The SAS is the most elite of the special forces in the world. They are not people who go out and advertise; they keep it inside. They don't want anybody to know about them.

Look at Walter Huston in The Devil and Daniel Webster: It's an incredible performance.

This devil loves mankind because men are going to always make the choice that will send him into ascendancy. He's been winning the game for a long time.

Because when you have millions of people with this kind of need for gratification, and the culture is saying that it's possible for everyone to satisfy all of their needs and desires all of the time, there are obviously going to be clashes - clashes of ego.

It's much easier to work with an unknown.

My creative partner is a writer, and he's got an executive producing credit on this film. We've made three films together and I would never underestimate the impact of a writer.

But a writer's contribution is literary and a film is not literary. When you take that stuff off the page, and cast the people who are going to fit into those roles, that's what being a director is.