If anyone said to me 'invent a new monster so we can sell more toys', I'd kick them out of my office.

Rose: Look at you, beaming away like you're Father Christmas! The Doctor: Who says I'm not, red-bicycle-when-you-were-twelve? Rose: [shocked] What? The Doctor: And everybody lives, Rose! Everybody lives! I need more days like this! Go on, ask me anything; I'm on fire!

Rose: 'If you are an alien, how come you sound like you're from the north?' Doctor: 'Lots of planets have a north!

The Doctor: It's my nose; it has special powers. Nancy: Yeah? That why it's so...? The Doctor: What? Nancy: Nothing. The Doctor: What? Nancy: Nothing. Do your ears have special powers too?

Amy: I never knew you drank wine. Doctor: I'm 1103 I must have drunk it sometime in my life. *takes sip and spits it out in disgust*

My problem is that the audience is more fiction-literate than ever. In Shakespeare's day, you probably expected to see a play once or twice in your life; today you experience four or five different kinds of fiction every day. So staying ahead of the audience is impossible.

What is immutable about Sherlock Holmes? He favors reason over emotion, but actually underneath that, there is a lot of emotion going on. You can't suddenly make him ordinary because he would hate that. He's not suddenly going to be somebody else.