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.

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.

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.

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.