A police officer is gunned down outside of the station by a violent criminal, who then goes on a rampage, resulting in several killed or wounded. But when the man dies after being brought in by police, the cause of death must be determined -- was he beaten to death by police, or from wounds sustained during his shooting rampage?
The aftershock of Hopkins' death continues to resonate through the station as Internal Affairs investigates the death of the murderer.
After a Jewish man and his granddaughter are mugged, a militant Jew organizes a group to find and punish the criminal, thinking that the police will do nothing to find the perpetrator. Meanwhile, Jack is interrogated about Hopkins' death.
When the O'Donnells' father is murdered, the first suspects are the Westbrook boys. Meanwhile, Jack testifies to the grand jury about Hopkins' death.
A woman reports that the clowns that live next door to her are harassing her. Meanwhile, Jack and Nona help a man who was beaten and robbed inside his own apartment.
Santoro's brother-in-law is arrested for theft, which may result in trouble for Santoro. Phil, Doyle and Hector are thrown into a chase after hearing shots fired.
Police arrest two gay men following a brawl, but are soon accused of police brutality by one of the men. Terry takes a second job as a driver for a wealthy man, but finds that the man is a wanted criminal.
Terry goes undercover to expose his wealthy boss. Patrick struggles to cope with his disability. Meanwhile, a woman leads police to a house with six dead people inside.
McKenzie's ex-wife is found dead inside her apartment. Meanwhile, Terry continues to investigate his boss undercover.
Jimmy begins to worry about Terry, who is still working undercover. Patrick returns to work, but struggles to accept that he will be in a wheelchair for the rest of his life.
As Heagan's hearing, Phil is forced to testify against him. Meanwhile, Fiano shoots and kills a man at a gay bar during an armed robbery, resulting in another controversy at the station.
A man exposes himself to a girl, who happens to be the daughter of court officer, outside of a school. Her father heads to Captain Jonas to ensure that action will be taken against the pervert.
Hector arrested a prostitute, and realizes that she was one of the clowns he arrested in a previous instance.
Jack decides to marry Elena in order to help with the immigration problems she's facing. Meanwhile, a gang war breaks out when a gang raids a hospital in order to kill another gang member.
Jack and Clem are at each other's necks after they fight over Elena. Meanwhile, Santoro lands himself in hot water after trying to help his brother-in-law deal with a bookie.
Donovan reveals a secret to the precinct before it becomes public knowledge. Meanwhile, a landlord arrives at the precinct to get help in evicting some tenants.
Donovan's father arrives in town for a crucial heart surgery, but he hasn't told his son that he had a heart attack. Nona goes undercover, but her cover at a prostitute results in negative comments from the precinct.
Elena is found shot to death and the prime suspect is a Latvian businessman. Meanwhile, Santoro is asked to help his nephew.
A man arrives at the station and tells the police that his boyfriend is threatening to go out on a rampage. Ann-Marie goes undercover to expose a drug ring, but the seemingly easy undercover job goes terribly awry.
It's Ann-Marie's first day as a detective and her first investigation is to look into a claim that two men are manufacturing bombs in an apartment.
A drug dealer is arrested, but he dies at the precinct in his cell. When it is determined that strangulation is the cause of death, suspicions turn to Doyle, the arresting officer.
A Latin Queens member is found dead in her apartment and one of the suspects is an undercover officer.