Carrie turns the tables on the mastermind of the Langley bombing and recruits one of Iran's most powerful operatives. Meanwhile, Saul struggles to keep an intrusive Sen. Lockhart at bay; and Dana makes a radical decision that changes her family forever.

Carrie and Quinn pursue a key suspect in the Langley bombing; Saul faces political backlash; Fara discovers the high toll that an intelligence job can take; the Brody family receive startling news.