Oblivious as he is to all the thoughts swirling in Castiel's head, Dean just snorts.

"No kidding. If you've got any ideas on whacking those things, I'll hear it. So far, slowing 'em down is the best we've got. You've been at them for a couple months, right? Found anything better?"

It's easier talking about a case than about people. Dean actually almost relaxes.