Many of us fantasise about trying on a new identity, but when does the line between impersonation and transformation become blurred? Is it possible that by pretending to be someone else, a person can actually change their identity?

The Mayan civilisation dominated Central America for nearly 2000 years, but by the 9th century AD, the great Mayan cities were abandoned and the Mayan people vanished. What could have happened to this advanced culture?

Featuring first-person accounts by military eyewitnesses, government insiders and UFO experts, this special traces what a government investigation into 144 recent sightings can tell us about what these mysterious objects are and where they come from.

Witnesses describe a series of events surrounding the now legendary crash, while an incredible new technology attempts to read words on a 70 year old photograph that may hold clues to the mystery: Did an extraterrestrial spaceship crash at Roswell?

Discover how cornered Egyptian soldiers miraculously escaped the Hittites in one of the greatest armed battles of the ancient world.

Ross completes his specialist SCUBA training under the expert tutelage of dive Supervisor Neil Brock, and inspired by the stories of his shipwrecked relatives, he heads up to the Royal Navy’s historic naval base in the far northerly Orkney Islands.

Hunting for the Lost Dutchman is usually a one-man journey, but Wayne Tuttle is partnering with a team of experts to follow a newly-revealed clue that could finally solve the 500-year-old mystery of America's most famous buried treasure.

Many of us fantasise about trying on a new identity, but when does the line between impersonation and transformation become blurred? Is it possible that by pretending to be someone else, a person can actually change their identity?

The Mayan civilisation dominated Central America for nearly 2000 years, but by the 9th century AD, the great Mayan cities were abandoned and the Mayan people vanished. What could have happened to this advanced culture?

Featuring first-person accounts by military eyewitnesses, government insiders and UFO experts, this special traces what a government investigation into 144 recent sightings can tell us about what these mysterious objects are and where they come from.

Witnesses describe a series of events surrounding the now legendary crash, while an incredible new technology attempts to read words on a 70 year old photograph that may hold clues to the mystery: Did an extraterrestrial spaceship crash at Roswell?

Discover how cornered Egyptian soldiers miraculously escaped the Hittites in one of the greatest armed battles of the ancient world.

Ross completes his specialist SCUBA training under the expert tutelage of dive Supervisor Neil Brock, and inspired by the stories of his shipwrecked relatives, he heads up to the Royal Navy’s historic naval base in the far northerly Orkney Islands.

Hunting for the Lost Dutchman is usually a one-man journey, but Wayne Tuttle is partnering with a team of experts to follow a newly-revealed clue that could finally solve the 500-year-old mystery of America's most famous buried treasure.

Many of us fantasise about trying on a new identity, but when does the line between impersonation and transformation become blurred? Is it possible that by pretending to be someone else, a person can actually change their identity?

The Mayan civilisation dominated Central America for nearly 2000 years, but by the 9th century AD, the great Mayan cities were abandoned and the Mayan people vanished. What could have happened to this advanced culture?

Featuring first-person accounts by military eyewitnesses, government insiders and UFO experts, this special traces what a government investigation into 144 recent sightings can tell us about what these mysterious objects are and where they come from.

Witnesses describe a series of events surrounding the now legendary crash, while an incredible new technology attempts to read words on a 70 year old photograph that may hold clues to the mystery: Did an extraterrestrial spaceship crash at Roswell?

Discover how, after years of rivalry, a small Greek army defeated the Persians through sheer mettle and a brilliant defensive strategy.

Ross first takes on the largest wrecks in Scapa Flow: Germany’s sunken WWI fleet. Ross tries to understand why the proud German fleet ended up at the bottom. The trail leads to an experimental British aircraft carrier submarine.

Hunting for the Lost Dutchman is usually a one-man journey, but Wayne Tuttle is partnering with a team of experts to follow a newly-revealed clue that could finally solve the 500-year-old mystery of America's most famous buried treasure.

Many believe it to be the Word of God, while others claim it contains inconsistencies that could only be manmade. But whether actually divine, or merely divinely inspired, the Bible is inarguably the most important historical text ever written.

The Maya created the most sophisticated calendar systems in the ancient world, and according to many scholars their Long Count calendar will come to an end on December 21, 2012. What significance does this hold?

From greed and gore to Grand Masters, we recreate this covert world of secrets and power.

The ancient Greeks laid a foundation that supported nearly 3,000 years of European history. How did they build structures including Agamemnon's Tomb and the Parthenon?

In Mexico explorers use an ancient Mayan temple code to search for an occult underworld. In Britain investigators uncover the secret technologies behind a life size statue of Jesus Christ.

Discover how, after years of rivalry, a small Greek army defeated the Persians through sheer mettle and a brilliant defensive strategy.

Ross first takes on the largest wrecks in Scapa Flow: Germany’s sunken WWI fleet. Ross tries to understand why the proud German fleet ended up at the bottom. The trail leads to an experimental British aircraft carrier submarine.

Hunting for the Lost Dutchman is usually a one-man journey, but Wayne Tuttle is partnering with a team of experts to follow a newly-revealed clue that could finally solve the 500-year-old mystery of America's most famous buried treasure.