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'Doctor Who' is one of those things that stays with you throughout your career, and I'm very happy with that.

I ran into an extraordinary doctor. He got up inside my head and figured out how my brain processed things, what my core values were, what my inner dialogue was.

I really admire medical people. They have a great sense of humour, and they just have to get on with it.

What people don't realize is that professionals are sensational because of the fundamentals.

I'm training to become a giggle doctor. It's a kind of hospital clown who changes the atmosphere on the ward and helps recovery. It's about making patients laugh but also much more.

I've never made a penny being a doctor, so that makes it not a job. My sense of a doctor is that one is a presence caring for health. So I'm never not a doctor. People call me from all over the world who are hurting, and I care for them. Chatting is what more people want than anything.

Every man gets a narrower and narrower field of knowledge in which he must be an expert in order to compete with other people. The specialist knows more and more about less and less and finally knows everything about nothing.

I often look at a lot of Doctor Who stuff that's about now, which no one has approached me about.