Dean blinks, and he's far from understanding the whole "Earth has ended" thing. He's about to ask about more, but the other two show up, and he's distracted.

Kaylee may be a sociable person, but Dean really is not. His expression twitches when he sees the blonde guy and the new chick, but he doesn't say anything, just shoves his hands in his pockets of the jumpsuit. His eyes are on Jo, though, as she goes for the guns. That, Dean likes.

"Hey." Dean says shortly, slightly irritated that Sawyer's here. This means he can't flirt as effectively. "And you two are?"

His hand slips from his pocket to rest on his gun; he can't help it, it makes him feel more comfortable.