Common Enemies – 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. Also, Frank finally meets Eddie’s mother, Lena, and Jamie and Erin are at odds after Jamie seeks her help charging a man who confessed to him while under the influence.
Milestones – A former officer waits on Frank at a restaurant, causing him to feel guilty about the circumstances surrounding why she was fired, and he tries to reinstate her. Also, Danny and Baez investigate the murder of a star college basketball player linked to sports betting, Erin seeks justice in an apparent DUI, and Jamie and Eddie pick a wedding venue.
By Hook or By Crook – The drug cartel hitman responsible for torching Danny’s house resurfaces. Also, an attack on an officer in the line of duty directly impacts a member of Frank’s team; Eddie reluctantly introduces Jamie to her mother, Lena; and Erin deals with the consequences of her new role as boss.
Trust – Eddie and her new partner, Maya, clash with Jamie on the job when they fail to intervene in a public dispute at a convenience store. Also, Danny and Baez investigate the death of a college freshman at a fraternity party, and Frank battles a lawsuit when a sergeant accuses the department of reverse racism and ageism.
My Aim Is True – The Season 8 finale: 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 the men as an act of revenge. Also, Frank combats the guilt he feels about these innocent men unfairly serving nine years in prison, and Jamie and Eddie find themselves in a life-threatening situation.
School of Hard Knocks – When a student is shot by a rival gang member in his high school courtyard, Danny and Baez try to get a grasp on the situation to prevent a reoccurrence, but the principal recklessly takes matters into his own hands. Also, Erin tries to help a friend who is mixed up in an illegal gambling ring; and Gov. Mendez tries to frame Frank after one of his top legislative aides is shot by an NYPD officer
Brushed Off – A famous basketball player is found dead of an apparent drug overdose. Danny investigates and looks into the victim’s possible ties to a local drug gang. Meanwhile, Erin revisits the case of a man she may have wrongfully convicted years ago; and Frank is approached by Archbishop Kearns regarding an eviction matter that Jamie and Eddie are working on.
The Forgotten – Danny and Baez investigate the murder of a single mother whose ex-husband has a history of violence. Meanwhile, Frank deals with the fallout when Mayor Dutton eliminates solitary confinement in prisons; and Jamie’s efforts to save a young woman who overdosed on drugs lead to unexpected consequences.
Out of the Blue – Danny and Baez work the case of a detective who was gunned down prior to testifying against a career criminal. Meanwhile, Frank personally investigates when Garrett is attacked by a S.W.A.T. team outside his home; and Erin brings in a confidential informant against Anthony’s wishes.
The Enemy of My Enemy – Erin’s trial against a notorious human trafficker is jeopardized when the presiding judge is mysteriously found dead. Danny and Baez are put on the case to investigate foul play. Meanwhile, Mayor Dutton opposes Frank’s public safety initiative, but City Council Speaker Regina Thomas devises a plan to help Frank bypass the mayor’s veto.