The idea is that Jodie Foster is with her child and she's going back to New York from Germany with her husband's body. She loses her child on a plane, and you think, 'How can that happen?' There's no record of her having brought a child onto the plane, and the captain is left wondering about whether she's telling the truth. You never really know if she's telling the truth or not.

To be honest, you have to do a big Hollywood film to get enough money to do a good independent film!

Lord of the Rings was something I always wanted to do. I read the book when I was about 25, and I was always hoping if it was ever made into a feature film that I would be involved in some way. And then I finally got it, and I was over the moon. It was fantastic news.

I'd been trying for a while to get parts that weren't just the English bad guy, so it was quite refreshing to be playing someone who was a compassionate, decent guy.

I think everybody's got different methods of working which suit the particular individual. Mine is to sort of play the part, and give 100%, to concentrate and focus on it while I'm actually working, but then leave it behind until the next day.

You've only got to walk into a pub or a café or anything and you'll find people talking about topics they're very unhappy with. You feel as though things are being eroded and people don't know where they belong anymore.

I'm still Sean that me mates went to school with, not Sean the film star. And that's the way I prefer to be.