
Exploring the mysteries that have never been solved and providing a deeper look into the stories and theories that surround them.

New theories about the Mantell UFO incident are revealed; scientific evidence may explain a UFO encounter in Texas; experts investigate what really crashed into a Canadian harbor.

Experts investigate the mystery of the Bermuda Triangle; researchers seek answers about strange sightings in Massachusetts; a murderer may be responsible for a string of unexplained disappearances in Bennington, Vt.

Experts may have finally identified the strange creatures that besieged a Kentucky farmhouse; new evidence could explain the largest mass UFO sighting in U.S. history; investigators seek answers in Chicago's O'Hare International Airport sighting.

A new theory is posed about what really happened to Charles Lindbergh's kidnapped son; experts may have finally solved one of Hollywood's biggest murder mysteries; a small Ohio town seeks answers to thousands of threatening letters.