Simon Magus is set in 19th-century Silesia. It is an allegory of the diaspora and it is full of fantasy and humour and magic - part folk-tale, part realistic human psychology - very moving and charming. I play the Devil. Although it's only a cameo, the Devil always has the best tunes. I hadn't played Lucifer before - unless you call Richard III the Devil - but some time ago I had been asked to play the Devil in Arthur Miller's play The Creation Of The World And Any Other Business. That didn't come off, so I was really pleased to be asked to play this Devil, who comes in three guises and is charming and uncomplicated, wears mittens and doesn't wash much.