
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 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.

A long-lost cache of Civil War gold may have been found; new evidence could point to the location of the stolen millions from the Plymouth Mail robbery; treasure hunters search for the legendary Lost Dutchman Mine.