Doctor: I've stopped the Universe. Still, they'll never notice. Just imagine, somewhere someone's just slipped on a banana skin and he'll be wondering forever when he's going to hit the ground. - THE ARMAGEDDON FACTOR.
Doctor: Why can't people be nice to one another, just for a change? I mean, I'm an alien and you don't want to drag me into a swamp, do you... You do?! - FULL CIRCLE.
Doctor: Unless we work very closely together, we could be here until the crack of doom. Oh, what's the use? Can I have one of your pickles? I had a rushed lunch. - WARRIORS’ GATE.
Doctor: You know, I come here from time to time myself and nothing on Earth changes quite so often as the fashion! You wouldn't believe the way some people look! - FOUR TO DOOMSDAY.