Sky History 2 Wednesday

Investigations into the possibility that sightings of alien beings or UFOs may actually be evidence of time travellers from the future

Theorists investigate a depiction of a stegosaurus found at Angkor Wat in Cambodia, comtemplating whether it suggest that alien species killed off the dinosaurs

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

How the Nazis' decision to take on a second ideological war in their racist quest to realise the Aryan ideal led to the death of millions

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth - from hidden worlds to unexplainable natural phenomena

Investigations into the possibility that sightings of alien beings or UFOs may actually be evidence of time travellers from the future

Theorists investigate a depiction of a stegosaurus found at Angkor Wat in Cambodia, comtemplating whether it suggest that alien species killed off the dinosaurs

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

Tony Robinson embarks on a five-day expedition along Dorset's Jurassic coast to explore the county's role in protecting Britain from invasion during the Second World War

How the Nazis' decision to take on a second ideological war in their racist quest to realise the Aryan ideal led to the death of millions

A look at the tactics employed to pass strategically important ships under the nose of the enemy, and the use of intelligence to carry out naval attacks

A look at the possible reasons a flock of blackbirds plunged to their death in Mexico. Plus, whether a ghostly phantom is confirmation of a Filipino ghost legend

Aerial archaeologists battle to solve the mystery of the Mayan Empire collapse. Plus, the horrors of the communist lake of death

Craig and space journalist Sarah Cruddas turn their attention to reports of alien abductions, focusing on a case from the UK which was reported in in November 1980

A tour of some of the most significant breakthroughs in human history, from the digital revolution to the first aircraft to fly faster than the speed of sound

Rachel Parris, Ria Lina and Rick Edwards join Russell to discuss whether Albert Einstein was a genius or a controlling egomaniac

How the race to develop the first atomic bomb was seen as critical to secure world dominance

During his time in charge, Himmler made the study of runes - letters of ancient Germanic writing - obligatory for SS officers in the belief they held powers

Investigations into the possibility that sightings of alien beings or UFOs may actually be evidence of time travellers from the future

Theorists investigate a depiction of a stegosaurus found at Angkor Wat in Cambodia, comtemplating whether it suggest that alien species killed off the dinosaurs

Professor Alice Roberts visits Portsmouth to investigate the history of the Royal Navy, uncovering some uncomfortable truths behind the myth surrounding Lord Horatio Nelson

Tony Robinson walks 50 miles from Penrith to Ambleside and on to the Irish Sea at Ravenglass, exploring how the Romans conquered the Lake District

The Death Valley boulders that move on their own, the mysterious dancing lights of Brown Mountain and the incredible barefoot super-marathon runners of Mexico

A look at the possible reasons a flock of blackbirds plunged to their death in Mexico. Plus, whether a ghostly phantom is confirmation of a Filipino ghost legend