Barb

“The Doctor: [aiming gun at the ceiling] Didn't anyone ever tell you? There's one thing you never put in a trap if you're smart. If you value your continued existence, if you have any plans about seeing tomorrow, there's one thing you never, ever put in a trap.
Angel Bob: And what would that be, sir?
The Doctor: Me. [fires]”
― Steven Moffat

“[The Doctor, Capt. Jack and Rose are cornered by the empty children.]
The Doctor: Go to your room! Go to your room! I mean it. I'm very, very angry with you. I'm very, very cross! GO! TO! YOUR! ROOM! [The children lurch away and obey him.] I'm really glad that worked. Those would have been terrible last words.”
― Steven Moffat

“Come on, Rory! It isn't rocket science, it's just quantum physics!
-The Doctor (Matt Smith)”
― Steven Moffat

“If you are an alien, how come you sound like you're from the north?'

'Lots of planets have a north!”
― Russell T Davies