I am a big man, but I've allowed my condition to deteriorate by being overweight.

I'm an actor. If you had said to me before I started acting that I'd get two bites of the cherry - you would do things that people will remember forever like 'The Brothers' which I did in the '70s and now 'Doctor Who' - I'd have been overjoyed and I still am.

I've mellowed quite quickly.

It was lovely to do The Knock because I haven't done anything really significant since Doctor Who.

One way of watering down the effects of violence is to approach it in a more lighthearted way. I don't mean to say that you laugh when somebody has their arm sawn off, but you can diffuse fear with humour.

I'm perfectly proud of the work I did, looking back at it. I know I've had a bit of a revision since my 'Big Finish' stories came out.

I never have reservations about doing anything as long as I'm being paid.