Bobby's back on the job, but things are a little uneasy between him and Andy until they work a bar shooting where a terminally ill prison guard holds the key to solving the case. Diane uses a suspect's sexism against him on a string of rape-assault cases. James and Gina get married.

As Andy ponders the lyrics to "Pop Goes the Weasel", he and Bobby must help a murder witness who has a perfect head for details but is otherwise out of her mind. After she gets kidnapped, Andy's hypocrisy gets a workout when he castigates ADA Leo Cohen for making a deal to get her back safely, leading Jill to give Leo some kind words. Greg and James find out an Indian man's brother is behind a series of cab robberies.