While I was a voracious movie-goer as a boy, I never put writing and films together in my mind.

You know that certain things that you use in the film are going to be shown to audiences five hundred times before they ever sit down to watch the movie. So you have to kind of modulate what can I do to give marketing enough material but that I can still withhold certain things so that it's fresh and surprising for the audience coming to see the movie.

I used to be a die-hard defender of physical film, which I still am. I love shooting on physical film and I think it's great.

I've looked at all of Hitler's speeches thinking that there's gotta be one where he's 'I'm Hitler!', but there weren't any. His speeches were all about hope and prosperity - he ran on a platform of peace and prosperity. Hitler speeches that makes him sound like a villain are pretty hard to find, he was very detached from what he was doing, he kept himself compartmentalised from it.

Normally, I tend to be a very binary filmmaker. You give me a problem and a destination and I say, "All right. If you want to get from here to here, there's a series of if/then's that will get you there. And if you have other stuff you want to do along the way, I'll give you all the if/then's that are caused by that."

Evil is a really tough concept for me. The idea of a villain that is bad for bad's sake seems kind of absurd.

When you sit and watch the film with an audience, the focus groups and the cards and all of that is the less what you're worrying about. When you watch a film with an audience you see what is working and what's not working.