PERI: Look, Doctor, do you really think you're up to this? I mean, you've only recently regenerated and yet you've undertaken so much work.

(The Doctor takes a bite from her apple and continues.)

PERI: Well, what I really mean to say is, you still seem a little unstable.

DOCTOR: Unstable? Unstable? Unstable! This is me, Peri. At this very moment I am as stable as you will ever see me.

PERI: Oh dear.

DOCTOR: You must forget how I used to be. I'm a Time Lord. A man of science, temperament and passion.

PERI: And a very loud voice.