Psych S02 E10 Gus' Dad May Have Killed an Old Guy

"Fake psychic. Real detectives."

Christmas with the Gusters is ruined when Gus' parents' neighbor is killed, a clue leads Lassiter to look at Mr. Guster more closely. Evidence leads the police into arresting Gus' mother too, and Shawn and Gus vow to get them out of jail.