Vikings

This three-part documentary series explores the links between the Third Reich and its leaders' belief in occult powers and practices. Various episodes focus on the history and meaning of the swastika, the hidden spiritual forces behind the SS, and Hitler's own study of Germanic mysticism.

A look at the catastrophic threat natural phenomena can pose to the U.S. and the world.

An eight-part chronicle of the American presidency, examining the legacy and defining moments of each president.

Ex-astronaut Scott Carpenter hosted this half-hour series, which explored seas around the world.

Christopher "Biggie Smalls" Wallace is profiled.

People recall instances of extreme manipulation.