Psych season 2 episode 15
Episode title: Black and Tan: A Crime of Fashion
It's Gus' birthday, so Shawn takes him to the launch party for Ciao clothing's new fall line. While Gus tries to make a move on his favorite model, one of the owners of Ciao is suddenly electrocuted via the stage's microphone. Shawn is certain that his death was no accident, so Shawn and Gus move in to the loft where the Ciao models live.
