The Tibetan Book of the Dead: This ancient document was kept secret in the most remote region of the world. Interviews with scholars and Buddhists bring this mysterious text to life.

Experts unseal the truth about the potential aliens living and working among us. Who has come in peace? And who has a more sinister motive in mind? (S1, ep 11)

The Pharaohs' Curse: Could a curse really exist on Tutankhamun's tomb, but in the form of alien technology designed to protect an incredible secret about our past? (S10, ep 4)

The Monoliths: Giorgio Tsoukalos takes a closer look at the evidence as he asks whether Earth's stone monoliths were built with extra terrestrial help. (S1, ep 2)

The Tudor Way: Tony Robinson takes a 45-mile hike through the beautiful countryside of the Weald in Kent and East Sussex, discovering its rich and surprising Tudor heritage. (S1, ep 3)

Moving Mountains: Series exploring how many of today's greatest technological achievements were actually developed hundreds of years ago. (S1, ep 1)

All's Well: As the fellowship prepares to get a team member underground in the money pit, a new theory suggests that Nolan's Cross holds the secret to its exact location. (S10, ep 13)

D-Day In The Pacific: While the Allies storm France, American forces hit the Marianas Islands and the Enterprise supports one of the most deadly battles of the Pacific War. (S1, ep 8)

Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena. (S4, ep 5)

The Koran has shaped the Muslim faith for over 1,400 years. Explore the mystery, majesty and controversy that surrounds this most famous of texts. (Part 2 of 2)

Astronaut Encounters: To this day, NASA denies all UFO accounts and has taken measures to prevent its astronauts from telling their stories. But what are they hiding? (S3, ep 3)

The SS Death Head's Unit: Tasked with guarding concentration camps, this unit's actions knew no bounds, and, despite their heinous acts, still attended social gatherings. (S1, ep 5)