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.
汤姆·伯克 荷丽黛·格兰杰 克里斯蒂娜·科尔 雅各布·詹姆斯·贝西克 萨姆·伍尔夫 本·克朗普顿 凯利斯顿·韦勒英 科尔·罗根 阿比盖尔·劳里 杰克·格林利斯 杰西·安皮亚姿 伊恩·雷德福 杰克·莫里斯 凯文·迪恩 Phill Langhorne 查理·普莱斯 皮埃尔·伯格曼 凯特·戴维斯-斯皮克 迪韦恩·托马斯