Cutting-edge technology gives an insider's look at the subterranean city built within Churchill's secret bunkers during the Second World War.

Lue Elizondo uncovers an exclusive video, sparking an investigation into possible connections to the USSR - and the threat posed by UFOs to our planet.

Green Beret Terry Schappert examines history's greatest warriors. Discover how a defiant Saxon defence withstood the might of the Viking fleet at the Battle of Maldon.

The Marianas Trench is the deepest place on earth. Follow a mission into the abyss and explore the geology that has created this deep scar along the ocean floor.

It is a story told in more than twelve hundred cultures around the world: the gods sent a great flood to wipe out humanity for its disobedient and wicked ways.

They ruled over much of Europe and Asia during the Dark Ages, building stadiums, aqueducts and cathedrals. But the Byzantines' success became their downfall.

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.

Shocking footage reveals the horrors of the worst hurricane in US history, as well as the monstrous earthquake that claimed countless lives in Haiti.

Cutting-edge technology gives an insider's look at the subterranean city built within Churchill's secret bunkers during the Second World War.

Lue Elizondo uncovers an exclusive video, sparking an investigation into possible connections to the USSR - and the threat posed by UFOs to our planet.

Green Beret Terry Schappert examines history's greatest warriors. Discover how a defiant Saxon defence withstood the might of the Viking fleet at the Battle of Maldon.

The Marianas Trench is the deepest place on earth. Follow a mission into the abyss and explore the geology that has created this deep scar along the ocean floor.

It is a story told in more than twelve hundred cultures around the world: the gods sent a great flood to wipe out humanity for its disobedient and wicked ways.

They ruled over much of Europe and Asia during the Dark Ages, building stadiums, aqueducts and cathedrals. But the Byzantines' success became their downfall.

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.

Shocking footage reveals the horrors of the worst hurricane in US history, as well as the monstrous earthquake that claimed countless lives in Haiti.

Cutting-edge technology gives an insider's look at the subterranean city built within Churchill's secret bunkers during the Second World War.

Lue Elizondo uncovers an exclusive video, sparking an investigation into possible connections to the USSR - and the threat posed by UFOs to our planet.

Green Beret Terry Schappert examines history's greatest warriors. Discover how a defiant Saxon defence withstood the might of the Viking fleet at the Battle of Maldon.

The Marianas Trench is the deepest place on earth. Follow a mission into the abyss and explore the geology that has created this deep scar along the ocean floor.

It is a story told in more than twelve hundred cultures around the world: the gods sent a great flood to wipe out humanity for its disobedient and wicked ways.

They ruled over much of Europe and Asia during the Dark Ages, building stadiums, aqueducts and cathedrals. But the Byzantines' success became their downfall.

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.

Shocking footage reveals the horrors of the worst hurricane in US history, as well as the monstrous earthquake that claimed countless lives in Haiti.

It has been rebuilt more than 20 times since his death, but what was Jesus' Jerusalem really like?

The team investigates an alarming pattern of UFOs allegedly appearing near US Air Force bases.

Terry Schappert examines the Germanic tribes of 9 AD. Confronted by the vast Roman army, what factors enabled them to defeat their mighty foe on the battlefield?

the colossal blast that destroyed the island of Krakatoa in August 1883. What could have caused it?

Stories of civilisations large and small disappearing without a trace can be found throughout history and across the globe.

Intriguing series examining theories of how the world end with scientist Trevor S. Valle looking at topics from being swallowed by a black hole, bombed by meteorites or alien attack.

Be amazed by the factories of yesteryear, which forged enough iron to equip a Roman army and made thousands of chariots to take the ancient Egyptians to war.

Bobby checks out the world of Southern fried food, exploring catfish and alligator farms and extracting frying oil from lint-covered cottonseed.

It has been rebuilt more than 20 times since his death, but what was Jesus' Jerusalem really like?