I'm truly grateful to the writers of Fringe for giving me that because, over the years, when I've spoken about the character with them, I've always felt that this would be the perfect way to end and complete his journey, and to complete the journey of this series, and they gave it to me.

A lot of the times, roles are chosen for us.

I always loved the challenge. When something new happened, I always used to get quite excited.

I don't know where the line is. I don't know how much of myself is in Walter. There's got to be a bit of him there.

We've had such a close relationship with the fans. Through social networking and the internet, we have much more contact, and we did go to things like Comic-Con. So, I think people know most of our secrets.

I love having played Walter because I suppose any actor brings a certain aspect of their own personality to their work, and I had a fairly broad canvas to paint on with the different versions.

I could go anywhere in the world and people would stop me in the street and talk about Fringe and how much they adored it and asked questions about it.