Zaprzysiężeni

Danny takes on a personal case involving a drug cartel member, Louis Delgado, who Danny believes is responsible for torching his house, and Erin is given a promotion in the DA's office but finds herself in a challenging situation.

Gormley looks to Danny and Baez for help tracking down a former NYPD detective he believes may be a threat to Frank's safety.

While investigating a case involving a woman who shot her husband while she was drunk, Danny's instincts tell him there is more to the story.

When New York City experiences a major blackout, cops scramble to contain the resulting chaos, and Frank uncovers some unpleasant truths about his department in the aftermath.

Danny and Baez investigate a murder attempt against a celebrated fertility doctor with a seemingly pristine reputation. Also, Eddie is called to intervene in a Reagan family matter involving Danny's boys.

Eddie and her new partner, Maya (Yasha Thompson), clash with Jamie on the job when they fail to intervene in a public dispute at a convenience store.

Things get personal for Danny when Luis Delgado (Lou Diamond Phillips), the drug cartel hitman responsible for torching his house, resurfaces. Also, an attack on an officer in the line of duty directly impacts a member of Frank's team.

Erin and Frank clash over new legislation from the district attorney's office that undermines Frank's policies. Also, Erin is at odds with Governor Mendez (David Zayas) over questionable sex-trafficking laws.

When a video surfaces of cops being harassed by a group of people at a housing complex, Frank orders a raid to round up anyone with an outstanding warrant, against Garrett's (Gregory Jbara) advice.

When a video surfaces of officers partaking in a clear case of entrapment, Frank focuses on finding the cop who leaked the video. Also, Eddie retaliates against a co-worker who is pranking Jamie.

Frank questions whether a run-in with community activists was an accident or a setup. Also, Jamie strives to rely less on Frank's input to makes decisions, Erin helps Anthony protect his daughter and ex-wife from a dangerous psychiatric patient.

After a former officer waits on Frank at a restaurant, he feels guilty about the circumstances surrounding why she was fired, and he tries to reinstate her.

A medium approaches Danny and Baez claiming to know what happened to a woman who was found dead of an apparent suicide. Also, Jamie and Eddie help a woman who bought cheap insulin online that nearly killed her son.

It's Reagan versus Reagan when Danny goes against Jamie's direct order during a hostage negotiation. Also, Nicky asks Erin for help when her friend is in jeopardy of losing his scholarship because of a crime he didn't commit.

While off duty, Danny encounters a gas station robbery in progress and is forced to use his weapon, leaving him shaken and his family and co-workers concerned.

After a woman is murdered in her apartment, Danny and Baez turn to her daughter, Margo (Lyrica Okano), for help, but instead she complicates the investigation.

Frank's longtime friend Lenny reveals to him that an upcoming exposé will air some of the NYPD's dirty laundry. Also, Erin must decide how to charge a doctor whose experimental treatments led to the death of his terminally ill daughter.

After an incident where Officer Witten's (Lauren Patten) backup physically could not keep up with a chase, Frank must decide whether to implement a more rigorous fitness test for the NYPD.

After someone breaks into Luis Delgado's (Lou Diamond Phillips) 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.

Erin must convince Frank to back a new state police bill as part of a bargain she made with Governor Mendez (David Zayas). Also, Danny and Baez pursue the same perp twice after the DA's office is unconvinced by their initial lineup.

DNA evidence in a murder case leads Danny and Baez to identical twins with identical alibis. Also, Frank learns Nicky is interviewing for a job at the Justice Coalition, which he rarely sees eye-to-eye with.

As Jamie and Eddie's wedding day approaches, Frank worries about the toast he'll deliver at their rehearsal dinner. Also, Erin interviews a witness whose story leads her to doubt Eddie's honesty.