Ooh! See: another hint of the father-daughter thing.

Which brings me back to the way that Twelve seems to be (so far) the most successful amalgam of the Classic Who Doctors. I've seen hints of most of them, especially Three and Four, but some Two and Five as well (not as familiar with Six and Seven, and only have the movie to go by for Eight), but his attitude in this seems very much First. Cranky, grumpy and possessive...