In her new role as a CIA station chief, Carrie convinces Saul and Quinn to help her hunt down one of the world's most dangerous terrorists. But when Carrie recruits a young Pakistani as an asset, the lines between right and wrong blur and the operation spins out of control. Facing unclear loyalties at every turn, Carrie must take extreme measures and risk everything to protect her country.

Marine Sgt. Nicholas Brody (Lewis) is now a U.S. congressman, and former CIA agent Carrie Mathison (Danes) has returned to civilian life. But when a new and potentially devastating terrorist threat emerges, Brody and Carrie's lives become intertwined once again and they resume their delicate dance of suspicion, deceit and desire.

As intelligence officers Carrie and Saul search for the truth behind the bombing of CIA headquarters, lines are blurred between friend and foe and no one can be trusted. While hiding a stunning secret of her own, Carrie helps recruit Brody for a dangerous mission that could offer him a chance at redemption. But when the plan unravels and Brody is targeted deep inside Iran, he must put his life in Carrie's hands.