Ultimate Mysteries, Unidentified

New theories shed light on the world's biggest mysteries, including the unsolved disappearances of aviator Amelia Earhart and hijacker DB Cooper.

What's going on in Area 51? What crashed at Roswell? And what's happening at the top-secret Dugway Proving Ground? Experts go in search of answers.

Experts investigate the US government's experiments into teleportation. They also dig into strange happenings at Mount Shasta and Skinwalker ranch.

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

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.

Were Betty and Barney Hill really abducted by aliens? Experts investigate. They also explore the mystery of The Mothman, and Travis Walton's disappearance.

A new and shocking theory could explain one of America's most famous unsolved crimes - the disappearance of aviator Charles Lindbergh's 20-month-old son.

In 1955, a family of seven in Kentucky fired their guns on an alleged alien attack. But what did they really see?

The hunt is on for the Civil War Gold and for $1.5million taken in 1962's Plymouth Mail robbery. Plus, treasure seekers search for the Lost Dutchman mine.

Could an ex-cop have solved the mystery of Jimmy Hoffa's disappearance? Plus, experts investigate whether J F Kennedy's brain might have gone missing.