"In all my travelling throughout the universe, I have battled against evil, against power-mad conspirators. I should have stayed here. The oldest civilisation: decadent, degenerate, and rotten to the core. Power-mad conspirators, Daleks, Sontarans, Cybermen — they're still in the nursery compared to us. Ten million years of absolute power. That's what it takes to be really corrupt."

"Planets come and go. Stars perish. Matter disperses, coalesces, forms into other patterns, other worlds. Nothing can be eternal."

"Small though it is, the human brain can be quite effective when working at full efficiency — not unlike myself!"

"What's the use of a good quotation if you can't change it?"

"A little gratitude wouldn't irretrievably damage my ego."

"You were expecting someone else?"

"Oh, marvellous. You're going to kill me. What a finely tuned response to the situation."

"You know how it is; you put things off for a day and next thing you know, it's a hundred years later."

"The illusion is always one of normality."

"For some people, small, beautiful events is what life is all about!"

"Why are Earth people so parochial?"

"It's the end. But the moment has been prepared for."

"What can't be cured must be endured. … Oh don't listen to me. I never do."

"Don't cross your bridges before they're hatched."

"You know K-9, sometimes I think I'm wasted just rushing about the universe saving planets from destruction. With a talent like mine I might have been a great slow bowler."

"I suppose you could say the yoke's on him if you were the sort of person who said that sort of thing which fortunately I'm not."

"I wouldn't make a very good criminal, would I?"

"I'm a very dangerous fellow when I don't know what I'm doing."

"The Key to Time is still in my possession. Rage all you like!"

"Someone once tried to build a machine as efficient as the brain. The only problem was, it would have had to be bigger than London — do you remember London? — and powered by the entire European grid. And that was just a human brain. Mine's much more complex."

"Sometimes my brilliance astonishes even me."

"Where's your joy in life? Where's your optimism? … Whenever you go into a new situation, you must always believe the best until you find out exactly what the situation's all about. Then, believe the worst."

"the Doctor: I'll call you Romana Romana: I don't like Romana the Doctor: It's either Romana or Fred! Romana: Alright, call me Fred. the Doctor: Good. Come on, Romana."

"The localised condition of planetary atmospheric condensation caused a malfunction in the visual orientation circuits. Or to put it another way, we got lost in the fog."

"Were you trying to attract my attention?"

"That's trans-dimensional engineering; a key Time Lord discovery!"

"To the rational mind, nothing is inexplicable; only unexplained."

"I never carry weapons. If people see you mean them no harm, they never hurt you — nine times out of ten..."

"I'm the Doctor. Who are you, and why are you shooting at me?"

"Now drop your weapons, or I'll kill him with this deadly jelly baby!"

"Answers are easy. It's asking the right questions which is hard."

"The very powerful and the very stupid have one thing in common. They don't alter their views to fit the facts. They alter the facts to fit their views. Which can be uncomfortable if you happen to be one of the facts that needs altering."

"All right! I confess, I confess. — I confess to your being a bigger idiot than I thought."

"You humans have got such limited, little minds. I don't know why I like you so much."

"You thought I was dead, didn't you? … You're always making that mistake."

"If you don't stop wallowing in self-pity, I'll bite your nose."

"Do you think I don't know the difference between an internal fault and an external influence! No, no, no, there's something going on here. Some dirty work they won't touch with their lily white hands!"

"The Doctor's not here. He's at large somewhere in the complex!"

"Deactivating a generator loop without the correct key is like repairing a watch with a hammer and chisel. One false move and you'll never know the time again."

"Something's going on contrary to the laws of the universe. I must find out what!"

"I'm a Time Lord...I'm not a human being; I walk in eternity..."