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

The waves of time wash us all clean.

The standard of writing that I'm getting now from 'Big Finish' compares very favourably with some of the stuff I was doing on screen in the '80s.

I hope I'm always convincing when I act!

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

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.

If you turn down work because you are frightened of getting typecast, you'll never do anything good.