One thing you can’t accuse this series of, this season, is doing the expected. It’s managed to keep its three primary characters separated, one way or another, for most of this first half of the season. And no sooner does Damian Lewis’ Brody get returned to the United States than Saul and Carrie (Mandy Patinkin, Claire Danes) pack him off on a very dangerous mission to Iran. How dangerous? Most of this episode has him ensnared in the mission’s first phase: crossing the Iranian border.