Nancy: How’d you follow me here?
Doctor: I’m good at following, me. I’ve got the nose for it.
Nancy: People can’t usually follow me if I don’t want them to.
Doctor: My nose has special powers.
Nancy: Yeah? Is that why it’s so…
Nancy: Nothing. Your ears have special powers, too?
Doctor: What are you trying to say?
Nancy: Good night, mister.
From Doctor Who – Season 1 Episode 9: ‘The Empty Child’ (1×09)