Like the character I played in 'Jekyll', we all have different masks we put on for different occasions. As much as we all want to lead decent lives, we're also attracted by the idea that something dark may lurk within us.
We have to get behind the scientists and push for a dementia breakthrough. It could be that we fear dementia out of a sense of hopelessness, but there is hope, and it rests in the hands of our scientists.
Brain surgery is a fairly aggressive process. There's a lot to get through. There's the beautiful, delicate shaving first, which is really lovely. There's a wonderful ceremony of putting all the covers on, so only the little bit you're operating on is revealed. But once they make the incision and tear the skin back, the drill comes out.
I have three older sisters who, when we were children, used to hold me down on a bad day and put make-up all over me, so I've had an aversion to it all my life and hate sitting down in the make-up chair.
Funnily enough, Northern Ireland is a great example of where politics can win over conflict. The decision to down arms and follow a political path would have been unthinkable once. It shows just what is possible.
When I did the film 'Hear My Voice' a few years ago, I disappeared fully up my own backside for a while. Because I thought my career was taking off, I became a bit of an egomaniac and a pain in the neck. I thought I was God's gift to mankind and the greatest Irishman since George Best.
When I was growing up, Belfast City Hall was surrounded by security, and we had no access to it. But now, people come in and out of it all the time. On a nice day, office workers and students sit on the lawn outside and have lunch. It's great to see how Northern Ireland has changed. To be part of that is fantastic.
You don't learn charm. It's not something that you can acquire. I have used it much in my life with great success, but it's not necessarily what makes me an actor. It became a very easy label to attach to me. It also feels a bit dismissive. People go, 'You're so lovely and charming', but it's a wee bit, 'That's all you are.'
Ours was a very progressive Protestant family, but my parents were God-loving rather than God-fearing. We went to church, and I still go with my mum and dad when I return home - it's a family thing. I played flute in my dad's marching band, but I had an integrated upbringing. We had a lot of Catholic friends.
If I get to the end of my life, and people say, 'He was in 'Cold Feet,' well, I was, and it was great. I thought the fourth series wasn't great. I thought there were weak episodes throughout. Overall, I thought it was a good show, it had an impact, it dealt with a lot of issues, and it was a great part.