Tom Selleck stars as Frank Reagan, the New York Chief of Police. Frank's eldest son Danny is a seasoned detective, family man, and Iraqi War vet who on occasion uses dubious tactics to solve cases.

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 an off-duty police officer who was murdered during a diamond heist.

The Reagans argue the pros and cons of profiling as Frank, Danny and the rest of the NYPD search for a bomb that is about to detonate in Manhattan.

Danny works to discover the source of a deadly narcotic after three teenagers die from a drug overdose.

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

Frank Reagan tries to protect his son Jamie Reagan after hearing he witnessed a crime in progress.

The life of a Reagan is put in danger when three dangerous criminals are released from prison.

When a doorman at a New York City hotspot is murdered, Danny returns to investigate the nightclub scene he left behind years ago. Meanwhile, Frank makes a decision about an ex-partner's future.

Danny and Jackie investigate the murder of a high-end escort found floating in the river.

When the son of a Russian gangster is killed at his own engagement party, Danny delves into the world of the Russian mob and the family politics that exist. Meanwhile, Erin is thrown into a high-profile corruption case.

When an undercover counter-terrorism agent is shot, Frank assigns Danny to the case because he is the only officer he can trust given the victim's involvement with infiltrating a sleeper cell.

When a young girl is kidnapped and held for ransom, Danny and Jackie place her drug-addicted boyfriend at the top of their suspect list. Meanwhile, Erin and her boss, Charles Rossellini, take their flirtatious banter a step further.

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.

When a young girl is found murdered at a debutante ball, Danny and Jackie look to the prostitute found giving her a hard time on the hotel's surveillance camera for clues. And Nicky gets a glimpse of her first murder victim.

When a former U.S. Marine and war hero-turned-homeless man is found murdered, Danny, a former Marine himself, feels a personal connection and is determined to find the killer.

After Danny witnesses a murder by a drug lord with a history of intimidating witnesses, a member of his family is put in jeopardy in an attempt to keep him from testifying.

When Linda's runway model niece and a reporter both 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 a tourist is shot outside a hip Lower East Side restaurant, the media sensationalizes the murder, much to Frank's frustration.

When a family down the street from the Reagans is murdered, their drug-and-alcohol-addicted son is the prime suspect.

When a drug bust points to dirty cops, Frank decides not to involve Internal Affairs in the hopes of taking down and exposing the Blue Templar.