I've got plenty of train memories. I was sent to school when I was eight years old in 1948 in Kent. So I had to go through London in 1948, just after the war. Many ,many strange experiences.

The image onscreen takes you forward, it's the driving force of the piece and it's also the information that you're given.

What I like about [Berthold] Brecht, it's very interesting. When Helene Weigel came over and somebody talked about Lotte Lenya and said "well, she wasn't alienating." And Weigel said "No, no, no. Why, Lotte Lenya was so true - who cares?" She said: "Berti only developed the theory of alienation in order to stop bad acting." I heard her say that. Now that's brilliant.

I think you can get better in mathematics on a school level, but when you're talking about being a mathematician, I think that's definitely a gift of genes or whatever.

I certainly don't see myself as Caligula.

We all have our limitations.

A very, very impressive director, Tomas Alfredson. It's only his second film [ 'Tinker Tailor Soldier Spy'], but he's a real find.