My friend Kim said that in the promo for next week, there’s a mark on Dean’s other arm that they were using for some spell? So I guess Michael left his mark on him?? 

Dean: He just left. 
Sam: Why? 
Dean: I don’t know.
Sam: *raises one eyebrow one quarter of a millimeter* 
Dean: I DON’T KNOW

I love one (1) set of brothers and their nonverbal communication.

Sammy. It’s me.

Dean’s first words after taking control back from Michael (via nothingidputbeforeyou)

I don’t think it’s a trick btw. I think Michael is somehow dormant in Dean for now and eventually they’ll have to get him out for good. Just my guess- not a spoiler. 

Also? Note he immediately shucked that stupid hat and didn’t acknowledge anyone else in the room. Looks like Dean behavior to me.