Rule 1: The Doctor Lies.

I Can Say With Pride Verging On Smugness That I've Got Two Very Successful Shows That Assume Their Audience Is Very Smart.

If Anyone Said To Me 'invent A New Monster So We Can Sell More Toys', I'd Kick Them Out Of My Office.

You Want Weapons? We're In A Library! Books! The Best Weapons In The World!

The Doctor: This Is Bad, I Don't Like This. [kicks Console And Yells In Pain] Never Use Force, You Just Embarrass Yourself. Unless You're Cross, In Which Case... Always Use Force! Amy: Shall I Run And Get The Manual? The Doctor: I Threw It In A Supernova. Amy: You Threw The Manual In A Supernova? Why? The Doctor: Because I Disagreed With It! Now Stop Talking To Me When I'm Cross!

Brainy's The New Sexy.