S4·E16 The Play's the Thing

While at the theater, Gary runs into his old friend, ex-Chicago police detective Marion Crumb, who joined the Shakespearean troupe after the play's director, Bonnie Rousseau, convinced him to pursue his natural born acting talents. While pooling the cast's money to put on the production, Bonnie recruits Gary to replace one of the leads who has had an accident. As Gary throws himself into his new role, the production is threatened -- first by a producer claiming to have rights to the theater and then by an arsonist. As Gary and Marion work together to put out all the fires, damaging evidence arises against Bonnie that reveals she's a scam artist. With hours left before show time, it's up to Gary to stop Bonnie from deserting her devoted troupe -- or else it's curtains for everyone.