 Throughout his appearances in the fourth season, he also seems to, at the very least, come close to expressing regret, hesitance, and anger several times, and has once quietly laughed at a joke Dean made in "It's the Great Pumpkin, Sam Winchester".Actor Misha Collins feels, through Dean, "[Castiel is] learning a little bit about humanity and re-learning something about [his] own humanity from that exposure.So...there's a humanizing of Castiel going on."