"One day, I shall come back. Yes, I shall come back. Until then, there must be no regrets, no tears, no anxieties. Just go forward in all your beliefs and prove to me that I am not mistaken in mine."

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

"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."

"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."

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

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

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

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

"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!"

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

"Who's the homicidal maniac?"

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

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

"So you're my replacements. Humph. A dandy and a clown."

"Earl Sigma: You're a nice guy Doctor, but a little weird."

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

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

"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."

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

"You may be a doctor. But I'm the Doctor. The definite article, you might say."

"There's no point being grown-up if you can't be childish sometimes."

"Shut up, K-9!"

"Never cared much for the word "impregnable." Sounds a bit too much like "unsinkable.""

"Have a Jelly Baby."

"Homo sapiens. What an inventive, invincible species. It's only a few million years since they crawled up out of the mud and learned to walk. Puny, defenceless bipeds. They've survived flood, famine and plague. They've survived cosmic wars and holocausts. And now, here they are, out among the stars, waiting to begin a new life. Ready to outsit eternity. They're indomitable."

"Back of the ship....Because the front crashes first. Think it through."

"I love humans. Always seeing patterns in things that aren't there."

"I am not like you."

"Who am I? WHO — AM — I?"

"Grace, I came back to life before your eyes. I held back death. Look, I can't make your dream come true forever, but I can make it come true today."

"Excuse me, can you help me? I'm a spy."

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

"Anybody remotely interesting is mad in some way."

"All is change, all is movement."

"Among all the varied wonders of the universe, there's nothing so firmly clamped shut as the military mind."

"There are worlds out there where the sky is burning, and the sea's asleep, and the rivers dream; people made of smoke and cities made of song. Somewhere there's danger, somewhere there's injustice, somewhere else the tea's getting cold. Come on, Ace. We've got work to do."

"Listen! It's the muffin man! Come on. I'll buy you all muffins."

"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."

"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."

"Were you trying to attract my attention?"

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

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

"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."