If You're So Smart, Then Why Are You Dead? Psych : Season 2 Episode 7

Shawn and Gus take on academia as lecturers at a school for the gifted where two students suspect a teacher of murder, they just don't know who's been murdered or the murderer's identity. At the precinct, Juliet lobbies hard for lead position on the next case, and Lassiter hands her a "gimme". The same case Gus and Shawn are working.