Lost Worlds explores the tunnels beneath some of London's greatest buildings. The underground command centre from where the Battle of Britain was won is just one of the secret bunkers toured in this episode.

Engineering Disasters

Megalithic monuments linked by electromagnetic energy. Prehistoric ruins arranged across distances in straight lines. Were ancient man's spectacular structures built by humans alone or do they bear evidence of design by other worldly visitors?

Engineering Disasters

Why did Asiana flight 214, packed with passengers, suddenly crash land and cartwheel across San Francisco International Airport's runway? Three families of the dead want answers.

The team investigate a strange object seen over Chicago's O'Hare Airport in 2006. Are aliens watching our airports? And if so, could they have a malevolent agenda?

The Romans, with the greatest army in the world, are annihilated by Germanic tribes at the Battle of Teutoburg Forest. Go inside the culture of some of the most famous warriors to explore their weaponry, tactics and, ultimately, their psyche.

The series finale focuses on the reliquary casket. Carl and Hamilton know the casket dates to a later period - probably early 15th century. Yet a series of engravings on it - the 'box code' - appears to make veiled references to Templar beliefs.

MonsterQuest looks into reports of chimpanzees on the loose in the United States.

Lost Worlds explores the tunnels beneath some of London's greatest buildings. The underground command centre from where the Battle of Britain was won is just one of the secret bunkers toured in this episode.

Engineering Disasters

Megalithic monuments linked by electromagnetic energy. Prehistoric ruins arranged across distances in straight lines. Were ancient man's spectacular structures built by humans alone or do they bear evidence of design by other worldly visitors?

Engineering Disasters

Why did Asiana flight 214, packed with passengers, suddenly crash land and cartwheel across San Francisco International Airport's runway? Three families of the dead want answers.

The team investigate a strange object seen over Chicago's O'Hare Airport in 2006. Are aliens watching our airports? And if so, could they have a malevolent agenda?

The Romans, with the greatest army in the world, are annihilated by Germanic tribes at the Battle of Teutoburg Forest. Go inside the culture of some of the most famous warriors to explore their weaponry, tactics and, ultimately, their psyche.

The series finale focuses on the reliquary casket. Carl and Hamilton know the casket dates to a later period - probably early 15th century. Yet a series of engravings on it - the 'box code' - appears to make veiled references to Templar beliefs.

MonsterQuest looks into reports of chimpanzees on the loose in the United States.

Lost Worlds explores the tunnels beneath some of London's greatest buildings. The underground command centre from where the Battle of Britain was won is just one of the secret bunkers toured in this episode.

Megalithic monuments linked by electromagnetic energy. Prehistoric ruins arranged across distances in straight lines. Were ancient man's spectacular structures built by humans alone or do they bear evidence of design by other worldly visitors?

Engineering Disasters

Why did Asiana flight 214, packed with passengers, suddenly crash land and cartwheel across San Francisco International Airport's runway? Three families of the dead want answers.

The team investigate a strange object seen over Chicago's O'Hare Airport in 2006. Are aliens watching our airports? And if so, could they have a malevolent agenda?

The Romans, with the greatest army in the world, are annihilated by Germanic tribes at the Battle of Teutoburg Forest. Go inside the culture of some of the most famous warriors to explore their weaponry, tactics and, ultimately, their psyche.

A priceless relic unearthed on a shipwreck in Madagascar launches dive expert Barry Clifford and historian Scott Wolter on a world-wide investigation to find out if there's a link between the 17th century pirates and the medieval Knights Templar.

MonsterQuest looks into claims that large cats are on the prowl in the forests of the United States.

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

Engineering Disasters

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?