MysteryX HD Sunday

A selection of recently declassified FBI files provides new evidence for the debate over whether alien life really exists, and theorists claim the Vatican may be hiding the truth

The three types of close encounters - sightings, fleeting interactions and aliens taking humans for extended periods, meeting real people who have experienced alien-life up close

Sightings of Unidentified Aerial Phenomena, which have become more frequent of late and are now able to be measured on sophisticated technology

In 2008, nearly 850 people are killed in the Russo-Georgian War. How did it erupt and what is the current relationship between the two nations?

The Battle of Kadesh, fought in the 13th century BC between the Egyptian Empire led by pharaoh Ramesses II and the Hittite Empire led by king Muwatalli II

The team investigates the origins of a hill fort, which was long thought to be Iron Age but is now believed to be an even older defence against invasion

Revisiting the killing of brilliant but controversial young playwright Christopher Marlowe, who was stabbed to death in a Deptford lodging house in 1593

The 1,000 giant giant stone heads of Easter Island are some of the most recognisable statues on Earth, but are also some of the least understood. Where did they come from?

Off the coast of North Carolina, experts are studying a 300-year-old shipwreck that has been positively identified as Blackbeard's flagship

The series examines six more mysterious satellite images, including a possible smokescreen over North Korea, and two forgotten pyramids in Egypt

Photographs illustrate how the barely inhabited Australian Outback seems to light up like a network of vast cities when viewed from space

Space journalist Sarah Cruddas joins Craig to investigate a spectacular mass UFO sighting over the city of Phoenix, Arizona, in 1997

Strange lights reported in 1980 by security officers near the East Gate of RAF Woodbridge - a US Air Force base in Suffolk

Three men in Brazil escape what they believed to be a close encounter with aliens, only to realise their ordeal may not be over. Plus, a boy investigates a strange object in Canada

How recent discoveries are redefining spiritual, cultural and migration histories across continents and millennia

In 2012, the remains of King Richard III were discovered, offering unprecedented insight into the last moments of England's controversial monarch

A trip to Harvard University's Warren Anatomical Museum, where one of the displays is the shattered skull of a 19th-century American railway worker

Investigating monster tales told throughout history and whether the explanation could be extraterrestrial. Beginning with Bigfoot

Investigating real-life crimes in the age of film noir, beginning with triple homicide suspect Robert Irwin, who sold his story to finance his defence

A Bronze Age warrior grave, ancient settlements and startling environmental discoveries reveal how nature continues to uncover the past

The design, service and loss of the Achille Lauro, a ship which suffered two serious collisions, multiple onboard fires and was even hijacked by PLO terrorists in 1985

Reports of odd phenomena, witnessed over the years. A staff sergeant remembers being attacked by a shadowy figure with long dark hair, who promptly disappeared

In Afghanistan, Lance Corporal Jose Herrera encounters death scents, orbs of light, and unease beyond the normal stress of war

The life of Ramses II - also known as Ramses the Great - a pharaoh who expanded Egypt's borders, built monuments and signed the first international peace treaty

The team examines skulls from the site of the 1499 battle that saw Switzerland win its independence from the Holy Roman Empire, and which changed the nature of medieval warfare

The series examines six more mysterious satellite images, including a possible smokescreen over North Korea, and two forgotten pyramids in Egypt