Gripping suspense escalates to a fever pitch in the brilliantly reinvented fourth season of this thriller. In her new role as a CIA station chief, Carrie (Claire Danes) convinces Saul (Mandy Patinkin) and Guinn 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 are blurred 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.