Sky History 2 HD Monday

Experts investigate whether the US military has a secret space programme, as well as evidence suggesting alien races have been in conflict for millennia

Archaeological finds across the east of Britain including divers searching the Thames for clues to a 17th-century tragedy and a metal detectorist making the discovery of a lifetime

Kevin embarks on a challenging dive in the Atlantic Ocean to explore a battleship that saved the Northern Navy in the American Civil War

The comedian meets up with Germany's self-appointed comedy ambassador to the UK, Henning Wehn, to pick through the bad blood between the two nations

The presenter is joined by Bruno Tonioli to look at key battle tactics during the Roman Invasion - such as the complexity of firing a catapult

A look at suggestions that extraterrestrials could be altering human DNA and repopulating the Earth with alien-human hybrids