美苏冷战期间，里根刚刚当选美国总统后不久，一对前苏联克格勃间谍奉上级指令潜伏在美国首都华盛顿郊区伺机收集军政情报。伪装成一个美国式家庭——丈夫Philip，妻子Elizabeth，与一对不知道自己身事的子女13岁的女儿Paige和10岁的儿子Henry一起生活。FBI探员Stan乔装成平民搬到他们隔壁对其展开调查。而同时，他们的关系随着时间的推进越来越亲密和真诚，但是冷战的升级和间谍组织对他们保持的关注和监视也在考验着他们之间的情感。更关键的是Phillip越来越适应美国的生活价值观和思维方式。
Alex O’Connor是一位年轻的、充满理想主义的中情局分析师，专门负责研究俄罗斯情报。他是一位狂热的爱国者，对国家和家庭极度忠诚，但他做梦也没想到自 己最亲密的家人竟然隐瞒了一个惊天大秘密。一旦真相暴露，这个家庭可能落得个分崩离析、满门抄斩的下场。Alex的父亲Mark（Scott Cohen，《难得坚强》）和母亲Katya（Hope Davis，《新闻编辑室》）都是潜藏在美国境内的俄罗斯间谍，二十多年前因为前苏联解体而不再执行任何任务。因为某种原因，俄罗斯情报部门重新征召并 「激活」了他们，让他们在美国境内继续从事间谍活动。
冷战时期，一个叛变的克格勃泄露了代码为Operation Glass的惊天阴谋，于是颇具魅力但又偏执的MI5头儿，集结了Sarah，Jim等手下去调查真相。而另有一位叫Joe的探员加入，他天才却爱制造麻烦，能从细节读出人性。
冷战时，全球两大特工组织——俄罗斯“中心”与英国“圆场”明争暗斗。总管发现情报局内部潜伏着一名克格勃，怀疑对象就是包括总管助理乔治在内的几名情报局核心成员：锅匠，裁缝，士兵，穷人，乞丐。老总为查清事情策划了一次跨国间谍活动，结果惨遭失败，不久就在内部权力倾轧中失利引退。同时，也连累一批情报官员被清洗出局，其中也包括被提前退休的乔治。乔治本来有重大嫌疑，英国内阁办公室谍报总监排除了嫌疑，委托他调查内奸。于是乔治开始分别走访故人。一时间，圆场疑云密布，人人自危，究竟谁才是“地鼠”……
故事从Kim Philby (Pearce饰)与MI6同事兼密友Nicholas Elliott (Lewis饰)的复杂关系出发，讲述了Philby这位MI6和KGB双面间谍的叛变。
The struggle of Soviet and American intelligence agencies during the Cold War era
Amidst the thaw of glasnost, the Kremlin discovers that two Soviet agents, sent to England under deep cover in 1965, have been "lost." A beautiful and ambitious Russian agent, sent to London to track them down, becomes embroiled in a tangle of CIA, KGB and MI-5 plots and counter-plots as the two lost agents, now utterly assimilated, try to avoid detection.
In 2004, shortly before Estonia's accession to NATO, the Russian intelligence service is approaching Alfred Vind, an official of the Estonian Ministry of Defense ...
On April 26, 1986 Reactor 4 of the Chernobyl Nuclear Power Plant exploded, releasing clouds of radioactive fallout into the atmosphere. With access to hundreds of declassified KGB documents, Chernobyl: The New Evidence reveals the serious concerns of the KGB, the sacrifices the Soviet leadership were willing to make to keep the story quiet and the bravery that saved the world from an even more deadly disaster.
1950s. Under the communist regime, a struggling actor joins the KGB as an informant to make ends meet. He quickly finds himself caught up in a dangerous web of deceit and treachery.
Betray your country, save the world. Spies and traitors play a dangerous game in the 1980s as the Cold War brings two superpowers to the brink of nuclear war.