I can't see what's wrong about assuming intelligence in your audience and what's bad news about being rewarded for assuming that.

Young Reinette: Monsieur, be careful! The Doctor: It's just a nightmare, Reinette, don't worry, everyone has nightmares. Even monsters under the bed have nightmares! Young Reinette: What do monsters have nightmares about? The Doctor: Me!

The difference between a beautifully made failure and a beautifully made hit is who you've got playing the leads.

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

Madge: I don't know why I keep shouting at them. The Doctor: Because every time you see them happy you remember how sad they're going to be. And it breaks your heart. Because what's the point in them being happy now if they're going to be sad later. The answer is, of course, because they are going to be sad later. ~ The Doctor, the Widow, and the Wardrobe

Writing for adults often means just increasing the swearing - but find an alternative to swearing and you've probably got a better line.

Madness is just what a genius looks like to a tiny mind.