Unidentified: Inside America's UFO Investigation

Decoding the Past is a History Channel paranormal television series that "decodes" the past by looking for unusual, and mysterious things written about throughout history that may give clues as to what will happen in the future.

An inside look at Skinwalker Ranch, a hot spot of paranormal and UFO-related activity in Utah's Uinta Basin. Anchored by never-before-seen footage of the ranch and what it contains, the series features a team of scientists and experts who conduct a daring and thorough search of this infamous and secretive 512-acre property. With everything from mysterious animal deaths to hidden underground workings and possible gateways that open to other dimensions, witness the close encounters that go beyond conventional explanation, as the team risks everything to finally reveal the ultimate secret of Skinwalker Ranch.

A series profiling serial killers.

The stories behind innovations such as TV, radio, phones, airplanes, motorcycles and power tools as well as the inventors including Nikola Tesla, William Harley, Alexander Graham Bell, Duncan Black and Alonzo Decker.

Acclaimed storyteller and local historian Bil Lepp travels off the beaten path across the country to discover the truth behind mysteries and legends of American history.

The history of the Vikings is examined.