Sky History 2 Wednesday

Theorists ask whether a currently unidentified species represented in human DNA could be a result of breeding between man and alien in the distant past

Expert investigations into the possibility that reptilian aliens are more than a pop-culture creation and a favourite of works of science-fiction

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

Former staff of top-secret facility Hangar 18 in Dayton, Ohio, reveal stories of mysterious activity at the base, including alien bodies, flying saucer debris and cryonic chambers

The tale of orphans living in the Sri Lankan town of Navalady at the time of the 2004 tsunami, and how they miraculously escaped being engulfed by the huge wave

Theorists ask whether a currently unidentified species represented in human DNA could be a result of breeding between man and alien in the distant past

Expert investigations into the possibility that reptilian aliens are more than a pop-culture creation and a favourite of works of science-fiction

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

It's believed the Knights Templar owned vast swathes of land, commanded fleets, and lent money to kings. This documentary seeks to separate the facts from the fiction

A mysterious UFO over Chile. Plus, the deep-sea dive that plunged a research vessel into the heart of an underwater lake of death

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

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

The secret underground pathways of Scotland that reveal the degree of sophistication of the culture 700 years ago, when William Wallace fought for the country's independence

Craig joins forces with journalist Sarah Cruddas to investigate some perplexing UFO encounters. Here the duo recall the infamous Rendlesham Forest incident of 1980

During the Second World War, the Nazi war machine ran death camps. In Poland, a group of Jews escaped and helped bring the story of the Holocaust to the rest of the world

Rick, Marty and Matty join the treasure-hunting family of the late Mel Fisher in Key West, Florida, to search for millions in emeralds from the legendary Atocha shipwreck

Alice Roberts and Brett Lockyer examine the cause of death of George IV, an overweight monarch who enjoyed drinking, partying and spending money

An investigation into compelling UFO and alien cases by opening previously off-limits secret files. Does the mysterious Blue Planet Project hold the answers?

Theorists ask whether a currently unidentified species represented in human DNA could be a result of breeding between man and alien in the distant past

Expert investigations into the possibility that reptilian aliens are more than a pop-culture creation and a favourite of works of science-fiction

Part two of two. Documentary revisiting the alleged crash of an extra terrestrial craft at Roswell, New Mexico in 1947

A mysterious UFO over Chile. Plus, the deep-sea dive that plunged a research vessel into the heart of an underwater lake of death

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

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

Investigations into whether ancient tales of beings with super-human powers could be inspired by extra- terrestrials who came to Earth in the past