A top-secret Nazi project - "Die Glocke," was believed to be a time travel device that could soar through the sky and eventually reach the speed of light and beyond. Did Die Glocke actually exist, and could it have been based on alien technology?

When Emperor Decius took control of the empire, he sought to restore the pagan gods. His reign saw persecution of Christians, before plague struck and the Goths invaded.

In 2014, the FBI discovered the possibility that Hitler may have escaped to South America. With declassified intelligence providing new clues, Hunting Hitler attempts to solve the mystery surrounding the demise of the biggest criminal of all time.

2000 years ago, when Washington was still a swamp, the Maya were busy transforming some of the most inhospitable jungle imaginable into the New World’s first powerful metropolis.

Madness frontman Suggs and militaria expert Stephen Taylor visit Little Staughton in Cambridgeshire, the location of a former Pathfinders Force airbase.

The team uncovers rare footage of floating giant triangles hovering over cities. Could these strange sightings be extraterrestrial in origin?

The unique geological conditions that make Krakatoa and it's successor, Anak Krakatau, extraordinarily explosive and, despite its remoteness, dangerous are explained.

Ross Kemp: Shipwreck Treasure Hunter

Ross tries to find out more about his sea-faring Great Grandfather, Arthur �Pop� Chalmers. He discovers that Pop served in the Merchant Navy and survived three shipwrecks. Inspired to know more, he links up with maritime archaeologist Mallory Haas.

A top-secret Nazi project - "Die Glocke," was believed to be a time travel device that could soar through the sky and eventually reach the speed of light and beyond. Did Die Glocke actually exist, and could it have been based on alien technology?

When Emperor Decius took control of the empire, he sought to restore the pagan gods. His reign saw persecution of Christians, before plague struck and the Goths invaded.

In 2014, the FBI discovered the possibility that Hitler may have escaped to South America. With declassified intelligence providing new clues, Hunting Hitler attempts to solve the mystery surrounding the demise of the biggest criminal of all time.

2000 years ago, when Washington was still a swamp, the Maya were busy transforming some of the most inhospitable jungle imaginable into the New World’s first powerful metropolis.

Madness frontman Suggs and militaria expert Stephen Taylor visit Little Staughton in Cambridgeshire, the location of a former Pathfinders Force airbase.

The team uncovers rare footage of floating giant triangles hovering over cities. Could these strange sightings be extraterrestrial in origin?

The unique geological conditions that make Krakatoa and it's successor, Anak Krakatau, extraordinarily explosive and, despite its remoteness, dangerous are explained.

Ross Kemp: Shipwreck Treasure Hunter

Ross tries to find out more about his sea-faring Great Grandfather, Arthur �Pop� Chalmers. He discovers that Pop served in the Merchant Navy and survived three shipwrecks. Inspired to know more, he links up with maritime archaeologist Mallory Haas.

A top-secret Nazi project - "Die Glocke," was believed to be a time travel device that could soar through the sky and eventually reach the speed of light and beyond. Did Die Glocke actually exist, and could it have been based on alien technology?

When Emperor Decius took control of the empire, he sought to restore the pagan gods. His reign saw persecution of Christians, before plague struck and the Goths invaded.

In 2014, the FBI discovered the possibility that Hitler may have escaped to South America. With declassified intelligence providing new clues, Hunting Hitler attempts to solve the mystery surrounding the demise of the biggest criminal of all time.

2000 years ago, when Washington was still a swamp, the Maya were busy transforming some of the most inhospitable jungle imaginable into the New World’s first powerful metropolis.

Madness frontman Suggs and militaria expert Stephen Taylor visit Little Staughton in Cambridgeshire, the location of a former Pathfinders Force airbase.

In this episode we reconstruct the grand hypostyle hall at Karnak; explore the technical innovation and engineering skill that produced the temple at Abu Simbel and rebuild the Ramesseum as he would have seen it.

The team investigates increasing reports of Bigfoot encounters from across the United States.

Brad Meltzer enlists America's help to find lost historical artifacts, which are going missing from museums and public collections at an alarming rate. Including historic moon tapes that hold the clearest footage from the Apollo 11 moon landing.

An exploration of the shapes and patterns seen when observing planets and galaxies, and how the form of the universe itself was created.

Are crystal skulls an elaborate hoax? Or do they possess a great, perhaps even otherworldly power? This episode examines arguably the most controversial of ancient artefacts.

UFO Files

Join us for a detailed examination of the little-known phenomenon of USOs, or "Unidentified Submerged Objects", an advanced type of UFO that can operate just as efficiently in water as in the atmosphere.

A former U.S. Navy radar operator emerges from the shadows to reveal the terrifying day it rained UFOs. U.S. Navy personnel unveil new details including an explanation of why UFOs are sighted over oceans

In this episode we reconstruct the grand hypostyle hall at Karnak; explore the technical innovation and engineering skill that produced the temple at Abu Simbel and rebuild the Ramesseum as he would have seen it.

The team investigates increasing reports of Bigfoot encounters from across the United States.

Brad Meltzer enlists America's help to find lost historical artifacts, which are going missing from museums and public collections at an alarming rate. Including historic moon tapes that hold the clearest footage from the Apollo 11 moon landing.