Take a look at some of his other work.
I just watched Secret Smile - absolutely amazing psycho! More power to him for getting on with his obsession/career. He's incredible on film. I wish I could see him on stage. That should be riveting. I'm on the USA side of the pond, so that's unlikely, unfortunately.
Doctor Who gave him huge exposure, indulged a favorite wish, and got him a legion of devoted fans. Lets follow his career, and enjoy his art.