I left drama school and went straight into a 10-week film for which I was paid £75 I might say, which for 1962 was one heck of a lot of money.

Films don't take as long as people think. 'Harry Potter,' people always used to say, 'Well, my God, do you ever get any time to yourself?' I think I did, in 'Harry Potter,' over a 12 year period I did five days. So it's not exactly exhausting.

In anything really, it's finding the reality. You can't be 'real,' but you can create a reality. And that created reality is what the audience believes in. And that's essential. Because if the audience doesn't believe that, they're never going to trust you. And if they don't trust you, you can't lead them up the mountain.

I certainly don't see myself as Caligula.

By the very nature of being a clergyman's son, people tend to put you slightly apart, which is - you tend to live a life, at some stages, as being - people being suspicious of you and puts you rather on a - I don't mean lonely, particularly. But it does tend to put you apart.

Snowpiercer has both [optimistic and pessimistic]. It was essentially optimistic. The most pessimistic was my part, because of his knowledge. He knows how it started. The status quo, he knows, has to be maintained, otherwise there is no chance. He knows that this revolution is completely understandable and is also commendable. He also knows the negatives. In the end, that's not a very positive position to be in.

Something like 'Alien,' that was not so easy. If there's any genre I wouldn't mind not having to do anymore, it would be science fiction. It's just all to do with the toys, and there's so much hanging around.