Sky History 2 HD Tuesday

An exploration of the possibility that The Book of Enoch was stricken from the Bible because it documents humanity's extraterrestrial origins

Experts explore the disappearance of civilisations throughout time and across the globe, wondering if clues left in their wake point to an otherwordly explanation

A look at the CIA's rumoured investment in psychological operations, asking if there could be an army of remote viewers watching the American public today

On 8 April 2011, the FBI declassified decades of top secret government documents for the first time. Here, experts examine the possibility of the end of the world

The history of the US presidency, hosted by the man who filled the role from 1993 to 2001. Bill looks at racism, revealing it to be a persistent issue in America

The role of U-boats in the Second World War, featuring expert analysis, first-person accounts and archive footage

More than 7,000 years ago, the ancient Sumerians established what is considered the world's first civilization. It may be possible that these powerful beings were aliens

Hindu god Shiva, the great destroyer. This programme contemplates whether the deity could have been the leader of an extraterrestrial race

The crucial role ships have played in international conflict over the past 500 years, beginning with the battleship's declining influence during the 20th century

A look at the silent threat of submarines, from tests in the River Thames, to the German's deadly U-boat attacks in the Second World War

Perplexing UFO encounters of recent times, focusing on a case in 2018 off the west coast of Ireland, in which pilots saw bizarre lights through their cockpit windows

The history of the presidents who made an impact through imagining 'what we could be, not just what we are'

The hunt begins in the Hell Creek Formation of South Dakota, with one of the greatest palaeontology discoveries ever made

Jailbreakers Timothy Vail and Timothy Morgan, murderers incarcerated at Elmira State Prison in Elmira, New York

Alice Roberts visits a secret location in the Cotswolds, which appears to be a high-status Anglo Saxon cemetery, where she finds a very precious and fragile artefact

Alice Roberts tells the story of Viking England by studying the history of York, taking part in a Viking battle and meeting the people behind a memorable archaeological find

A look at perplexing and unusual objects lying hidden away in museums, laboratories and storage rooms

Artefacts related to medieval Italian warlords and their armies of mercenaries, who provided defence for the country's city states which had great wealth but small standing armies

A grim discovery in a Swedish lake reveals shocking ancient practices and the fossil of a previously unknown mammal is found in the Canadian Arctic

More than 7,000 years ago, the ancient Sumerians established what is considered the world's first civilization. It may be possible that these powerful beings were aliens