Doc Holliday: You kill a guy out of sheer professional ethics, and then you've got three of his brothers chasin' after you to leave at once. That makes me real angry! - THE GUNFIGHTERS
Clive Finch: The Doctor is a legend woven throughout history. When disaster comes he's there. He brings a storm in his wake and he has only one constant companion ... Death. - ROSE
Doctor: There are some corners of the universe which have bred the most terrible things. Things that act against everything we believe in. They must be fought. - THE MOONBASE.
Doctor: Well, in view of the facts that I’ve already presented - the ray gun, this pen and one or two other things - I think we’re dealing with people who are not from this planet. - THE FACELESS ONES.
Doctor: Well I wish I could give you a precise answer. Perhaps the best way to describe it is a sort of formless, shapeless thing, floating about in space like a cloud of mist only with a mind and will. - THE WEB OF FEAR.
Doctor: If you don't mind my saying so, Mister Van Lutyens, I think this is a very bad idea of yours. You don't know what you're up against. - FURY FROM THE DEEP.