Sky History 2 Sunday

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 story of Second World War spymistress Vera Atkins, who led agents including Violette Szabo and Yvonne Baseden

While Europe rejoiced over victory in the Second World War, spymistress Vera Atkins worked hard to determine the whereabouts - or fates - of her agents

The role the Wrens played in preventing Dönitz's most U-boat commanders succeed in their quest to send as many British merchant ships to the bottom of the sea as possible

Alice Roberts examines a gatehouse riddled with Civil War bullets, a unique Iron Age shield made from bark, and Roman burials with pots where the heads should be

Alice Roberts examines a Dutch ship sunk by the English, a Cornish Roman fort and a 5,000-year-old Neolithic monument

A visit to the Isle of Lewis in the Outer Hebrides, home of the 5,000-year-old standing stones of Callanish, traditional Scottish blackhouses and cut peat

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

In the Philippines, archaeologists discover the remains of an ancient rhinoceros. Elsewhere, a Brazilian island is infested with thousands of vipers

In the north-western Pacific, a tourist stumbles across a mysterious structure. Elsewhere, an unsettling sight is revealed on the island of New Guinea

CGI reconstruction of the Second World War Pacific battle of Midway, and how American aircraft carriers Enterprise, Yorktown and Hornet turned the tide in favour of the Allies

Tori Herridge and a team of scientists attempt to piece together the story behind the remains of children and teenagers that were discovered beneath a Leeds shopping arcade

Patterns in UFO and UAP sightings across the world. A strange formation is seen in the sky over the sleepy suburbs of Tinley Park, Illinois

The Allies continued to push from the west to Berlin, while survivors recount the horrors behind finding Germany's concentration camps

The war in the Pacific nears its violent end as a drastic tactic triggers the nuclear age, and the brave men share their thoughts behind the tragic events

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 infamous Beer Hall Putsch, an attempt by Adolf Hitler to take power in Germany by force. It was a day that would change the world for ever, birthing Hitler's regime

The Nazis' growing influence in Europe after the First World War. The seeds were sown as a clash of right-wing and left-wing politics caused strife in Germany

Craig and Sarah Cruddas examine the Chicago International Airport O'Hare case of November 2006 - a mass sighting of a flying saucer hovering over a United Airlines airport gate

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

TV personality Bobby Berk stops by the shop to challenge the artists to create glass art centrepieces for a dining room table

The remaining competitors are tasked to design a perfume bottle with a sculpted stopper and render it in two sizes

The Apollo 11 mission to the moon and the suggestion that the moon is actually a giant spacecraft allowing extraterrestrials to monitor Earth