表面上，日韩雪莉（珍妮弗·加纳 Jennifer Garner 饰）是一名普通的大学研究生，日韩实际上，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，没想到男友却因此被组织的安全人员暗杀。愤怒中，雪莉选择了“罢工”，之后亦遭到了抹杀。危机之中，雪莉知道了自己的父亲杰克（维克托·加柏 Victor Garber 饰）也是和自己一样的秘密特工，并且，在背后扶持SD6的并非国家组织，而是拥有强大武力的反动分子。于私于公，雪莉和SD6都有着不共戴天之仇，她回到了SD6，但此时，雪莉的身份已升级成了为CIA工作的双重间谍，在危险和考验之中，雪莉的任务只有一个，那就是彻底铲除SD6。
安室奈美惠
回复 :在上一季中，朗娜由于用元素石自卫，而杀了人...元素被污染引发了流星岩直接撞击地球一个小镇---史摩维尔。朗娜逃亡中不幸坠机后究竟看到了什么？而另一方面，克拉克无故消失在洞穴中却出现南极腹地...克洛依和ＬＥＸ究竟发现了克拉克的秘密没有呢？...在这一季中，一切迷团的答案....
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