I actually don't like Sal involving Jessica with that video. Now she's going to be even more psycho obsessive and could seriously damage the CIA's work. She is a loose cannon.
Jessica is Brody's wife. Carrie is the CIA Op that is wacko.
Regardless, Brody is moving out and Carrie comes to see him. My intuition tells me that they end up fornicating several more times and she gets Brody to trust her in order to gain more intelligence on Abu-Nazir. Saul will use her as the inside source outside of the CIA (being that he tells Estes no one other than Saul has seen the video). Jessica will end up with Mike and they will somehow run Brody's character full circle and he will end up killing Abu-Nazir to save his own arse in the end.
I don't see how this series goes past this season. It is damn good, but considering the possible outcomes, I just don't see it.