A slow episode but again Damian Lewis was just great.
Brody obviously knows about his wife and Mike going by the conversation in the car, he was trying to get Mike to own to up it but he got out of giving him a confession.
Shooting the deer shows that he emotionally distant from his family. His wife was upset as he fired the weapon when they had a full house a guests and scared their soon. If Brody has been turned into an assassin then using a gun in public will the likely method. I do wonder if he killed it because his son would have been close to Mike while he captured.
The end was a bit boring and maybe Carrie was just putting on act to try and get information as there was some mind games going on.
To answer the question above then if you missed it there is 4 OD to catch up