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.

I loved playing Walternate because he was completely the same character, version 1985, and then it developed in such a different way, physically and mentally. So, to be able to play that, in the same television series, as playing the other ones was a fantastic gift for me.

I'd never done anything that required a five-year commitment. To build a show that seems to have kept the imagination of the world so much was a bit otherworldly.

Walter is incredibly complex. I do a lot of thinking about the work I do, and try to get the rhythms of scenes.

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.

As actors, you don't actually need to know the future of the character. You just need to know the backgrounds.

I think the glue that held Fringe together was the relationships.