When Philip and Elizabeth are given an urgent task to plant a bug in Defense Secretary Caspar Weinberger's office, they risk exposure when an unwilling maid of the Weinberger home refuses to cooperate.
A mole hunt within the KGB causes suspicion amongst allies and shatters trust within the Jennings' marriage, meanwhile Stan's plan to keep his mole safe puts her at even greater risk of discovery.
A crucial agent crumbles under emotional distress and threatens to topple a valuable network of KGB informants. Professionally, Philip and Elizabeth are tasked with infiltrating the FBI's new communications encryption system.
In the aftermath of Amador's murder, Gregory finds himself with limited options. As the FBI get closer and closer, Gregory makes his choice, much to Elizabeth's distress.
A German assassin has been ordered to kill American scientists involved in the ABM programme. After the mission is aborted, Phillip and Elizabeth must stop him and prevent a possible war.
