A trade with the Taliban for Saul's life angers Lockhart, forcing Carrie to improvise to salvage her mission. The CIA closes in on a security leak.

A chat with Carrie's sister makes Saul suspicious. Seeing no other way to stop an imminent war, Carrie steels herself to carry out a plan against Saul.

The security breach has far-reaching consequences as Carrie and Saul get caught in an attack on their convoy and Haqqani's men infiltrate the embassy.

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.

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.

Carrie and Quinn organize a last-ditch operation. Saul extracts a painful promise from Carrie. Lockhart and Martha stall the ISI.

Carrie follows a clue found on Quinn. Saul tries a new tactic to get Faisal to reveal info on the impending terror plot. Allison gets secret orders.

Brody finds himself prisoner again, but this time it's on American soil. Meanwhile, Carrie is forced to play second fiddle after her rash judgment call at the hotel as Estes is busy keeping Jessica off their trail. Dana's relationship with Finn goes to the next level when their date night turns deadly serious.

The BND uses a ruse and Saul's intimate relationship with Allison to prompt her to lead them to her handler. Quinn learns his captors' true intent.

Max's expertise is needed for a rescue mission. Carrie notices something suspicious on the flight manifest. G'ulom launches a manhunt for Haqqani.

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.

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.

While Quinn takes an objective approach, Carrie puts her operation in motion and her life on the line to prevent a terrorist strike.

President Warner arrives in Afghanistan to make an announcement to the troops — and the world. Samira gets an upsetting visit from her brother-in-law.

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.

When the embassy is evacuated and Quinn resists leaving Islamabad, Carrie puts her life on the line to get her whole team out of Pakistan.

Carrie tells the helicopter mechanic what was on the black box. Yevgeny offers Carrie a deal. Jalal forces one of his men to accept a horrific mission.

Brody takes his car to be professionally cleaned and to have a strong smoke smell removed. Max and Virgil follow Brody and take photos of him. Brody then takes a cab to CIA Headquarters, where Carrie waits inside for his arrival. As he walks towards the building from the parking lot, she exits and walks past him. He is very surprised to see her and calls her name. She turns and greets him casually.

Saul catches up with an old friend and discovers evidence of covert activities by Estes. Brody and Vice President Walden find themselves at odds over the future of their political relationship, while Dana and Finn come to terms with their own differences.

In the wake of the explosion, Saul finds Carrie hospitalized and manic, but realizes her chaotic theories have merit; before his congressional campaign begins, Brody takes his family on a weekend trip to Gettysburg, where he retrieves an important item.

Dangerously close to exhaustion, Carrie continues her hunt for Nazir and begins to suspect there is a mole in the CIA. Roya reveals her true colours under interrogation and Saul finds himself fighting to save his career under unexpected circumstances. Meanwhile, the Brodys struggle to maintain anything close to a state of sanity.

Lockhart comes to negotiate. Haqqani uses Saul as his shield. Carrie's investigation gets complicated, especially when someone tampers with her pills.

Quinn forces Carrie to take a necessary but painful next step. Numan learns of his partner's plan. Saul and Allison offer a deal difficult to refuse.

Brody makes a necessary phone call. Saul teams up with Virgil and Max to dig up some information on one of their own. Carrie finds herself preparing for the most important meeting of her career.

Saul consults an expert on Russia and a data scientist. Sen. Paley subpoenas Simone, whose testimony has Carrie re-examining her entire investigation.