The detectives investigate a multiple homicide at a fast food restaurant; an addict gives his baby daughter to a drug dealer as collateral on an overdue loan; Internal Affairs reopens the Kirkendall case.
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.
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.
1942年,瓜达卡纳尔岛,美军陆战第1师占领了该岛上的日军机场,由此拉开了太平洋战争上的战略对日大反攻。三个美军海军陆战队士兵莱基、斯莱治和巴斯龙在太平洋上经历了二战时期最为惨烈的太平洋战争。在太平洋上,日本陆军骄横狂妄,对美军发起了猛烈的攻势,期间不乏使用自杀式的袭击。从惨烈的瓜达卡纳尔岛战役、格洛斯特角登陆战,及热带丛林战役,贝里琉岛争夺战,到硫磺岛战役直至冲绳岛战役。莱基(詹姆斯·贝吉·戴尔 James Badge Dale 饰)、斯莱治(约瑟夫·梅泽罗 Joseph Mazzello 饰)和巴斯龙(乔恩·塞达 Jon Seda 饰)见证了日军的负隅顽抗直至最后的溃败,也亲眼看到战友不断的在这惨烈的战斗中牺牲。作为最贵的二战美剧,HBO为此耗资2.23亿美元,这也是斯皮尔伯格与汤姆·汉克斯继《兄弟连》之后的再次联手。
艾玛(海伦·麦克洛瑞 Helen McCrory 饰)是一名经验丰富的律师,专门为曾经在法庭上败诉的人们翻案,这也就意味着,她在工作中要承受远远高于其他同行的压力,但这一切对于心中充满了正义感的艾玛来说并不值一提。
这一次,艾玛的客户是一位名叫凯文(萨姆·斯温斯伯里 Sam Swainsbury 饰)的男子,他锒铛入狱已经14年之久了。曾经,凯文被控诉杀害了一位女学生,虽然并没有确凿的证据证明凯文就是凶手,但当时的舆论对于凯文来说非常的不利,迫于压力,凯文认罪了。如今,凯文的儿子已经成长为了青葱少年,始终不相信凯文有罪的他的前妻决定不再让孩子背负父亲是杀人犯的污名。