In the four months since Joey Salvo's assassination, Simone is working odd jobs since he has been suspended by Internal Affairs pending their investigation, while he approaches Sipowicz asking about his and others incitements by the FBI who think that Salvo's death was an inside job within IAB, and Lt. Shannon from IAB tells Lt. Fancy that he may know the person who killed Salvo.

ABC的警察程序剧《纽约重案组 NYPD Blue》是一部从1993年开始播出，持续了12季、多达261集的长寿剧集，它在艾美奖上斩获了多达16个主要奖项。在近期重启/续拍之风盛行的情况下，ABC以试映集制作协议预订了《纽约重案组》的续篇剧项目。 重启版由Matt Olmstead、Nick Wootton及Jesse Bochco（他是旧剧主创Steven Bochco的儿子）负责创作。剧中，旧版角色Andy Sipowitz已经去世，不过他长大后的儿子Theo（由Fabien Frankel饰演）子承父业，成为了一名纽约警探，并在第15小队着手调查父亲的谋杀案。虎父无犬子，Theo和他父亲一样，爱喝酒，但头脑冷静、思维灵活。 Alona Tal饰演女主警探Nicole Lazarus，她的个人生活有些复杂。她正在和丈夫办理离婚手续，而她这位即将成为前夫的人竟然想从Nicole的退休金……

TNT宣布续订《重案组》第五季10集。

"With DCI Gill Murray in retirement, ever-ambitious Rachel (Suranne Jones) returns from her Vice secondment fired up and full of new ideas and initiatives. She’s gained valuable experience and really wants to make her mark as she returns to Syndicate 9’s Murder Squad. Exhilarated to step up to the plate, Rachel is exactly who Janet (Lesley Sharp) and the Squad need to move forward with a terrifying and sinister Internet crime investigation of epic scale and unrelenting horror. Using her Vice authorisation, Rachel accesses a disturbing world where people brag about committing murder and lay down the gauntlet for the next victim. A game of ruthless life or death daring develops, as Scott & Bailey investigate multiple killers with horrifying and everlasting consequences. They will be changed forever and the investigation will take a devastating toll on their private, professional and personal lives." The drama will be executive produced by Nicola Shindler (Happy Valley, Last Tango in Halifax, Banana, Cucumber) founder of the Red Production Company and produced by Michaela Eccleston, Red’s Head of Production. Suranne Jones, who conceived the idea for the drama with fellow actress Sally Lindsay, will also executive produce alongside Nicola. Sally Lindsay also returns to the drama playing Rachel’s sister Alison. 5-1 Rachel steps up to acting DI on a case that becomes more sinister than it first appeared.

While investigating the murders of four teenage girls, the 15th squad discovers the shocking truth about the disappearance of detective Danny Sorenson.

Each week viewers see the gritty reality of life in a New York City Police unit as the officers go about their work with a grim determination. Two partners, Detectives Andy Sipowicz and John Kelley (later replaced by Bobby Simone), are the central characters in this weekly police drama, and personify very different approaches to their difficult job. Sipowicz's brash gruffness (covering an emotional vulnerability) is tempered by the precise and controlled demeanor of the two partners with whom he has worked.

侦探们调查一家快餐店发生的多起谋杀案；一名瘾君子将自己的小女儿交给一名毒贩，以此作为逾期贷款的抵押；内部调查部门重新开启了柯肯德尔案的调查。

At the beginning of the season Sylvia becomes pregnant with Andy's child. A baby boy, Theo, is born towards the end of the season. This is contrasted with the fate that awaits Sipowicz's older son, Andy Jr., who announces that he is to join the police force. Andy is finally bonding with his estranged son when he is gunned down, which leads the elder Sipowicz to fall off the wagon. Andy Jr's murderers are killed themselves by Simone in an act of self defense. Bobby and Diane, whose relationship had been put on hold while she attended AA, resume their relationship only for Diane to begin drinking again when her abusive father beats her mother. Her father is eventually killed and her mother becomes the prime suspect. James Martinez and new detective Adrienne Lesniak begin an affair but only after Lesniak tells Medavoy that she is gay, then that she is not; Martinez later breaks up with her due to her controlling and unpleasant behavior, and Lesniak eventually leaves the squad. Medavoy himself leaves his wife, recognizing that she is holding him back but it is too late to save his relationship with Donna who leaves to take up a job with Apple.

The detectives investigate the torture-murder of a hotel magnate's son. Russell and Kirkendall suspect that an attempted rape victim is hiding something. Simone's health begins to deteriorate.

In the fourth season of this award-winning show, the action at New York City's 15th Precinct is as hectic as ever. While Lieutenant Fancy continues as precinct commander, Detective Andy Sipowicz, although still a bit rough around the edges, has mellowed with the birth of his son. Detective Bobby Simone and Detective Diane Russell take the next step in their relationship, James Martinez becomes the Squad Delegate, and Greg Meadavoy considers becoming a surrogate father. But one thing that hasn't changed is the squad's determination to make sure the bad guys get their day in court and to also attempt to maintain a touch of normalcy in their personal lives even as they investigate cases that often put them directly in the line of fire.