Melvyn Bragg interviews the novelist Ian McEwan, focusing on his latest novel 'Saturday', which follows the day in the life of a successful neurosurgeon Henry Perowne set against the background of protest against the Iraq War. In addition Bragg also looks at the author's life and previous work. McEwan's style has moved from macabre short stories to novels which test and explore their characters ruling ethos (particularly an interest in science). McEwan makes for a engaging and thoughtful interviewee who can often be fascinating, even for those not familiar with his work.