Martinez goes to visit his drug-addicted brother, but finds the superintendent of his building, Hanlan, is a retired cop who is on the take and is forcing the tenants out, and Kelly sets out to prove that Hanlan is responsible for the death of two of the apartment's residents. Meanwhile, Laura's new job as an Assistant District Attorney takes a turn when she's assigned to a case that involves Giardella. Also, the squad deals with Detective Stillwell, a prankster whose jokes in the station house get out of hand.

A minor skirmish on a basketball court leaves one of Kelly's friends dead and the other one in jail for manslaughter. Meanwhile, Sipowicz is convinced that a man knows more about his wife's death in a highway shooting than he is letting on. Laura feels as though she's being dangled in front of Giardella when Sylvia tells her to push on him harder. Janice saves Kelly's life during a drug raid and the event seems to bring them back together.

A shady homeless man, named Lou, comes to the station thinking he's a werewolf and demands to be locked up into a cell before he kills someone when the night comes. However, things take a turn when Kelly investigates Lou when he may be a witness in the murder of a nine-year-old immigrant boy. Meanwhile, Sipowicz is visited by his long-estranged son, Andy Sipowicz, Jr. with his fiancée, Patty Constance, an older woman who Sipowicz discovers that she has been cheating on Andy Jr. Elsewhere, Giardella is killed in his hotel room by a Mafia button man dressed as a window washer before he can testify to a grand jury against his superiors and Laura finds herself the only witness to the murder.

Kelly, Martinez, and the officers arrest Luis Hernandez, a baker, for a murder charge. But Detective Mike Roberts, as well as Detective Kelly, try to get him to confess to the robbery of four taxicabs so they can link him to the murder. Meanwhile, Sipowicz arrests a topless dancer for prostitution and she offers to help him get the owner of the bar who's laundering money for the mob. Laura questions Sylvia's ethics, who tries to protect her personal reputation and Sipowicz's verbal attacks on her. Also, Lt. Fancy and the rest of the squad welcomes the new administrative aide, a beautiful blond woman named Donna Abandando, whom the neurotic Detective Greg Medavoy finds irresistible.