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.

He [Merlin] is slightly from another world and place, so it [challenge in bringing the role to life] is about having fun and presenting it in a new way. He's more of a politician, and slightly Machiavellian, but there's also a lovely relationship going on between Merlin and Arthur. There's so much to be had, really.

So getting that balance between what is honoring scripture and the Word and also acknowledging the fact that by the virtue of putting it on film there's going to be a variation and adaptation, I mean, it's a fine dance and a balance. Our producers and directors have worked so hard to get that right and I'm really proud. I think it's a pretty good job.

I think religion might throw up a kind of resistance, but I think if one talks about conditioning we can all kind of understand that.

I like the fact that we're stripping the icons away. They're the WikiLeaks for the age that we're revealing, with the transparency of the characters. We're unearthing the truth beyond or underneath the myth. I love that aspect.

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.

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.