10将引入另一条长期故事线意即引入一个和8「复制者」The Replicator类似的「未知对象」unsub詹妮弗·洛芙·休伊特从本季开始扮演FBI探员Kate Callahan她将填补Blake离去后留下的空白行动分析组在调查一个连环杀人案这个时候一位新的探员Kate Callahan加入团队中
Lindsay gets suspicious when Rebecca seems to be secretly awaiting an important letter and realizes just how much she was right when the letter finally arrives Ellenor gets a hysterical call from a client, who ran over a man in the street while drunk, and is shocked to discover exactly who he hit Hellen prosecutes two boys accused of rape and murder, each accusing the other, and ends up making a deal with the wrong one
