SergeantVoighttriestofindoutwhoisbehindthemurderofJin,andcomeupwiththeunbelievablediscoveryandlearnedthatSergeantEdwinStillwellplayingadoublegamewiththeintentionofgettingoutonthesurfaceofthebigfishalongwithVoight.Inthemeantime,allmembersoftheintelligencedepartmentsreceivedeaththreatsfromanunknowngroupcalled"Shadow".AtseveralplacesinChicagoinafire,explosion,androbbery,forwhich"Shadow"takeresponsibility,bringingthecityintochaos.

精选短评：新来的那个男巡警啊，个人能力不错，但用俺们中国人的话说，就一扫把精啊，介绍队友工作，队友卷入谋杀案；和搭档巡逻，产生情感纠纷被换区；和新搭档巡逻，新搭档又挨枪子……