The Reagans weigh the rights and wrongs of vigilantism when a good Samaritan who has a police record takes action against a terrorizing subway criminal.

Erin, Frank and Danny work together within the system to find justice when a rape case's primary suspect is protected by diplomatic immunity.

Frank mobilizes the entire NYPD to find the killer of a police officer who was murdered after a diamond heist.

A radical, Islamicized American wife is distraught that her divorce has given custody of their son to the father. She hooks a bomb to her car so that the entire family dies. Danny investigates Arabic emails and defuses the situation.

When Erin tries to take down a gang leader via his law-abiding brother, the family debates her methods.

When an assassination attempt is made on Frank's life, Danny goes on a hunt to track down the shooter and find out if the attack was random or by someone with a vendetta against the Commissioner.

Danny chances upon a fatal shooting outside a store. His investigation reveals that the shooter is a Peruvian mob boss. The police arrest this killer but Danny's wife is kidnapped, to pressure him not to testify. His wife is then rescued.

When Linda's runway model niece and another model collapse at a fashion show, Danny and Jackie immerse themselves in the cut-throat world of fashion to find the culprit who poisoned them.

When an officer is accused of using excessive force on a suspect, Frank finds his department under scrutiny from the community and the mayor.

Following Frank's dinner with mob lawyer Angelo Gallo, Gallo is shot, and Frank narrowly escapes with his own life. Meanwhile, Danny is called for jury duty, and winds up being the sole dissenting opinion in a murder trial.

An investigative journalist refuses to give up a source who admitted to committing murder.

When NYPD Deputy Chief Donald Kent and his wife are gunned down in an apparent gang hit, Frank orders the whole department to scour the city for his friend's killer.

When a newspaper reporter is targeted while wearing NYPD gear during a ride-along, Frank thinks the shooter is targeting cops.

Camera footage appears to show Jamie committing police brutality at a demonstration; a civil rights attorney claims a rape case includes drummed up charges.

Linda is concerned when an elusive serial killer starts threatening her, Danny and their kids; during a hostage situation, Jamie challenges a superior officer.

Frank deals with the aftermath of a retired cop who shot his mugger. A trainer flouts authority, mingling with Janko. A man Baez saw kill her friend 25 yrs. ago has returned; she and Danny figure out how to bring him to justice.

Four gorgeous women used in a local brothel admit to murdering their evil boss. Danny and Baez must figure out the real killer. Frank and his priest argue over mercy in the Catholic Church while Nicky Reagan-Boyle gets in drug trouble with her friends but no one takes the blame.

The newest Speaker of NY City Council, (Whoopi Goldberg), a chronic malcontent, wants to dismantle the NYPD's "Broken Windows Policy," a position Frank vehemently opposes. Erin worries when the wife of her good friend and mentor, Judge Wilson, dies as a result of DUI, and, his sentencing suddenly runs off the rails. Linda's co-worker at the hospital has a problem with her ex-husband. Linda asks Baez and Danny to talk to the parties involved and it turns into a big ordeal. Judge Wilson takes on attorneys who dare to argue with the bench (i.e. our jobs); it may be time for a Judicial Ethics Commission Complaint. Does Erin have the balls to file one?

When serial killer Thomas Wilder (Louis Cancelmi) attaches a message to his latest victim that taunts Danny, their deadly game of cat and mouse becomes personal for Danny.