[David Tennant's] Doctor has such humanity, he seems to understand us and he's very warm, so he's a comforting Doctor to be with, and he enables us to be slightly scarier than we had been.

Doctor Who: You want weapons? We're in a library. Books are the best weapon in the world. This room's the greatest arsenal we could have. Arm yourself! (from Tooth and Claw in Season 2)

Anything works, as long as you write it properly.

Drama's not safe and it's not pretty and it's not kind. People expect the basic template of television drama where there might be naughty villains, but everyone ends up having a nice cup of tea. You've got to do big moral choices and show the terrible things people do in terrible situations. Drama is failing if it doesn't do that.

I love having debates with people when they are debates but some people, you just can't. Some people shouldn't be given the oxygen.

Buffy the Vampire Slayer showed the whole world, and an entire sprawling industry, that writing monsters and demons and end-of-the-world is not hack-work, it can challenge the best. Joss Whedon raised the bar for every writer - not just genre or niche writers, but every single one of us.

Maybe that's when bad scripts are written, when you choose the theme first. I consider that I've something to say when I've thought of a person, a moment, a single beat of the heart, that I think is true and interesting, and therefore should be seen.