Nicholas Brody (Damien Lewis) is a U.S. Marine sergeant hailed as a hero when he returns home after being held prisoner by Al-Qaeda for eight years. Carrie Mathison (Claire Danes) is a CIA agent who's been made aware that a former American POW has been turned against his country. Suspecting that Brody is the sleeper agent, Mathison will risk her career to find the truth and prevent a devastating terrorist attack. Morena Baccarin, David Harewood co-star in this taut drama series.