While Annie tries to play nice with an FBI investigator to find out more about a break-in at a high-tech company, Simon unexpectedly shows up in the U.S.
Annie tells Lena that Simon contacted her, and Annie thinks she can get information from him. Joan assigns Annie to help find an Iranian missile that uses American technology. Annie works with Eyal in Israel to find who made the missile.
Auggie sees a therapist to deal with losing Parker. Annie tries to turn the chief aid for the Yemen Prime Minister is in the country for a heart operation. With promises of security, he agrees. Annie finds out she cannot protect his family.
At Jai's safe house, Annie & Auggie find Jai was investigating Simon. Annie tells Arthur & Joan she has been cultivating Simon and thinks she can turn him. Simon says no, but asks Annie to marry him. Simon & Annie are gunned down by Lena.
As the life of one the Agency's best hangs in the balance, the team works to discover the truth after it's revealed that one of their own might not be who they thought.
Lena escapes to Russia. Against CIA orders, Joan gives Annie permission to find Lena. Annie tracks Lena, who then tries to convert Annie as a counter spy. That fails, and Lena tries to shoot Annie. Annie kills Lena in self defense.
Annie convinces the CIA to act on Mossad intelligence she got from Eyal, Arthur confronts Joan on her suspicious behavior, and Auggie's ex-fiancée returns asking for a favor.
After Annie escapes a trap set by Khalid Ansari, Annie and Eyal go to Switzerland to track him down. Meanwhile, Auggie is deployed back to Iraq to help a fellow soldier.
Annie considers betraying the agency to save Eyal, but Auggie comes to the rescue. Meanwhile, Henry Wilcox returns from prison and sets his sights on Arthur and Joan.
