I never have reservations about doing anything as long as I'm being paid.
It was lovely to do The Knock because I haven't done anything really significant since Doctor Who.
If you turn down work because you are frightened of getting typecast, you'll never do anything good.
I do adore food. If I have any vice it's eating. If I was told I could only eat one food for the rest of my life, I could put up with sausage and mash forever.
I was well aware of the fact that once you appeared in Doctor Who as something else, you were ruled out for the part of the Doctor: that was a kind of well known thing in the business.
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 could, I think, quite easily have gone to Oxford. I got four good A levels, but my father's income was such that I wouldn't have got a grant, and he wouldn't let me go to university, and that was the end of it.