S1, EP6 "Really Close Encounters"
Examining the probability of 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.
S1, EP5 "The Mysterious Disappearance of The Lost Legion"
In order to find out what happened to Rome's 9th Legion, which vanished into thin air, Rob meets with military historians and archaeologists, searches through muddy bogs, analyzes ancient skulls, and learns about Roman ghosts.
S1, EP4 "The Mystery of the O.K. Corral"
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.
S1, EP3 "Pirate Booty"
Rob's recipe to solve a 300-year-old pirate mystery in the Florida Keys is: one shovel, one metal detector, one Daquiri.
S1, EP2 "The Holiest of Grails"
Finding the actual Holy Grail is the holy grail for all global investigators so Rob's on the case; 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.