Psych: Season 4, Episode 4

4 - 4: The Devil's in the Details... and in the Upstairs Bedroom

A college girl commits suicide at a Catholic University. While Shawn believes it to be mere suicide, Father Westley (Ray Wise) - one of the professors at the school - and Gus are convinced the girl was demon-possessed. Although he is skeptical towards that idea, Shawn decides to play along, until the case takes a turn.