I read as much as I could, but really just spoke to Chris Chibnall and asked all the pertinent questions. That made me feel like we weren't going to do an off-the-peg Camelot, which has been touched upon in many films and TV series before. I really just picked his brain and, in doing so, I got fired up by tackling Merlin in a fresher angle.

I love new writing, new blood, modern works by unknown writers.

A large part of how an actor works and their process is the stimulation of what's around you, and none more so than in a period piece. This is a modern piece, as much as it is set in a different time, age and myth. If it wasn't relevant, it wouldn't have been made and we wouldn't be putting our energy into it. It's relevant for us today because, in some ways, it throws up a mirror to all of us. As an actor, you get stimulus and you're effected by that, whether it's costumes or funny beards or castles.

I wanted to say, "Hey, Pope Francis," but I cried like a baby. I was reduced to a very humble set of feelings, because it was not about what was said: There's a presence. That was a blessing for myself and my family and everyone there to be a part of that.

Youth is a predominant factor. We are seeing a young King Arthur, and thereby a young-ish - as I'm into my 40s - Merlin. It was about how to tackle it, from that point view.

he challenge is finding the modern conduit for the audience, having fun and really looking at the duality of this particular character, that is both devil and angel, and on the cusp of losing control of the pagan background, to this newfangled religion called Christianity. There's a great backdrop there, and just a whole dark side with the magic.

It all felt like a terribly long time. It would have meant that I had to make five movies in five years and if you don't like the movies, too bad. I guess I just wanted my freedom, and I think my life has been incredibly enhanced as a result.