Plot summary
Shawn and Gus are invited to a convention for paranormal crime solvers. There they meet a woman ( Yvette Nicole Brown ) who claims to be a witch and a man ( Tom Arnold ) who claims to communicate with a ghost. When the man who spearheaded the convention is murdered, the consultants must set aside their differences to work together to solve the murder. In the meantime, Chief Lassiter asks Shawn and Gus to kick their tomfoolery up to an 11 in an effort to scare off his unwanted new head detective ( Mira Sorvino ) and get Juliet the position. Their efforts to do so backfire, however, and in the end, Lassiter is forced to acknowledge that he has more in common with his head detective than he originally thought.
Credits
Adapted from Wikipedia contributors, Psych season 8. HTML formatting and reference markers removed.