You're playing William Shakespeare in Bingo at the Young Vic. Is that portrayal informed by all the Shakespeare leads you've played?
I have spent so many years - decades - with Shakespeare's words, his poetry, his characters, the plays, in my mouth, in my body, having them pounding around in my system, and continually reflecting on the themes of those plays and who his characters are. All that has just been a preparation for doing this.

Was there ever a point where you thought you wouldn't return to the stage?
Once I'd understood that Star Trek: the Next Generation was not, as everybody assured me it would be, a failure, and that there was every possibility I might see out my six-year contract, I panicked. I'd heard of actors who'd stayed away from the stage for a number of years who'd lost their nerve and never went back. I was horrified that might happen to me. So, in my second season of Star Trek, I began creating a series of one-man shows to get myself back on stage. The only condition was that there would be no other actors, so that I didn't depend on anyone else, and that the whole production could fit into the trunk of my car.

Were you surprised at Star Trek's success?
I wasn't interested in science fiction, which is a source of irritation to many fans of the show. We'd been working for a year before I agreed to go to a convention. As we arrived I asked: “Is anybody going to be here?" I went out to an audience of nearly 5,000 people. Just for that moment, I knew what it felt like to be Sting.

Did you miss England in your 17 years in LA?
Terribly. I loved my life in Los Angeles for a long time, until the homesickness for the kind of work I wanted to do, for the landscape, for friends and family, just became too severe.

Are there any roles you'd still like to play?
In the classical repertoire, some roles have passed me by now - I never played Hamlet, I never played Romeo. But I was never a Hamlet or a Romeo; I was never a juvenile. Almost more than anything, I'd like to do some new work - a play that hasn't been seen before.

Are you still a Labour supporter?
My upbringing, my childhood, my parents' lives, the work that they did, the conditions they worked in, how we lived - all of these things conditioned me to a way of seeing the world. It was, and continues to be, a view of equality of individuals, fairness in our national life. I have always passionately believed that these are aspects of a just society that can only be achieved under the Labour Party.

Would you like to see Labour taking more left-wing positions?
To say "left-wing" would be a simplification of what is needed. I would like to see the party be more aggressive in its policies with regard to the recession and getting the economy stabilised.

What do you think of the coalition?
I have nothing but contempt for the expression "we're all in this together". That's bullshit - we're not all in this together. The members of the cabinet are not in the same position as the people who live near me in Bermondsey. What we have seen is not so much a response to a global crisis but Tory policies as usual, masquerading under the claim of necessity. I find the very fact of the coalition to be a cynical piece of manipulation.

Can theatre have a political impact?
It must have. It is the duty of the arts, wherever it is possible and appropriate, to address political issues.

You are a patron of the charity Refuge. What made you decide to talk about your experience of domestic violence?
I saw this as an opportunity to be of help to women like my mother who often do not see where help might come from and who have no resources. None were available to my mother. On the contrary, I heard a policeman say: "It takes two to make an argument, Mrs Stewart - you must have done something to annoy him." Those things are still said today.

Is there anything you'd rather forget?
Recently in Hollywood I introduced two famous people to one another. They were in fact husband and wife. It shall take a long time to live that one down. They were very nice to me, but I squirm at the thought.

Do you vote?
I do. I didn't take citizenship in 17 years in the United States and therefore could not vote. But it didn't stop me from quietly campaigning.

Are we all doomed?
On the contrary, I see the world becoming, very slowly, not fast enough, a better place. And unless we are hit by the freak asteroid, or global warming wipes us out, I can only see civilisation and society doing better and better. In that sense, working on Star Trek: the Next Generation was a perfect job because Gene Roddenberry [who created the series] thought there was a better world.

Defining Moments

1940 Born in Mirfield, West Yorkshire
1966 Joins Royal Shakespeare Company
1987 Takes on the role of Captain Jean-Luc Picard in Star Trek: the Next Generation
2000-2006 Plays Professor Charles Xavier in X-Men film series
2007 Title role in Macbeth at Chichester and Gielgud Theatres
2009 Stars as Vladimir in Waiting for Godot opposite Sir Ian McKellen
2010 Knighted for services to drama

Sir Patrick Stewart will play William Shakespeare in Bingo at the Young Vic from 16 February 2012. For tickets: www.youngvic.org