I was brought up in a very poor and very violent household. I spent much of my childhood being afraid.

Where can I go that would give me the same level of satisfaction as an actor?

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 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 brought up in a very poor and very violent household. I spent much of my childhood being afraid.

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.

I've often reflected on this in the past weeks as I've been following the presidential campaign: Very often, I thought it would have been great for both of these guys to sit down and be force-fed a couple of dozen episodes of Star Trek.