Psych Season 4 Episode 7
Overview
Shawn and Gus investigate the death of Leonald Callahan, aka Diddle, a computer cryptologist who was the baritone in Gus’s old college a capella group.
Director: Stephen Surjik
Guest Star: Andrew Wheeler, Charles Zuckermann, Chris Shields, Demord Dann, Ecstasia Sanders, Jaleel White, Kenan Thompson, Kenji Maeda, Kurt Fuller, Liam James, Sage Brocklebank, Tony Todd