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.

Having played many roles of scientific intellect I do have an empathy for that world. It's been hard on me because flying the Enterprise for seven years in Star Trek and sitting in Cerebro in X-men has led people to believe that I know what I'm talking about. But I'm still trying to work out how to operate the air conditioning unit on my car.

I heard police or ambulancemen, standing in our house, say, 'She must have provoked him,' or, 'Mrs Stewart, it takes two to make a fight.' They had no idea. The truth is my mother did nothing to deserve the violence she endured. She did not provoke my father, and even if she had, violence is an unacceptable way of dealing with conflict. Violence is a choice a man makes and he alone is responsible for it.

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.

I've met actors where you think, if only you could just clean up your act and get it together, people would want to work with you. Some people are so difficult, it's just not worth working with them.

If someone says 'Give me one word of advice,' I say 'be fearless.' And knowing without any shadow of a doubt that what they have to give - who they are - is totally unique and not shared by anybody else. And to believe in that uniqueness. It took me decades before I developed courage as an actor.

Comedy today is not what it was years ago. It's always changing, in particular to female comics. No longer are certain subjects considered to be a male preserve. Women can talk about sexuality and their bodily functions and it can be very, very entertaining. It's changed the impact of comedy acting.