Tom Selleck stars as Frank Reagan, the New York Police Commissioner and patriarch of the Reagan clan, a multigenerational family of cops. Frank's oldest son is Danny, a seasoned detective and Iraqi War veteran who occasionally uses dubious tactics to solve cases. Daughter Erin, the lone female, is an assistant district attorney. Fresh out of Harvard Law, Jamie is the youngest member and "golden boy" of the family. Jamie gave up a lucrative future in law to continue the family's tradition in police work, and is asked to participate in a secretive investigation that even his father does not know about.
Frank goes on high alert when a threat to New York City may be imminent following a terrorist attack in the Middle East.
A possible serial-killer case is assigned to Danny and Baez. Erin considers becoming a judge and a mayoral candidate claims that Frank has been secretly investigating her spouse.
When a newspaper reporter is targeted while wearing NYPD gear during a ride-along, Frank thinks the shooter is targeting cops.
One of Erin's informants leaves witness protection to give his former boss an alibi; Frank and the New York City fire department commissioner get into a war.
Danny joins the search for two escaped convicts after learning that one is someone he helped wrongfully imprison.
Camera footage appears to show Jamie committing police brutality at a demonstration; a civil rights attorney claims a rape case includes drummed up charges.
The only remaining Mustang driven by Steve McQueen in 'Bullitt' is stolen; an order from the acting district attorney puts Frank and Erin at odds.
Linda is concerned when an elusive serial killer starts threatening her, Danny and their kids; during a hostage situation, Jamie challenges a superior officer.
DA Investigator Anthony Abetemarco helps Erin when she is forced to take a case from a colleague, ADA Kelly Blake; Eddie and Jamie pose as an elderly couple in order to catch a gang.
Danny is interrogated by the District Attorney's investigator when his ex-partner is accused of planting evidence in order to wrap up a homicide case
Frank worries that a tell-all book about his old cop days will affect his career. Meanwhile, Erin and DA Investigator Abetemarco investigate the murder of another DA Investigator.
A mobster is found shot in his car and his low-level errand boy is tied up in the trunk; an NYPD officer asks for a new shield number - the same number as Frank's deceased son Joe.
Frank deals with the aftermath of a retired cop who shot his mugger. A man Baez saw kill her friend 25 years ago has returned; she and Danny figure out how to bring him to justice.
Four women admit to murder when their boss is killed; Danny and Baez must figure out the real killer.
Erin is overwhelmed with guilt after a man she set free is accused of killing a cop. Danny and Maria investigate a case of a cop who has gone AWOL.
The newest Speaker of NY City Council, (Whoopi Goldberg) wants to dismantle the NYPD's 'Broken Windows Policy,' a position Frank vehemently opposes.
Jamie and Danny disagree about how to handle a reckless NYPD rookie who is the son of Dannys friend.
Frank and Danny try to help a rehabilitated ex-con when he becomes involved in the murder of an enemy; a former prosecutor withholds the location of an alleged killer from Erin.
An officer involved in the controversial shooting of an unarmed person 14 years prior is up for a promotion, forcing Frank Reagan to make a difficult decision.
When a serial killer attaches a message to his latest victim that taunts Danny, their deadly game of cat and mouse becomes personal.
Erin Reagan searches for a missing trial witness who is on the run because of fear of retaliation.
Public outrage erupts when a cop isn't indicted for shooting a teenager; an officer gets shot in a possible case of retaliation, and Danny searches for the shooter.