Zombies rising from their graves, blood sucking vampires damned for eternity and humans trapped in a struggle with hell. Are these beliefs manmade or extraterrestrial origins in earthly encounters with the undead?

To mark 100 years since the end of the Great War, Suggs and Stephen excavate the site of a huge World War One transit camp at Morn Hill, outside Winchester.

The Great Pyramids of Giza have eluded astronomers and archeologists for centuries. The world's renowned Egyptologists, astronomers and engineers join forces to solve some of the long-held mysteries about the pyramids.

A revolution in engineering is making today's technology as outdated as the horse and buggy. On this episode: Lightning LS-218, the world's fastest production motorcycle; and Hyperloop, a train faster than the speed of sound

An expedition investigates controversial evidence that might confirm a history of sea monster sightings off the coast of Florida.

Gold Hunters: Legend Of The Superstition...

Closer than ever to the $200 million payday, Wayne and the team head into the heart of darkness where a cryptic find weaves an even bigger mystery.

From plague victims being buried alive to body snatchers, illegal distilleries and castle dungeons, Edinburgh's underground world has a myriad of stories to tell.

Hindu scripture describes an enormous flying creature called Garuda that shook the ground when it landed on Earth. Is it possible that this monster was actually a misinterpreted alien craft?

To mark 100 years since the end of the Great War, Suggs and Stephen excavate the site of a huge World War One transit camp at Morn Hill, outside Winchester.

The Great Pyramids of Giza have eluded astronomers and archeologists for centuries. The world's renowned Egyptologists, astronomers and engineers join forces to solve some of the long-held mysteries about the pyramids.

An expedition investigates controversial evidence that might confirm a history of sea monster sightings off the coast of Florida.

Gold Hunters: Legend Of The Superstition...

Closer than ever to the $200 million payday, Wayne and the team head into the heart of darkness where a cryptic find weaves an even bigger mystery.

From plague victims being buried alive to body snatchers, illegal distilleries and castle dungeons, Edinburgh's underground world has a myriad of stories to tell.

Hindu scripture describes an enormous flying creature called Garuda that shook the ground when it landed on Earth. Is it possible that this monster was actually a misinterpreted alien craft?

To mark 100 years since the end of the Great War, Suggs and Stephen excavate the site of a huge World War One transit camp at Morn Hill, outside Winchester.

The Great Pyramids of Giza have eluded astronomers and archeologists for centuries. The world's renowned Egyptologists, astronomers and engineers join forces to solve some of the long-held mysteries about the pyramids.

A revolution in engineering is making today's technology as outdated as the horse and buggy. On this episode: Lightning LS-218, the world's fastest production motorcycle; and Hyperloop, a train faster than the speed of sound

In the Pacific Northwest, an investigative team searches for evidence of Sasquatch on Vancouver Island, where Native Americans once told tales of an ape-like beast that would steal children away.

A team of Americans attempts to solve one of the great mysteries of World War II. With the help of an eyewitness, they explore a mountain in the Philippines where Japanese general Yamashita is believed to have buried a vast treasure during the war.

The castles and dungeons of the Hittites are hidden beneath the sandy lunar landscape of Cappadocia. Why did this ancient empire fall?

Superhuman strength, supernatural powers and the ability to fly. If mythical gods really did exist, were they, as ancient astronaut theorists believe, extraterrestrial beings? Are these accounts tall tales, or could they be based on factual events?

Gold Hunters: Legend Of The Superstition...

A map of the dead reveals the team's next clue, but it's in the most dangerous stretch of the Superstitions. Eric makes a discovery that spins the investigation in an entirely new direction.

Cities of the Underworld

and Philadelphia: From hidden tunnels beneath Boston to the incredible waterworld under Philadelphia, the Freemasons left behind the blueprints to America's rise.

World War 3 breaks out and a nuclear nightmare becomes reality as thousands of hydrogen bombs destroy the world's greatest cities. In the ensuing nuclear winter, crops fail worldwide and mass starvation drives humanity to the brink of extinction.

In the Pacific Northwest, an investigative team searches for evidence of Sasquatch on Vancouver Island, where Native Americans once told tales of an ape-like beast that would steal children away.