CLARA: I'm the Doctor.

DOCTOR: Don't you dare.

CLARA [OC]: Doctor Oswald.

CLARA: But you can call me Clara.

RIGSY: I'm Rigsy. So er, what are you a doctor of?

DOCTOR: Of lies.

CLARA [OC]: Well, I'm usually quite vague about that. I think I just picked the title because it makes me sound important.