Danny and Andy catch an assault that looks like it was done by the boys in blue. Jill considers dating her ex-husband.

Jill's son has his first communion, where Andy and Danny spot a surveillance van across the street from the church. A baby is found dead in a dumpster.

Andy is finding Theo a challenge. A man is found dead in a hotel bath-tub, minus a part of his anatomy and some personal effects. A mother brings her son into the house because she thinks he's been stealing.

The squad attends a homicide with seven naked bodies. Jill's ex is arrested.

James passes his sergeant's exam. Jill's ex-husband could be causing problems for Jill.

It's James' last day with the squad before he moves on as a sergeant. Jill's ex is in the wind and causing more problems for Jill.

Medavoy gets a new partner. A cop is shot and killed. Diane seeks counsel from Andy about whether to tell Jill what she knows about her ex.

A woman is run over by a bus, she was already dead when she was tossed from a van. Two Russian boys go missing after their father says he left them with his sister.

A young boy is suspected of killing his mother's boyfriend; Fancy realizes that Lt. Abner is severely depressed. Sipowicz has a date with a niece of a friend as a favor; Katie becomes upset at this news.

Andy and Danny reopen an unsolved murder when the body of a small child is found buried within a wall; Medavoy and Jones deal with the owner of a dog who has a bullet in his nose they need as evidence in their case.

Fancy tries to rebuild his relationship with Abner; Andy and Danny investigate the murder of a club owner; Jones takes out his frustration on a man who is suspected of raping and beating a woman.

John Irvin, the department's PAA, helps Andy and Danny with a possible love triangle homicide. Jill and Diane help a mentally challenged woman find the gang who raped her.

Medavoy and Jones look for a woman reported missing by her "distraught" husband; Andy and Danny deal with a snotty, eccentric art owner whose collection has been stolen.

Andy and Danny investigate the robbery of an elderly couple; Medavoy and Jones deal with a wealthy woman with a grudge against her former maid; Danny's informant, J.B., seems headed for disaster.

Danny has an emotional crisis; John Irvin helps in a case involving stolen antique clothing; Jill deals with a young woman with small children who steals because of her unemployed, abusive husband.

Jones uses his charm to help Andy and Danny solve the murder of an elderly couple; Medavoy gets involved with an old friend who is having trouble with the Chinese mafia.

A dismembered is found in a barrel. The trail leads Andy and Danny to a mobster who denies knowledge; they later learn he's connected to another murder, his wife who disappeared years earlier.

A young woman tries to convince Jill and Diane that her twin sister has become a victim of foul play. Andy and Danny investigate an immigrant's missing, wealthy and unpopular wife.

The detectives accept the help of a pair of British policeman catch a rapist-murdered who has emigrated from England to NY. Meanwhile, Jones becomes close with a reporter he met during a previous case.

Diane once again finds herself embroiled with Harry Denby who has information about Jill's ex-husband. Greg and Jones discover a home repair scam.

Andy goes into a tailspin when a doctor's visit reveals that Theo may have cancer. Diane and Jill's relationship suffers when info about Jill's ex-husband surfaces. Andy and Danny ponder the impact on Jill's career.

IAB is closing in on Jill. Jill explains the leverage Don has over her. Andy stays by Theo's side as he undergoes tests to determine if he has cancer. Changes are made in the department as fallout over Jill's ex-husband.

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.

Jones and Medavoy investigate the murder of a Chinese restaurant owner. An IRS agent claims to have been kidnapped and released, but Sipowicz and Sorenson doubt his story.

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.