Is anyone else slightly scared by Cas' new attitude towards Dean, and apparently, all humans?

His new attitude IS pretty scary! It sounds like he intends to do everything by the book now - no more helpful hints, or coming when Dean calls for him, and no more doubts about his mission. Some fans have suggested it may not even be Castiel that came back...that's a real possibility; or, he's been reconditioned, or he may even be faking the new attitude. It doesn't look good, though!

Not so much nervous, but saddened by it. I was so happy that Cas' was finally helping the guys. But he did trade bodies with Jimmy (his "vessel") so he still empathizes with humans to some degree.

I doubt he'll go as far as to betray them or anything. He and Anna are the only characters I trust at the moment. Excluding Dean and Bobby. THATS RIGHT I DON'T TRUST SAM! He is extremely close to becoming something evil and I think Rubys training him to kill Lucifer so that he'll become the new ruler of Hell or the new leader in the battle over Good and Evil. Everything seems to be falling apart for the Winchesters. Something tells me this seasons not gonna have a happy ending for them.....again.

No, not really. Cus he is just doin his job and duty as an angel...so no.

i love the new cas