介绍：故事发生在三个月之后，Morgan（去伦敦执行奥运会安保任务）和Garcia（帮助Prentiss搬入新家）从英国归来，发现身边多了一个人——长期在联邦调查局工作的语言学专家Alex Blake正式加入BAU调查组Alex天不怕地不怕，曾因为和Strauss的矛盾而闹得满城风云。Garcia对这个新来的女人并不看好，但Alex高超的技艺最终让她转变了观念。这是好事情——BAU调查组必须明白「团结才是力量」的道理，否则他们无法面对本季的新威胁。在首集结尾观众会看到，某个反派角色不仅一直在嘲弄他们、骚扰他们，甚至在追猎他们。直到本季的季终集，BAU调查组才有机会与这个狡猾凶悍的对手展开正面对决。

介绍：To catch a criminal, you have to think like one.

介绍：16岁的Rae Earl（莎朗·鲁妮 Sharon Rooney 饰）为人风趣，喜欢音乐基本和普通这个年纪的女孩并没有什么不同。当然，除了，有那么一点胖。因为这一点，她常常给同学叫做“胖妹”，也因为这点，她有时很害怕和外界接触，总是独自呆在家里。有时还会因为 这个原因和独自抚养她长大的妈妈吵架。但这个胖姑娘还是和普通女孩一样，看到帅哥会犯花痴，遇到陌生人会有那么些尴尬。　　最重要的问题是，Sharon刚从一个特殊的地方回家——精神病院。但她答应了自己和妈妈一切都会好起来，她要勇敢的对面生活的爱情。究竟这个胖妹会带来一段如何经常的生活日记呢？

介绍：Rae is pleased to have the apparently fearless Liam as her best, platonic friend, but is surprised that he wants to keep his group attendance secret. This spells trouble for Rae when Liam's violent girlfriend Amy, said to have been expelled from her last college for assault, threatens her and wants to know why they spend so much time together. She gives her until Friday. Liam refuses to tell Amy the truth but Rae sees he is not so tough when he breaks down and they kiss. Archie is also given the ultimatum by www.2kyb.com Lois to come out by Friday or else she will expose him. He suggests to Rae they run off together but she dissuades him and is pleased when Finn, anxious to resume a non-sexual friendship, offers to teach her self-defence. Come Friday Archie confesses to being gay to generally positive reactions whilst Amy crumbles when Rae tells her she kissed Liam. Back home Mum explains to Rae that she is converting to Islam as Karim, now a lollipop man, wants their baby born into the religion.