When a famous movie star, Russell Berke, who shadowed Danny for research on his next role, is stabbed, Danny goes to his aid, but must keep the crime on the down-low due to Russell's celebrity status.

Eddie and James attempt to steal a collar from a pompous detective. An officer is outed and his partner refuses to ride with him. Danny and Baez are asked to work with new partners. Elsewhere Frank speaks out about equality on the force.

A woman who was held hostage resists pressing charges, but Danny and Baez want justice for her. Meanwhile, a high-profile NYPD fund-raiser uses a phony police vehicle to avoid traffic; and Jamie has the opportunity to be a technical adviser on a TV show.

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.

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.

Frank receives an order from the mayor to attend a parade honoring a man who served time for conspiring in an attack against the police. Meanwhile, Danny investigates the return of a teen who suspiciously disappeared 13 years ago; and Jamie and Eddie help a young woman they believe is being exploited by a congressman.

Danny and Baez join a narcotics task force to track a drug supplier; Baez comes into contact with drugs and gets an accidental overdose; Jamie and Eddie work to protect a rehabilitated sex offender; Frank forms an unlikely alliance with Mayor Dutton.

Frank locks horns with a data-tracking company when it refuses to unlock a terrorist's phone that may hold information regarding upcoming targets; Erin obtains information about an impending murder from a shady source; a woman kidnaps a baby.

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. Anthony ignores Erin's orders to drop an assault case. Frank holds an emergency drill for his inner circle. Jamie and Eddie navigate their changing work-life dynamic

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, and Jamie visits Eddie's father, Armin, in prison.

Frank and Erin are at odds when Frank learns the D.A.’s office keeps a list of “unreliable” cops. Also, Danny and Baez recruit retired mobster Vincent Rella to assist in an investigation, and Jamie participates in a decoy operation to take down a predator posing as a ride-share driver.

Frank works to vindicate Detective Douglas McKenzie, a detective accused of using excessive force. Also, Danny and Baez track down the killer responsible for the death of a rapper’s bodyguard. Jamie is skeptical about a relationship between Espinoza and a new rookie officer, Sarah Brooks; and Eddie goes undercover to help Erin investigate a mysterious cult.

Frank must uncover the truth when an undercover officer accuses a fellow cop of police brutality. Also, Danny and Baez investigate the murder of a famous photographer recently accused of assault by his former models, and Erin struggles to protect a witness as new justice reform laws go into effect.

Danny and Jamie combine forces to convict a notorious drug lord, as Erin nervously awaits the Governor's selection for the new District Attorney. Also, Frank and his grandson, Joe Hill (Will Hochman), face a difficult decision as they navigate their new and complicated family ties.

Eddie and her partner, Officer Rachel Witten, are heralded for their bravery for stopping an active shooter, until a civilian comes forward to accuse them of faking the incident as part of a government conspiracy.

Frank causes family tension when he assigns Jamie to guard Danny after a hit is put on him; Frank tries to stop his grandson from seeking revenge after he’s attacked; Eddie gets a hostile new partner.

Frank contends with public outcry to defund the NYPD School Safety Division, after a physical altercation between a school officer and a student goes viral; Danny and Baez help a father track down his missing ex-wife and daughter.