Sky History2

The mysterious keyhole symbol exists in mystic texts, sacred architecture and artwork found around the globe. Is there more to it than meets the eye.

A look at Raoul Moat's shooting spree in Northumberland during the summer of 2010, the huge manhunt that followed and the aftermath of his attacks.

Dive into the 'game changing' ships that turned the tide of war and made history, from the grand USS Constitution to the small and speedy CMB-4.

The mighty North American twin delivered the first blow in the fight back against Japan, in one of the most daring and audacious raids of all time.

Throughout the world, ancient objects have been found that leave archaeologists at a loss. What do they reveal about the world we live in today.

The mysterious keyhole symbol exists in mystic texts, sacred architecture and artwork found around the globe. Is there more to it than meets the eye.

What if every human on Earth disappeared? Discover what would happen to the world we have created, including our animals, buildings, landscape and bodies.

What would happen to Earth if all humans vanished? Outbreak examines the possibility of escaped animals, invasive vines and a deadly virus taking over control from humans.

What would happen if all humans vanished? Would LA's palm trees spark a huge inferno? What would become of New York? And which animals would take control from man.

If people disappeared from Earth, what would happen to metallic objects? Would bridges and buildings collapse? And what would become of the US's secret stash of gold.

In a world void of people, pythons begin to challenge alligators for control of the Everglades. Elsewhere, Shanghai sinks under the weight of its empty skyscrapers.

In 1955, a family of seven in Kentucky fired their guns on an alleged alien attack. But what did they really see.

Caroline Roberts, one of the surviving victims of serial killers Rose and Fred West, is among those revisiting the couple's horrific 1970s murder spree.

A look at the case of estate agent Suzy Lamplugh, who showed a client round a house in Fulham in July 1986 and was never seen again. Dermot Murnaghan hosts.

The world had largely ignored the growing threat of Nazism during the late 1930s and now the appeasement of Hitler was about to have terrible consequences.

This is the story of that battle, during which a handful of young pilots faced and eventually defeated the might of Goering's bombers.

Throughout the world, ancient objects have been found that leave archaeologists at a loss. What do they reveal about the world we live in today.