SuperWho. I love they both say it so normally, like just another day at the job.
Add Sherlock saying something along the lines of "You're not a monster, you're an alien. Now shut up we have a case to solve." Them Dean muttering an insult and the doctor secretly smiling. AHHHH DAMNIT I gave myself more feels
I'm still playing "I Can't Believe It's Not Canon!" Are you?