[Ah. The Doctor's lips thin for the briefest moment before the levity to his voice returns.] You'll have just missed it. But I'm sure there's something we can do about that. [He just needs to get his hands on a guitar.]

Just mine. There are plenty of other types of spaceships - there was one that was being propelled along the back of one of the last star whales in existence. Others look like saucers - or whatever it is humans think they are if they haven't seen them before. [He shrugs.] Really just depends on the people and what they've got. And no. Not a cop. Just an idiot with a blue box. Or The Doctor if you like.