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.
Three places, three spooky stories. Experts examine weird sightings and unsolved disappearances at Bennington, Bermuda and Bridgewater triangles.
An investigation into the Mantell UFO, with new scientific evidence behind the UFO encounter in Levelland, Texas.
Experts investigate if Betty and Barney Hill were really abducted by aliens, explore the mystery of the Mothman, and Travis Walton's five-day disappearance.
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.