Sky History 2 HD Wednesday

Investigations into whether prophets such as Elijah and Joseph Smith communicated with a heavenly source, or came into contact with extraterrestrials

The hundreds of gigantic lines, some in the shape of animals, geometric patterns and even an alien-like being, that extend through a Peruvian desert, known as the Nazca Lines

The Queen Elizabeth, which came to an undignified end in Hong Kong Harbour after catching fire while undergoing refurbishment

The team seeks artefacts from the country's first superhighway - the Bridgewater Canal - that linked the coal mines of Worsley with Manchester and powered the Industrial Revolution

An examination of objects found on the Mary Rose and the battle-winning tactics of Admiral Nelson on HMS Victory

Investigations into whether prophets such as Elijah and Joseph Smith communicated with a heavenly source, or came into contact with extraterrestrials

The hundreds of gigantic lines, some in the shape of animals, geometric patterns and even an alien-like being, that extend through a Peruvian desert, known as the Nazca Lines

Lacking in speed and might, the SS Andrea Doria more than made up for it in beauty, but on the night of 25 July 1956 - the Italian liner met a disastrous fate

Raksha Dave and Alex Langlands search for the remains of a First World War stable at Catterick Garrison, where thousands of horses would have been housed

A team of archaeologists embarks on a quest to unearth the most treasured and famous artefact in human history - the Ark of the Covenant

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

How codes and ciphers have been used for millennia to send secret messages, hide identities and operate outside the law

Unsolved sightings of dark, triangular flying objects that occurred around the world during the 1980s and '90s

Documentary series exploring anomalies appearing on satellite images to try and get a better understanding of unexplained phenomena

The exploits of German-born US pilot Dieter Dengler, who used survival skills honed as a child to escape a secret prison in Laos during the early years of the Vietnam War

William Shatner reveals that as a new era of exploration of Mars begins, its mysteries might be close to getting solved

Mysterious industrial waste and abandoned homes are discovered in a remote part of Greenland. In Norway, strange ditches and huge mounds are found within the Arctic Circle

Experts unseal the truth about the potential aliens living and working among humans

Investigations into whether prophets such as Elijah and Joseph Smith communicated with a heavenly source, or came into contact with extraterrestrials

The hundreds of gigantic lines, some in the shape of animals, geometric patterns and even an alien-like being, that extend through a Peruvian desert, known as the Nazca Lines

Fritz Todt was the man tasked with the Nazis' engineering projects, including the autobahn and the West Wall defences. He died, mysteriously, in 1942

A team of archaeologists embarks on a quest to unearth the most treasured and famous artefact in human history - the Ark of the Covenant

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

How codes and ciphers have been used for millennia to send secret messages, hide identities and operate outside the law

The story of Travis Walton, who claims that in 1975 he was abducted and taken aboard a space ship inhabited by extraterrestrial beings