Finding the actual Holy Grail is the holy grail for all global investigators so Rob’s on the case. He’s following in the footsteps of the Knights Templars and unearthing new evidence that could prove the grail has been hidden in Scotland all this time.

Rob must find out what happened to Rome’s 9th Legion, which vanished into thin air. He meets with military historians and archaeologists as he searches through muddy bogs, analyzes ancient skulls and learns about Roman ghosts.

For centuries, experts and archeologists have tried to pinpoint the lost city of Atlantis, but all have failed. Now Rob Riggle is on the case, and Atlantis has nowhere left to hide.

Rob’s recipe to solve a 300-year-old pirate mystery in the Florida Keys? One shovel. One metal detector. One Daquiri.

Most people know about Wyatt Earp and the shootout at the OK Corral but only Rob Riggle knows that this classic story is directly connected to the lost treasure of Skeleton Canyon

Is there life in outer space? Rob Riggle is on the case and heads to the Nevada desert, a UFO hotspot. He meets with an ex-CIA agent, Air Force pilots, a professional UFO hunter and a team of investigators.