I wasn't setting out to write a documentary; if I had, I would have done it in a completely different way. I was asked to write a drama that would appeal to a big audience in America that had no knowledge or interest in The Tudors at all.

The key for me with historical characters is they're interesting because they're human beings. A little bit of Hemingway goes a long way here, but journalists and writers should honestly look at their material and have a real interest, a real passion in what they want to write, and they should also have a lot of knowledge as well.

I've found that using historical material and being rooted in historical material is liberating because I always think to myself, 'Well, this actually happened, and this is fantastic!' That's why I don't like fantasy, in a way. Because it's sort of in emptiness.

When you're making a TV drama, the showrunner is God, and so however onerous and difficult and consuming that responsibility is, you're being treated with respect, so it changes your whole outlook to the production. You're being asked about costumes, set design, music, every aspect of the show.