Brody prepares to enter the spotlight; Carrie closes in on an al-Qaeda plot.

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.

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.

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.

Dana is shocked by her visit to the hospital. Faber's Tom Walker questions get him tangled up with the CIA. Brody agrees to help stop an attack on America, but his loyalty is questioned when Gettysburg once again becomes a battleground.

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.

With an old adversary in custody, Saul makes the gamble of his career. Carrie and Quinn scramble to contain a local police investigation, while Mira finds her marriage at a crossroads.

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

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

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.

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.

Saul hunts for Simone's link to Russia. Carrie flees with Franny after a blowout with her sister and later has an eye-opening chat with Dante's ex.

Wellington puts pressure on the Russian ambassador. Maggie gives Carrie an ultimatum. Saul and Carrie take extreme steps to get Dante to talk.

Carrie gets an anonymous tip on a possible source of leverage to use against G'ulom. Saul goes to Pakistan to arrange a private meeting with Haqqani.