表面上，雪莉（珍妮弗·加纳 Jennifer Garner 饰）是一名普通的大学研究生，实际上，她已为名为SD6的秘密情报组织工作多年。在同男友结婚之际，雪莉决定向其公开自己的真实身份，没想到男友

　　Five months later. Sydney quits the CIA and joins a Black Ops unit called "Authorized Personn

　　Having woken up in Hong Kong, with no memory for the last two years (!), Sydney returns to Los Ang

　　Sydney finds herself face-to-face with her long-lost mother, Irina Derevko, whose intentions for h

After Cragen is accused of murder, the team works secretly around the clock to defend him. Meanwhile