It's all hands on deck for the Reagan family, as they race to stop deadly mayhem in the city when the gangs of New York unite to demand amnesty and the release of their imprisoned members and those awaiting trial.

When New York City experiences a major blackout, police officers scramble to contain the resulting chaos. Frank uncovers some unpleasant truths about his department. Jamie and Eddie question the line between work and their relationship.

After getting a match from an unknown relative from a DNA network, Sean Reagan does some detective work to figure out who this mystery person might be. Frank gets a personal request from a woman to transfer her son to a safer assignment. Danny seeks to uncover the truth behind the murder of a key witness in one of Erin's cases. Eddie begins to think about having a child after she and Jamie discover a newborn left outside their precinct.

One of the Reagans is shot by a gang member, and Danny pursues a suspect while trying to keep his emotions in check. To add to the complications, Danny has to find an inventive way to bring in witnesses.

When a series of drive-by murders occur after six wrongly convicted men are released from prison, Danny and Baez wonder if they were orchestrated by these men as an act of revenge. Jamie and Eddie find themselves in a life-threatening situation.

Danny and Baez investigate a murder attempt against a celebrated fertility doctor with a seemingly pristine reputation. Eddie must intervene in a Reagan family matter involving Danny's boys. Erin helps Anthony find justice after a date goes wrong.

In his attempt to expose the Blue Templar, Frank chooses to bypass Internal Affairs after a drug bust indicates dirty cops are involved.

After someone breaks into Luis Delgado’s home and kills his wife, Luis and Danny team up to take down the vicious murderer who may also be responsible for Linda’s death. Frank finally meets Eddie’s mother. Jamie and Erin are at odds after Jamie seeks her help charging a man who confessed to him while under the influence.

As Jamie and Eddie's wedding day approaches, Frank worries about the toast he'll deliver at their rehearsal dinner. Erin interviews a witness whose story leads her to doubt Eddie's honesty. Danny and Baez unravel the complicated love life of a young homicide victim.

The Reagans band together to prevent Joe from being killed in the line of duty like his father when they fear that his cover has been blown within the gun-running outfit he’s helping the ATF bring down.

Danny blames himself when a young woman commits suicide because he had made a promise to her in the wake of her parents' deaths. Meanwhile, violence involving a gang at a housing project erupts and affects the Reagans.

As the Reagans rally together to take down the leader of the gang responsible for the murder of someone close to them, Danny looks to the gang leader’s girlfriend to lead them to him. Meanwhile, Frank is left reeling from a second loss.

Danny becomes the lead hostage negotiator when an informant in a large drug case holds Erin at gunpoint inside the courtroom.

Baez gets injured while escorting confiscated drugs, so Danny goes after the drug cartel responsible. A lieutenant with a commendable record engages in controversial behavior, putting Frank in a difficult situation.

Jamie stands up for an officer who is harassed for testifying against her partner. Erin learns her lover may be her boss at the DA's office. Danny asks Erin to file murder charges against a man who shot a 15-year-old girl who ended up dying 8 years later.

Frank is put in a difficult position when Danny is charged with using excessive force. Jamie meets a female doctor, and it makes Eddie uneasy.

Danny takes on a personal case involving a drug cartel member who Danny believes is responsible for torching his house. Erin is given a promotion in the DA's office but finds herself in a challenging situation when both Danny and Jamie ask her for help with their investigations. Frank and Jaime have a disagreement when Jamie refuses to stop riding with Eddie.

Gormley looks to Danny and Baez for help tracking down a former NYPD detective he believes may be a threat to Frank's safety. Erin navigates office politics when she chooses to reopen a closed case. Jamie is transferred to a new precinct with a lot of problems. Frank and Baker team up to investigate a complaint about an SVU detective.

A video surfaces of cops being harassed by a group of people at a housing complex, which leads Frank to order a raid to round up anyone with an outstanding warrant, against Garrett’s advice. Danny is approached by a woman he put in jail who asks for his help keeping her brother out of trouble. Nicky’s new boyfriend has ulterior motives.

When a video surfaces of officers partaking in a clear case of entrapment, Frank focuses on finding the cop who leaked the video. Eddie retaliates against a co-worker who is pranking Jamie. Danny and Baez investigate the murder of a tabloid writer who worked in the hip-hop scene. Erin gives a high-profile case to a young ADA under her tutelage.

Shockwaves ripple through the Reagan family when Danny discovers that their newest family member Joe is working undercover for the ATF to bring down a gun-running organization.

When Frank’s close friend, a high-profile reporter, is almost assaulted while in town investigating a story, Danny and Jackie attempt to track down her would-be attacker. Meanwhile, Jamie’s undercover case comes to a head.

Danny uncovers shocking information while investigating a case against orders.

A woman's abusive boyfriend targets Jamie after he intercedes in a domestic dispute. The press gets hold of an illegal tape capturing Henry's insensitive comments, and Frank must deal with the ensuing scandal.

When the son of Frank's most outspoken critic is murdered, Frank and the boy's father must put aside their differences to seek justice.