World's Greatest Mysteries

The tragic 1997 death of beloved royal and humanitarian Princess Diana is profiled in this episode.

This episode probes a controversial conspiracy theory tied to the 1941 attack on Pearl Harbor.

Theories surrounding the death of outlaw Butch Cassidy feature in this episode.

Theories surrounding some of the world's greatest contemporary innovations feature in this episode.

What are the mysterious secrets of Florida's ancient Coral Castle?

Theories surrounding the assassination of Abraham Lincoln.

What drives the intelligence of the world's child prodigies?

In March, 1997, a group of citizens claimed to see bizarre lights coming from the sky. Were these visions linked with UFOs?

The beginnings of humanity are probed in this episode.

Conspiracies behind the fate of missing American soldiers are explored.

This episode profiles perhaps the most notorious conspiracy of all: the tragic murder of President John F. Kennedy.

What secrets lie within the iconic pyramids of Egypt?

The most infamous of all rumored UFO sightings is explored.

What secrets hide behind the walls of Area 51?