A Doctor of...

Jamie: Oh don't worry the Doctor will fix you up just fine!

Astrid: Oh you're a doctor?

The Doctor: Well not of any medical significance.

Astrid: Doctor of Law? Philosophy?

The Doctor: Which Law? Whose Philosophy?

Astrid: Oh I see, you're determined to be mysterious. Um, Doctor of Science? Doctor of Divinity then?

The Doctor: You'll run out of doctors in a minute!

The Enemy of the World, Pt. 1

*being shot at*

Victoria: Perhaps we've landed in the world of mad men!

The Doctor: They're humans beings, if that's what you mean. Indulging in their favourite pastime: trying to destroy each other.