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 political powers that be make big plans for national hero Brody, but his increasingly erratic behavior threatens his media darling status; Carrie grows desperate for evidence linking Brody with Abu Nazir, as Saul directs her to focus on Nazir's money trail.

Brody confronts the lone survivor among the insurgents that held him, leading Carrie to believe she may be proved right about Brody once and for all - but Brody's reunion with his captor surprises everyone; the agency is hot on the trail of the lovers who bought a house near the airport with funds from a stolen necklace.

Reeling after losing key players in Nazir's plot against America, the CIA orders polygraphs on everyone who came in contact with them, including Brody, which Carrie sees as an opportunity to finally learn the truth.

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.

As Carrie and Saul reel from the news that Walker is alive, the intelligence community clashes on the best way to capture him; Brody learns a shocking truth about his captivity.

After his attempt to sever ties with Abu Nazir, Brody finds himself reliving his captivity and recommits to his mission; Carrie finds herself in the middle of a public relations nightmare on the heels of the mosque shooting.

Carrie and Saul identify Walker's contact in Washington but their target has diplomatic immunity; Brody is approached to run for a disgraced congressman's seat in the House of Representatives.

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.

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.

An official inquiry brings Carrie back to the States, where she struggles with her ambivalence towards motherhood. Quinn spirals out of control, while a disgraced former case officer reveals disturbing new information.

Carrie is forced to intervene when Fara fails to recruit a key asset. Still reeling over events in Islamabad, Quinn zeroes in on a potential lead.

Carrie tries to earn the trust of a frightened asset. Saul catches a break when he spots a familiar face. Quinn and Fara stake out a new suspect.

Carrie returns home to the US with Franny to work as an advocate for Muslim Americans. Dar and Saul brief President-elect Keane. Quinn struggles with his new circumstances.

Carrie's meeting with Saad has grave repercussions for Sekou. In Abu Dhabi, Saul interrogates Nafisi for proof of an Iran-North Korea arms deal.

A detail in the wreckage catches Quinn's eye. A lapse in Carrie's judgment endangers her child. A mystery emerges from the recording Carrie received.

Carrie gets a troubling call from Franny's school. Dar plots to prevent Javadi from reporting his findings to Saul. Quinn learns he's part of a deal.

Javadi leaves an unexpected gift behind. Max infiltrates the shady company where Conlin was last heard from. Quinn sets off on a revenge mission.

Carrie and Quinn make a discovery while Keane makes a decision and Max finds trouble.

Carrie and Franny are living with Maggie's family in DC. Saul and the federal employees detained after the attempt on the President-elect's life are in prison. President Keane's administration comes under scrutiny.

Keane is forced to make a show of good faith. A visit to a psychiatrist leaves Carrie rattled. Hidden cameras capture a new face in Wellington's home.

The parking ticket leads Carrie to a series of transactions. O'Keefe loses control of the situation at the compound, and an outsider spreads a rumor.

A still-recovering Carrie is sent to Kabul to help secure a peace deal with the Taliban. Elsewhere in Afghanistan, Max embarks on his own risky mission.

After Saul warns Haqqani that there's a mole in his camp, the Taliban leader summons his son. Carrie receives a mysterious invitation from Yevgeny.