Doctor: I should have stopped you.

Harriet Jones: What does that make you, Doctor? Another alien threat?

Doctor: Don't challenge me, Harriet Jones, 'cause I'm a completely new man. I could bring down your government with a single word.

Harriet Jones: You're the most remarkable man I've ever met, but I don't think you're quite capable of that.

Doctor: No. You're right. Not a single word. Just six.

Harriet Jones: I don't think so.

Doctor: Six words.

Harriet Jones: Stop it.

Doctor: Six. (to Alex): Don't you think she looks tired?