DOCTOR: Oh, you're just another Time Lord with too much time on his hands.

KNOX: I'm not a Time Lord. Gracious, the arrogance of your people, Doctor. You think you own Time. You don't. You think you control Time. You don't! Others are far, far more adept at that, Doctor. The self-righteous, self-importance of it all.

DOCTOR: You're not a Time Lord?

KNOX: I am not.

DOCTOR: But you have a Tardis.

KNOX: You don't have the monopoly, as I'm sure you've gathered over the years and years.

DOCTOR: At least mine was not stolen.

KNOX: Oh, indeed? Nor was mine. I got it, well, second-hand, from a Nekkistan dealer on Gryben. Apparently it was just lying around, he said. It's Mark 70, I think. Very swish.

DOCTOR: Operating a Tardis is not for amateurs.

KNOX: Oh, Tardises, Time Rings, Time Portals, they're all the same to me. You Time Lords, you're archaic, old-fashioned, out of touch, out of time. Time travel can be bought like anything else.