In Homeland season 2 episode 5, "Q & A" -- Brody agreed to work with the CIA in exchange for his immunity and his family's security. Now that the odds seem to favor the agency, what lies ahead between Brody and Carrie? Will Carrie's mental status cloud her judgment against Brody's actions?
Brody seems to be keeping his word to help the CIA... for now. He'll give Carrie & Co. some valuable intel about the shop where his suicide vest was made. The real question: Will paranoid Carrie believe Brody, even when he's telling the truth? Then again, by the end of the next episode, she'll have a very good reason to be suspicious.
Source: TV Guide