Sergeant Voight tries to find out who is behind the murder of Jin, and come up with the unbelievable discovery and learned that Sergeant Edwin Stillwell playing a double game with the intention of getting out on the surface of the big fish along with Voight. In the meantime, all members of the intelligence departments receive death threats from an unknown group called "Shadow". At several places in Chicago in a fire, explosion, and robbery, for which "Shadow" take responsibility, bringing the city into chaos.
梅兰妮·林斯基,克里斯蒂娜·里奇,托妮·赛普里斯,劳伦·艾波罗丝,苏菲·奈丽丝,贾思敏·萨沃伊·布朗,索菲·撒切尔,考特尼·伊顿,丽芙·休森,斯蒂文·克鲁格,沃伦·科尔,凯文·阿尔维斯,莎拉·德贾斯丁,西蒙娜·凯塞尔,伊利亚·伍德,赛米·汉拉缇,乔尔·麦克哈尔,希拉里·斯万克
内森·菲利安
卡丽·普雷斯顿,卡拉·帕特森,维德尔·皮尔斯,丹尼尔·艾萨克,内森·连恩,Livvy Shaffery,瓦妮莎·贝尔,丹·布卡廷斯基
佩顿·李斯特,Kristian Ventura,麦洛·曼海姆,斯宾塞·麦克弗森,琪拉·皮查多,莎拉·亚金,尼克·普格利泽,雷恩博·韦德尔