Getting the part. Well, actually no, because I never really did get the part, I originally joined it as a different character, if you remember. You're probably one of these Who buffs who knows far more about it than I ever did at the time.

The interviewer is patted on the head by the cameraman at this stage.

So I never really got the part, I played Princess whatever her name was, Astra, per ardua ad astra ["through struggle to the stars" - the motto of the Canadian air force]. I wanted her to be called Ardua, never mind. Mary wasn't sure whether she was going to do it or not, and I sort of drifted into it I think because Tom got on well with me and it was easy. So in a way, there weren't really early memories, it just happened.

As for watching it, I never really did as a child because we didn't watch all that much television so I pretended I did at the interview. I said, 'Oh yes, I hid behind the sofa like everybody else,' you know.

Don't ask me who my favourite monster was because I'm sick of saying Tom Baker.