I made a promise to myself that I would try to introduce something unexpected in every single episode of the series. It was largely to amuse myself as much as anything. I didn't ever want the audience to feel that they knew everything.

I was just excited by the whole prospect of working in a television series in Hollywood. I had never anticipated that as an actor I would ever end up here. It may be some sort of fantasy I'd thought about from time to time, but it was completely unrealistic.

It still frightens me a little bit to think that so much of my life was totally devoted to Star Trek and almost nothing else.

I think I came back from America a funnier and nicer person than I went.

I know it feels like two steps forward and one step back, but we are making progress. In my lifetime, I have lived through one World War, I have lived through the end of Apartheid in South Africa, the pulling down of the Berlin Wall. I have experienced what I never thought I would have experienced, which is a pretty workable peace in Northern Ireland, and I experienced a unified Europe - until the Conservative government got its hands on the idea that in order to appease a few back-benchers they would hold a referendum, what a disastrous idea.

One day, out of irritation, I said, you know all of those years with the Royal Shakespeare Company, all those years of playing kings and princes and speaking black verse, and bestriding the landscape of England was nothing but a preparation for sitting in the captain's chair of the Enterprise.

As time went on, I did campaign to lighten the character a little bit, to introduce some romance into the episodes, outside activities, horse riding and fencing and mountaineering.