"Ooooh, I'd like a Santa hat," the Doctor said, tossing the last bit of his drink into a rubbish bin and taking her hand again. "Something with a little sprig of holly in it. Very festive."

He glanced down at the detector, checking the alien signal again. "Right! So! We've got a Christmas invasion to deal with, well, again, so! Let's see. Looks like it's coming from the eastern part of the city."