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Three places, three spooky stories. Experts examine weird sightings and unsolved disappearances at Bennington, Bermuda and Bridgewater triangles.

Troy rushes to Florida to find a Nile crocodile, one of the world's deadliest animals - and recruits expert gator wranglers to capture the beast.

Investigate alien-like metal monsters coming from the sea, a war between 30 million crabs and an army of killer ants, and the white wall of death from which there is no escape.

Soviet troops withdraw from Afghanistan in 1989 after fighting a force funded by the US. Should the US be blamed for the rise of Islamic terrorism.

The story of one of the world's most effective war machines: The Viking longship. They were elegant, versatile and feared.

Explore how the Axis Powers' ruthless, brutal occupation and exploitation of other countries contributed to their demise.

Exploring the impact of the Battle of Hastings in 1066, Karl and Kevin continue their look at how weapons and body armour developed.

For decades, claims of extraterrestrial presence on Earth have been made - and the government have gone to great lengths to discredit them.

For thousands of years, humankind has attempted to make contact with extraterrestrial beings from beyond Earth.

60 years on, Tony's close encounter has become an obsession. Meanwhile, pilot David presents photographic evidence of the UFO he almost crashed into whilst flying near area 51.

Stirling has long been one of the most strategically important castles in Britain. Dan Jones examines the rich and savage history of this stronghold.

Can Hugh and the team find the remains of a vanished building in the gardens of the Georgian stately home Beningbrough Hall.

Investigate the secrets behind the Hadzabe Myth in Tanzania, visit Colorado's incredible Cheyenne Mountain Complex and check out a fascinating abandoned boat in Croatia.

A look at the world's largest art museum, located in Paris, France and the home of the Mona Lisa.

What did UFO chaser Captain Mantell see before he was killed? Plus, experts investigate a close encounter in Texas and a mysterious crash at Shag Harbour.

Deep in the Everglades, Troy recruits an army of swampers to investigate reports of a possible beast - the Skunk Ape - probing his friend's home.

Explore the mystery of the stone giant and the vanishing desert kingdom, and nukes and spooks in the Middle East. Plus, Harry Potter's Hedwig reveals her dark side.

A Greenpeace ship is bombed in 1985, killing Fernando Pereira. The French authorities deny responsibility and questions over nuclear restrictions arise again.

Explore how ships evaded detection post-WW2 with radar, adopting shocking methods to remain hidden.

Pioneer of the Multiverse: Dr Jacques Vallée is best known for his work in the field of UFOs - and his bold theories challenge the notions of alien life.

Throughout ancient cultures there are tales of god-like beings helping our ancestors to build civilisations and teaching them in various disciplines.

Adam, Gwen and Julie recall personal encounters with UFOs, before experts' theories are put in doubt when we learn that each individual has time missing from their encounters.

Dan visits one of Northern Ireland's oldest castles, Carrickfergus, to learn more about the tempestuous relationship between Britain and Ireland.

Hugh and the team search for the remains of a Norman motte and bailey castle in the suburb of West Derby and uncover gems in the residents' gardens.

What did UFO chaser Captain Mantell see before he was killed? Plus, experts investigate a close encounter in Texas and a mysterious crash at Shag Harbour.

Deep in the Everglades, Troy recruits an army of swampers to investigate reports of a possible beast - the Skunk Ape - probing his friend's home.

Explore the mystery of the stone giant and the vanishing desert kingdom, and nukes and spooks in the Middle East. Plus, Harry Potter's Hedwig reveals her dark side.

A Greenpeace ship is bombed in 1985, killing Fernando Pereira. The French authorities deny responsibility and questions over nuclear restrictions arise again.

Explore how ships evaded detection post-WW2 with radar, adopting shocking methods to remain hidden.

Was Leonardo Da Vinci, one of history's great thinkers also one of its greatest prophets? And did he envision world destruction.

Declassified records reveal elite forces' extreme missions, from deep-sea divers on Soviet cables to A-bomb deployments in hostile zones.

Pioneer of the Multiverse: Dr Jacques Vallée is best known for his work in the field of UFOs - and his bold theories challenge the notions of alien life.

Throughout ancient cultures there are tales of god-like beings helping our ancestors to build civilisations and teaching them in various disciplines.

Adam, Gwen and Julie recall personal encounters with UFOs, before experts' theories are put in doubt when we learn that each individual has time missing from their encounters.

Dan visits one of Northern Ireland's oldest castles, Carrickfergus, to learn more about the tempestuous relationship between Britain and Ireland.

Hugh and the team search for the remains of a Norman motte and bailey castle in the suburb of West Derby and uncover gems in the residents' gardens.

Travel to Abu Dhabi's incredible Masdar City, check out the Wieliczka Salt Mine in Poland and visit an Indian village where the houses don't have doors.

A walk through the iconic mausoleum complex, located in India and commissioned in 1632 by the Mughal emperor Shah Jahan to house the remains of his beloved wife.

Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years.

A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help.

Ships don't have to be large to make history, like the 1776 gunboat built to stop a British invasion, or the remarkable story of the HA-19 sub.

A look at the tactics employed to pass strategically important ships under the nose of the enemy, and the use of intelligence to carry out naval attacks.

Hugh and the experts attempt to uncover a lost Roman fort connected to the Antonine Wall, buried beneath the gardens of the quiet streets of Falkirk.

Hugh Dennis and a team of archaeologists are in Devizes, searching for a revolutionary 19th-century prison with a unique design.

Dan delves into the rich past of the Tower of London, exploring inside the imposing walls that have witnessed some of the most important events in our history.

Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years.

A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help.

Science shines a light on the dark side of Ancient Egypt, from a 5,000-year-old homicide to drug-fuelled debauchery - and one very shocking revelation.

Discover how, for the past few thousand years, this mighty ruler has remained a caricature of his own propaganda.

The Battle of Qadesh: A battle worthy of Hollywood that founded the glory of Ramses II when he faces the king Muwatalli II at Qadesh.

Cleopatra II's reign was a truly dramatic and grisly tale. She saw her dynasty torn apart by hatred - but also saved it from destruction.

Delve into the theories that could help explain why and how the ancient Egyptians came to build the pyramids.

When a century-old extradition treaty between Britain and Spain ended in 1978, the Spanish Coast became a safe haven for the mafia and criminal masterminds.

Rewind to the US Army's largest and bloodiest conflict of World War II: The Battle of the Bulge. Venture through the battle in newly colourised footage.

Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years.