Danny’s world is rocked when Robert Lewis in the Attorney General’s office obtains new evidence against him in the self-defense shooting case of serial killer Thomas Wilder. Also, Jamie and Eddie respond to a car crash involving a high-profile drunk driver, and Frank is asked by Grace Edwards , the wife of a slain police officer, to keep her only son out of the police force, on the seventh sea...

Danny and Baez investigate the death of an elderly woman who was shot in her home by a stray bullet. Also, Frank faces ridicule from his department when he disciplines a disrespectful cop, and Erin steps in to help her detective, Anthony.

Danny and Baez are determined to get justice for a traumatized young woman who was held hostage, despite her resistance to press charges.

Intent on bringing justice to Lieutenant Gormley after he is beaten by a mob outside his home, Danny and Frank enlist the aid of Detective Anthony Abetemarco, who has a personal connection to the neighborhood where the attack occurred.

Erin and Anthony try to prevent the deportation of a prominent community activist, Coryna Garza (Judy Reyes), who isn’t a citizen, and Frank must decide if the NYPD will participate in the U.S. Marshals’ high-profile raid of a local gang.

As Frank contends with a whistleblower within the NYPD who claims to have evidence of abuse of power in the organization, Danny and Baez investigate the case of a woman who was struck by a car under suspicious circumstances.

When a key witness in Danny’s case is killed just before testifying, Erin angers Danny by enlisting Anthony to help him find the killer. Also, Robert Lewis tries to force Frank to publicly support the Attorney General’s investigation of the use of excessive force by police, and Eddie and Jamie get the call for an attempted suicide.

After Emily Harrison tells Danny and Baez she’s concerned her abusive ex-boyfriend will repeat his behavior with his new girlfriend, Emily becomes the prime suspect when he’s murdered. Also, Eddie gets jealous when Jamie lets a young woman crash at his apartment, and Frank must decide how to discipline a sergeant after he fails to intercede during an armed robbery while off duty.

Frank is left with minimal information to find a missing boy when a conflicted priest who could help won’t break the seal of confession. Also, Danny and Baez investigate the death of a prominent New York City socialite with a secret life, and Jamie and Eddie attend a wedding together.

When the son of Frank’s most outspoken critic in the African-American community, Reverend Darnell Potter, is killed, Potter must put aside his contentious relationship with the Reagan family in order to get justice for his son. Also, Erin and Anthony investigate when a convicted felon’s cause of death is inconsistent with injuries he sustained during a prisoner transport van accident, and Jami...

When Eddie and Jamie become overly involved in a complicated adoption case between the birth and adoptive parents, they ask Erin to help them settle the dispute without going to court. Also, Frank looks into reports of NYPD cadets cheating on their psychological exams, and Danny learns that Jack plans to enlist in the Marines after graduation.

When Danny accepts a side job as a bodyguard for a recently released ex-con who took the fall for someone else, he uses the opportunity to go after the real criminal. Also, Gormley’s wife, Sheila (Cady Huffman), asks Frank to give Gormley a bigger command position, and Jamie and Eddie witness a lovers’ quarrel between two cops that leads them to reflect on their own complicated relationship.

When diplomatic immunity complicates a child abuse case for Danny and Baez, Frank intervenes, despite not having jurisdiction on the case. Also, a robbery occurs while Eddie and Jamie are on a double date with Eddie's boyfriend and his sister, and they are forced to step in.

While investigating the murder of a gang leader, Danny and Baez learn the accused shooter is an ex-con who is romantically linked to his parole officer, who might be assisting in a cover up. Also, concerned the murder might spark further violence, Frank steps in to mediate but must deal with Mario Hunt , the rival gang leader who killed a police chief two years ago.

While investigating the murder of a man who killed a mother and son years earlier while driving drunk, Danny and Baez are torn between doing their job and finding justice after discovering the connection between the suspect and the victim. Also, Anthony is conflicted when Erin asks him to wear a wire to incriminate his old friend who is involved with the Russian mob.

When Linda's brother, Jimmy (Kevin Dillon), gets into trouble with the mob, he begs Danny to help him stay safe until it blows over. Also, Frank faces a public relations nightmare when the lawyer of a wrongfully arrested man demands that NYPD officers' disciplinary records be made public, and Nicky goes on a ride-along with Jamie.

Jamie and Eddie suspect foul play when they respond to a distress call from a woman having an allergic reaction to her lifesaving medication, and learn that her husband is an EMT assigned to take her call, but didn't respond.

Danny investigates the circumstances of an ex-NYPD officer who goes missing the day after she revealed to him that she had planned to make amends to the woman she and her partner wrongfully convicted years ago.

Erin faces off in court against her ex-husband, Jack, who is representing the person she is attempting to convict of murder. Also, Danny and Baez investigate to see if the husband is behind the murder of his own wife; Frank is confronted by a mother who accuses the NYPD of being negligent in solving her son's murder; and Jamie rides with a new partner, Officer Brenda Patimkin.

After Reggie Wilson, a witness in a former case of Erin’s, asks her for help shutting down a drug operation in his apartment building, she makes it her mission to make the building safe for his family. Also, while investigating a teen’s suicide, Danny and Baez uncover information that suggests the death was a homicide, and Frank looks into potential misconduct in the Mayor’s office.

Danny and Baez team up with two Russian operatives to search for a dangerous Russian man who entered the U.S. on a diplomatic visa. Also, Frank gets involved in a sensitive case involving Archbishop Kevin Kearns (Stacy Keach), and Erin and Anthony scramble to find out who tampered with evidence in one of their cases.

When Danny intercepts a shipment of several million dollars that was heading to a drug cartel in Mexico, he becomes a target when they come back for revenge. Also, Jamie works independently to track down a serial killer who preys on the elderly, and Mayor Poole confides in Frank that he plans to retire, on the seventh season finale.