I did worry about being in a science-fiction show. The bits that I was reading, I felt were funny, and I felt the man was childish, so I really did ask initially, "Is this for kids?" And the thing that came back immediately was like, "Hey, take a look at this whole thing again. This is definitely not for children. How can you think that?"

I think it was in my second week that I auditioned for Battlestar. I was very "Oh gosh, I want to be in television, I want to be in something, but I don't know if I want to be in this."

My first show, in England, was called Soldier, Soldier.

Film and television as a medium has only very recently begun to be taught at the great drama schools in the UK. When I was at drama school in the UK, I was there for two and a half years, and we did one week of television and film. It's right before you leave. It's like, "We've taught you Anton Chekhov and William Shakespeare, you are likely to be in a washing-up soap-liquid commercial."

I think the level of devotion some sci-fi fans display turns other people off.

I've been acting for years and years, at prep school - school plays, that kind of thing. That was always very high on my agenda. I went to study English for two reasons. Principally because when I was in university, studying drama wasn't considered an option. You couldn't get a degree course for it. And so many plays and things that I was interested in landed themselves in a broader spectrum of literature.

Anybody who has political ambition has an Achilles heel.