Ancient astronaut theorists suggest they may have served a technological purpose

Professor Alice Roberts explores the medieval history of Lincoln, visiting the cathedral that was once the world's tallest building

Over 50 years on, Laurence Fishburne reveals, how new evidence and technology may finally be able to crack the Zodiac Killer's code and reveal his identity

A Messerschmidt 'Gigant', the biggest aircraft to fly in the Second World War. Its wreckage was discovered by Italian divers in January 2012

Experts investigate stories of a French church that supposedly contains a gateway to another universe and an alien library believed to be hidden underneath the Great Sphinx of Giza

Ancient astronaut theorists explore the idea that meteorites could be pieces of extraterrestrial technology

The development of the original form of combat - melee. Over time, short-range instruments of battle have evolved, from the short sword to Exoskeletons

The story of the Siege of Leningrad told from the Russian perspective. The defence of the city lasted from September 1941 to January 1944 and more than a million civilians died

The conspiracy theories surrounding a UFO sighting in Mexico in 1974. It was reported the object was lost over Coyame, but shortly afterwards a civilian plane crashed nearby

Experts hope to unlock the secrets of the golden city of El Dorado by examining a 10in-long statue that may hold the key to the lost Amazonian civilisation

Mikey Kay and Garth Baldwin launch an investigation to solve to 700-year-old mystery of the Middle Ages' most powerful and secretive military force, the Knights Templar

How new technology is allowing people to be able to explore oceans and deep lakes more than ever before

Experts seek a lost garden planted in 1592 as part of a three-day party commemorating the defeat of the Spanish Armada, an event attended by Elizabeth I

Alice Roberts explores Edinburgh and its role in the union between England and Scotland, as well as the story of Burke and Hare, and how it influenced British medical law

A walk through India's Taj Mahal, the iconic mausoleum complex commissioned in 1632 by the Mughal emperor Shah Jahan to house the remains of his beloved wife

Calls to reinvestigate the suspicious death of King Ludwig of Bavaria in 1886, who died three days after he was declared insane and deposed from the throne

How, in December 1941, after the Einsatzgruppen's intervention, Romania, Bulgaria, Hungary and the Baltic states are declared 'Judenfrei' - that is, free of Jews

Experts investigate stories of a French church that supposedly contains a gateway to another universe and an alien library believed to be hidden underneath the Great Sphinx of Giza

Ancient astronaut theorists explore the idea that meteorites could be pieces of extraterrestrial technology

Experts seek a lost garden planted in 1592 as part of a three-day party commemorating the defeat of the Spanish Armada, an event attended by Elizabeth I

Experts take a look at the weapons dominating from the skies, focusing on the operating principles of arrows, rockets, and bombs

The presenter explores how coveted religious artifact the Ark of the Covenant could just disappear and whether it is possible that it could ever be found

First-hand accounts from seasoned, decorated police officers who have had unbelievable but substantiated UFO encounters