DOCTOR: A long time ago, there was a student at the Academy. He got in here, disappeared for four days. Showed up in a completely different part of the city. Said the Sliders talked to him, they showed him the secret passage out. And we just need the code.

CLARA: What, and the kid told you the secret?

DOCTOR: Ah, no, he didn't tell anyone anything. He went completely mad, never right in the head again. So they say. Last I heard, he stole the moon and the President's wife.

CLARA: Was she... Was she nice, the President's wife?

DOCTOR: Ah well, the was a lie put about by the Shabogans. It was the President's daughter. I didn't steal the moon, I lost it...

CLARA: I'd know you anywhere.