Sky History 2 HD Tomorrow

Experts investigate mysterious beings with big heads and eyes, whose images were found carved into rocks. Known as the 'greys', they are rumoured to be alien life forms

Experts analyse whether natural causes were responsible for the volcanoes, earthquakes and floods of ancient times - and the possibility that it was down to aliens

A lifelong escape artist, Forrest Tucker, became an inmate of San Quentin prison. In 1979, despite his advanced age, he managed to engineer an audacious prison break

Helen Skelton and Alex Langlands head to a Cheshire dig where archaeologists have dug up human skeletons that reveal secrets about life during the Black Death

The story of the submarine and their role in naval warfare, from early beginnings in the American War of Independence to the modern day

Experts investigate mysterious beings with big heads and eyes, whose images were found carved into rocks. Known as the 'greys', they are rumoured to be alien life forms

Experts analyse whether natural causes were responsible for the volcanoes, earthquakes and floods of ancient times - and the possibility that it was down to aliens

The gripping narrative of a determined prisoner's quest for freedom from one of Mississippi's oldest and most notorious prison farms

Helen Skelton and Alex Langlands explore the history of Stonehenge, examining the stones that make up the structure, their acoustic properties, and how they were transported

A CGI reconstruction of the Second World War battle of Santa Cruz, in which the USS Hornet was sunk and her sister ship the USS Enterprise suffered heavy casualties among the crew

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

How Hitler's ambitious plan for a new Germany, full of architectural wonders, would have dramatically changed the country had the Second World War ended differently

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

Mysterious satellite images reveal China's hidden terror camps and provide access to America's top secret apocalypse pyramid

Allen Haff and Ton Jones investigate one of America's oldest storage facilities, where they uncover a whaling harpoon and a rare US flag

Allen Haff and Ton Jones discover a Second World War tank barrel after outbidding the competition in Worcester, Massachusetts

The actor is joined by astrophysicist Sarah Cruddas to scrutinise an 2016 event in the village of Pentyrch, south Wales involving a vast triangular UFO and the RAF

Al faces up to the richest nation on Earth to discover how the former British colony of America somehow slipped through its fingers, joined by guest Reginald D Hunter

Most people agree that vampires are fictional creatures, but as this programme reveals there have been cases of people who thirst for blood

Experts investigate mysterious beings with big heads and eyes, whose images were found carved into rocks. Known as the 'greys', they are rumoured to be alien life forms

Experts analyse whether natural causes were responsible for the volcanoes, earthquakes and floods of ancient times - and the possibility that it was down to aliens

The mysterious Arizona desert cypher, the lair of the war elephant and a trip to a 'zombie' village

A CGI reconstruction of the Second World War battle of Santa Cruz, in which the USS Hornet was sunk and her sister ship the USS Enterprise suffered heavy casualties among the crew

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

How Hitler's ambitious plan for a new Germany, full of architectural wonders, would have dramatically changed the country had the Second World War ended differently

Experts investigate the work of Nasa and secret government files relating to extraterrestrial activity, looking for proof of alien contact in the recent or distant past