Kelly begins moonlighting as a security guard for Susan Wagner, a wealthy woman who's married to an abusive husband. But things take a turn when the husband is shot and killed, and Mrs. Wagner becomes a suspect. Meanwhile, Sipowicz is paired with the hard-nosed Detective Walker who arrests a man for a robbery and double-murder. While Detective Walker thinks he's guilty, Sipowicz thinks differently. Laura quits her job and plans to move into a position with the District Attorney's office, prosecuting narcotics. The increasingly edgy Josh Goldstein has Kelly appear at a tenant's readiness group regarding crime, and he is later killed trying to save an elderly woman from a mugging on a subway platform.