Unwritten Rules

When an armed robbery ends with the death of a police officer, Frank makes it a mission for the NYPD to bring the suspect to justice.

When a famous movie star is stabbed, Danny goes to his aid, but he must keep the crime on the down-low due to Russell’s celebrity status.

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

Danny and Baez investigate the death of a teenage girl who appears to have been pushed in front of a subway car by a homeless man.

When Danny and Baez suspect a little girl might be the victim of a kidnapping, the girl’s mother denies it, but her story doesn’t add up.

When a gangbanger dies after Jamie chases him away from the boy he is mentoring, Jamie’s conduct is called into question.

When an officer is accused of using excessive force on a suspect, Frank finds his department under scrutiny from the community and the mayor.

Following Frank’s dinner with mob lawyer Angelo Gallo, Gallo is shot, and Frank narrowly escapes with his own life.

Danny and Baez investigate a homicide in which Baez’s estranged brother, a former drug addict, is the lead suspect.

Danny and Baez investigate a local bombing, but meet with tension and resistance from the community during the investigation.

Danny’s loyalty is tested when he is assigned to the case of a childhood friend, Mickey, who is under investigation for having ties to an infamous mob family.

When Danny learns from Nicky that there’s a deadly new brand of heroin hitting the streets, he begins an all-out manhunt for the distributor.

Danny and Baez must track down a Marine veteran who Danny thinks is suffering from PTSD. Meanwhile, Frank is caught off-guard during a press conference.

Danny and Baez investigate the murder of Tiffany Lamp, a popular drag queen from a reality television show who was found murdered in a local park.

When Danny and Baez investigate the kidnapping of a young girl who disappeared after school, it brings back difficult memories for Danny, who worked on a similar unsolved case many years ago.

When Danny takes a call from a woman who is threatening to kill herself along with the man who killed her parents in a drunk driving accident, he rushes to find her.

Danny and Baez investigate when an expectant mother is a victim of a “knockout game,” in which teenagers punch unsuspecting civilians in the head.

Danny and Baez investigate the death of a woman whose body was dumped after she was killed by a lethal dose of lidocaine following secret plastic surgery.

Danny and Baez investigate the murder of a respected college professor who was involved with a questionable scholarship program.

When Erin is assigned to investigate a case in which an on-duty police officer is accused of killing a suspect already in custody.

When a detective from Danny’s precinct is killed while working undercover, Frank puts on a full-court press to find his killer, only to discover that the deceased had a big secret.

When Danny is placed on modified duty after investigating a case that was off-limits, he realizes he stumbled upon something that someone is trying to keep quiet.