My Favorite Dr. Who Quotes:

Barara: "Perhaps it's frozen."
The Doctor: "No, impossible... not in this temperature. Besides, it's too warm."
-- “The Keys of Marinus”

Paris: "You see, I'm treated with more respect by the enemy than I am by my own family."
Cassandra: "They don't know you as well as we do."
-- "The Myth Makers"

“Logic, my dear Zoe, merely enables one to be wrong with authority.”
-- The Doctor, in "The Wheel in Space"

The Doctor: "You look very nice in that dress, Victoria."
Victoria: "Thank you. You don't think it's a bit, uh --"
The Doctor: "A bit short? Oh, I wouldn't worry about that. Look at Jamie's."
-- "Tomb of the Cybermen"

Thug: "Don't try anything."
Liz Shaw: "It's all right; I won't hurt you."
-- "The Ambassadors of Death"

"I thought you said you took science at A level."
"I didn't say I passed."
The Doctor and Jo Grant, “Terror of the Autons"

“You are incorrigibly meddlesome, Doctor, but we've always felt that your hearts are in the right places.”
-- Unnamed Time Lord, "Terror of the Autons"

"You see, it's been an age-old custom for at least five years that..."
-- Freeth, “The Paradise of Death”

Sarah: "I see."
The Doctor: "Do you?"
Sarah: "No."
-- "Death to the Daleks"

“Why is a mouse when it spins?”
-- The Doctor, "Robot"

"Where are we?"
"Hiding."

Leela: "I don't know what to believe any more."
The Doctor: "Well, that sounds healthy, anyway. Never be certain of anything; it's a sign of weakness."
-- "The Face of Evil"

“You know 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.”
-- The Doctor, "The Face of Evil"

“Please do not throw hands at me.”
D.84, "The Robots of Death"

“Maybe I am getting too young for this sort of thing.”
-- The Doctor, "The Invasion of Time"

Romana: "My name is Romanadvoratrelundar."
The Doctor: "I'm so sorry about that. Is there anything we can do?"
-- "The Ribos Operation"

The Countess: "My dear, I don't think [the Doctor]'s as stupid as he seems."
The Count: "My dear, nobody could be as stupid as he seems."
-- "City of Death"

Romana: "I don't think we should interfere."
The Doctor: "Interfere? Of course we should interfere! Always do what you're best at, that's what I say."
-- "Nightmare of Eden"

Fisk: "Your name and date of birth?"
The Doctor: "I'm called the Doctor; date of birth... difficult to remember, sometime quite soon I think."
-- "Nightmare of Eden"

“One must always accept the unexpected.”
-- The Doctor, "The Leisure Hive"

The Doctor: "Traken Union, famous for its harmony. A whole empire held together by... by people being terribly nice to each other."
Adric: "Well, that makes a change."
-- "The Keeper of Traken"

The Doctor: "Still, what can't be cured must be endured."
Adric: "That's the silliest thing you've said yet."
The Doctor: "Then don't listen to me. I never do.
-- "The Keeper of Traken"

“I wonder, boy, what would you do if you were me, hm? Or perhaps I should ask, what would I do if I were me?”
-- The Doctor, in "Castrovalva"

Monarch: "You grasp the theory of relativity?"
Adric: "Doesn't everyone?"
-- "Four to Doomsday"

“You know how it is; you put things off for a day and before you know it it's a hundred years later.”
-- The Doctor, in "Arc of Infinity"

Tegan: "Will the TARDIS still function? The console blew up!"
The Doctor: "Oh, probably did it the world of good."
-- "Enlightenment"

“What's [The Master] up to now? It'll be something devious and overcomplicated. He'd get dizzy if he tried to walk in a straight line.”
The Rani, "Mark of the Rani"

The Doctor, “Time and the Rani”:
“I'm as fit as a trombone.”
“A bad workman always blames his fools.”
“... like a bull in a barber shop.”
“You don't understand regeneration, Mel; it's a lottery, and I've drawn the short plank.”
“Absence makes the nose grow longer.”
“The proof of the pumpkin is in the squeezing.”
“The more I know me, the less I like me.”

“Ace, give me some of that Nitro-9 you're not carrying!”
-- The Doctor, in "Remembrance of the Daleks"

Dalek: "Small human female sighted on level three."
Ace: "Who're you calling 'small'?"
-- "Remembrance of the Daleks"

Davros: "The Daleks shall become Lords of Time! We shall become all--"
The Doctor: "--powerful! Crush the lesser races! Conquer the galaxy! Unimaginable power! Unlimited rice pudding! Et cetera! Et cetera!"
-- "Remembrance of the Daleks"

The Doctor: "I don't suppose you've completely ignored my instructions and secretly prepared any Nitro-9, have you?"
Ace: "What if I had?"
The Doctor: "And naturally, you wouldn't do anything so insanely dangerous as to carry it around with you, would you?"
Ace: "Of course not. I'm a good girl and do what I'm told."
The Doctor: "Excellent. Blow up that vehicle."
-- "Silver Nemesis"

Lavel: "Sir, we don't know what the situation is here!"
The Brigadier: "The situation, Lavel, is normal, and it doesn't get much worse than that. You know, I'm rather enjoying this."
-- "Battlefield"

“I ought to have given myself more warning.”
-- The Doctor, in "Battlefield"

The Doctor, in “Ghost Light”:
“I'm not interested in money.” <pause> “How much?”
“Oh, don't worry; I always leave things till the last moment.”

“I never make stupid mistakes. Only very, very clever ones.”
-- The Doctor, in “Timewyrm: Genesys”

"You lot. You spend all your time thinking about dying, like you're going to get killed by eggs, or beef, or global warming, or asteroids. But you never take time to imagine the impossible: that maybe you survive."
-- The The Doctor, in "The End of the World"

"When I say run, run... RUN!"
-- The Doctor, many episodes...