The detectives investigate a multiple homicide at a fast food restaurant; an addict gives his baby daughter to a drug dealer as collateral on an overdue loan; Internal Affairs reopens the Kirkendall case.

Danny wakes up in Diane's bed. Andy and Katie get Theo's test results. A former colleague of Bobby's reaches out to Diane from prison. The team investigate a series of cab-driver shootings.

An female officer is shot following a stationery store robbery and later dies in hospital. Danny tries to keep Diane safe. A new ADA arrives. Katie decides to move back home.

Fancy is being sent on a training course ahead of the squad getting computers. A woman is attacked by a court jester in a hotel room, then a body is found in another room - are they connected? Diane questions her involvement with Danny.

Diane turns to a friend at the Survivor's Network for help. A body is pulled from the water. Two Chinese men are brought in handcuffed together. The new computers arrive.

A schoolgirl is found dead. Andy asks Eddie's niece on a date. John babysits Theo for the first time.

A homeless guy Danny was trying to protect turns up dead. The DOA's father is concerned about the trust fund his sister will now inherit.

Fancy bawls out Diane and Danny about being in a relationship. A man traveling on the subway is killed. Denby is implicated in the courier scam.

Danny could be in big trouble for roughing up a suspect. Detective Connie McDowell joins the team for the day.

Danny is restored to full duty. Off. Szymanski's cousin is knocked down in the street and killed. Capt. Bass's wife is injured during a robbery at her store. Greg plays matchmaker.

Andy witnesses a hold-up in the street and shoots at the get-away car. Det. Ross is assigned to fill in at the squad again.

A man looses his penis. Fancy makes Captain and the incoming Lieutenant is a ball-breaker. Andy is having second thoughts about Cynthia. A mob hit-man sings like a canary and implicates a celebrated Customs officer.

A man caught carrying a cash register takes Andy and Danny to a body. Fancy is packing up to leave. His replacement alienates the squad before he's even left.

Rodriguez mediates when Sipowicz and Sorenson clash with detectives from another squad anxious to solve a multiple murder case; Medavoy and Jones try their hand at making extra cash by cleaning up murder scenes.

Sipowicz and Sorenson investigate a case involving an off-duty police officer who was shot in the company of a prostitute; Medavoy and Jones aid a hapless bodega owner by concocting a story to keep him out of jail.

Sipowicz and Sorenson try to get one scared witness to identify a murder suspect, while Russell and McDowell guard another witness who's due to testify in a murder trial.

Sipowicz and Sorenson investigate the murder of an exotic dancer; Sipowicz and Medavoy act as elderly decoys to catch some street thieves attacking old people outside a local bank.

Sipowicz and Sorenson investigate the murder of a drug dealer, while Sorenson continues to see the stripper, Kristen, who draws him into a favor for the owners of the Tailfeathers club.

Sorenson is missing, and a stripper is found murdered in his apartment. Medavoy and Jones investigate a killing, but the suspect identified by an eyewitness has a seemingly unshakable alibi.