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.

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……

LAPD重案组继续工作，之前谋杀Rusty的杀人狂逃离美国，不知第四季长线要如何安排。组员们在此季中归来，实在让喜欢它的观众倍感兴奋。 从Closer发展出的衍生剧，没想到该走脉脉温情路线后仍然凭一票老戏骨演员撑起了此剧，不是大红大紫，但让人看了温暖。

Janet is promoted to sergeant but steps down to give it to Rachel as she feels she is needed more at home. The pair join the search for eighteen year old Robin McKendrick, a simple lad reported missing by his boss, landlord John Rivington. Pub regulars are unforthcoming until a boy called John tells Janet that an ex-soldier known as Jackie-Boy locked Robin in his car boot as a cruel prank. He later reported the car as stolen. Another witness claims that Jackie- Boy dumped his car in a quarry with Robin still in the boot. In the process of the investigation Gill identifies another body found in the river, that of Mandy Sweeting, who disappeared two decades ago.

狄仁杰、李元芳、杨戬、扁鹊四人受女帝所托，成立峡谷重案组维护王者峡谷的秩序，但是诡谲的案件接连不断，李元芳和杨戬甚至无辜受到暴君的攻击直至昏迷。真相看似毫无遮掩实则扑朔迷离。李元芳与杨戬平安醒来，重案组似乎回到了平稳的日常。但峡谷里暗流汹涌未曾停歇，黑幕仍未分明。敌暗我明，狄仁杰要如何带领众人破局？

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.