After missing and presumed dead for eight years, Marine Sergeant Nicholas Brody is rescued in Iraq, and returns home to his family. But CIA agent Carrie Mathison suspects he might have been turned by his terrorist captors, and believes he could be part of a plan to attack America.

Carrie receives new evidence from an undercover agent and stays glued to the surveillance footage of Brody's home, which reveals a man struggling with his traumatic memories.

The relationship between Carrie and Brody becomes more complicated when they head into the countryside for the weekend, while Mike and Jessica face the fallout of the truth about their relationship, and Saul catches Aileen on the run to Mexico.

While Carrie is near catatonic and confined to bed, Saul investigates the unsettling implications of her timeline; Walker secures a perch for his mission; Brody makes his final preparations for the Vice President's policy summit at the State Department.

Brody has been elected to Congress. A woman named Roya comes to see him, and asks him to steal a list of homeland targets from Estes's office safe. Carrie is working with the CIA again because Fatima, an informant married to a man working for Abu Nazir, tells Saul that she'll only speak to Carrie. Estes goes to pick up Carrie at her sister's house, and then she's sent to Cyprus, where she's prepped for a brief mission in Lebanon.

Fatima tells Carrie about a meeting her husband - a Hezbollah commander - will be having in Beirut with Abu Nazir, and Carrie and Saul call Estes to tell him and to request a special forces team to capture Nazir.

He lies for Carrie. He lies for Roya. And he's still lying to Jessica. Brody heads towards a serious meltdown as he struggles to keep his complicated alliances clear. Against Quinn's orders, Carrie stages a risky intervention to keep Brody in line, forcing both of them to confront their mixed emotions. Meanwhile, Dana turns to an unlikely source for comfort.

Carrie is faced with a pivotal decision, while Brody meets with Faber to contemplate the future of the family. Meanwhile, Saul undertakes a secret assignment; and Quinn has a decision to make that may prove to be a game-changer.

Saul begs Tasneem for any intel she can get on where Jalal might be hiding. An unlikely ally helps Carrie find a lead on the rumored Kremlin spy.