"And you don't stand out like a sore thumb, Captain?" the Doctor demanded, more irritated at the insult on the TARDIS than the jibe on his expertise. "That TARDIS has seen more space travel, more universes, and more of time than you ever would."

He expected a swelling of pride from her (she did so like it when he bragged about her brilliance), but instead there was nothing. Nothing but a confused silence.

The Doctor spun around and headed towards the blue box. Why was she silent? Why was she confused? What happened?

He put a hand to her wooden exterior. "What's going on?"