- Season 4 : Episode Guide
- Season 4 : Episode 1 & 2 : The Yanks in the U.K.
- Season 4 : Episode 3 : The man in the outhouse
- Season 4 : Episode 4 : The Finger in the Nest
- Season 4 : Episode 5 : The Perfect Pieces in the Purple Pond
- Season 4 : Episode 6 : The Crank in the Shaft
- Season 4 : Episode 7 : The He in the She
- Season 4 : Episode 8 : The Skull in the Sculpture
- Season 4 : Episode 9 : The Con Man in the Meth Lab
- Season 4 : Episode 10 : The Passenger in the Oven
- Season 4 : Episode 11 : The Bone That Blew
- Season 4 : Episode 12 : Double Trouble in the Panhandle
- Season 4 : Episode 13 : Fire in the Ice
- Season 4 : Episode 14 : The Hero in the Hold