Dr who forth doctor quotes Revenge of the Cybermen

The Doctor: The man is sick, he needs treatment!

Lester: There is no treatment. All we can try to do is stop the infection spreading!

The Doctor: Sorry, gentlemen, I can't allow it.

Commander Stevenson: You can't allow it?

The Doctor: My colleague is a doctor of medicine and I'm a doctor of many things. If we could examine him-

Kellman: Commander, I'm afraid we have to kill these people, too. They brought the plague in here.

The Doctor: Who's the homicidal maniac?

The Doctor: You've no home planet, no influence, nothing! You're just a pathetic bunch of tin soldiers skulking about the galaxy in an ancient spaceship!

Lester: Why don't we just wait here?

The Doctor: I think my idea is better.

Lester: What is your idea?

The Doctor: I don't know yet. That's the trouble with ideas - they only come a bit at a time.

The Doctor: Oh please, don't call me human. Just "Doctor" would do very nicely, thank you.