What's the over under on Carrie flashing back and realizing the connection to Nasir's kid?
This is actually one aspect of the story that I do not like how it is being played. I understand the need to have a reason for Brody to have turned, but I cannot buy that the CIA (or even just Carrie as an expert on Nazir) does not know that Nazir had a son named Isla and that the same son has not been seen in several years. The build up to, in Brody's mind, justify his actions is there dramatic effect, but I don't buy the ignorance of the CIA on the issue (especially when Carrie has a vacant year at the time of his death in her timeline).
Also, if the death of Isla was the trigger event for turning Brody, I would have liked to know what was the trigger had been for Walker to turn.