I never was obsessive about anything I watched when I was a kid, except maybe 'The A-Team' and 'Airwolf'... And I loved 'Knight Rider' and then later 'Baywatch.'

When you're a kid, 'Star Trek' is a slower burn. It's funny, it's entertaining, but it also has a maturity about it - which is its universal appeal, I think.

'Sherlock' fans are, by and large, an intelligent breed, so they've gone through my back catalogue and got what I've done, why and how I've done it. There is some obsessive behaviour, but I worry for them rather than me.

If you have an over-preoccupation with perception and trying to please people's expectations, then you can go mad.

'Frankenstein' was all about the idea that, through electricity and the destruction of night, man creating light and darkness, we took on god-like powers and then abused them like gods, and we are only men. That's a story about man making a man in his own image. The inversion of natural order.

I've always wanted to play a spy, because it is the ultimate acting exercise. You are never what you seem.