After touring Hamlet in 1980, the actor succumbed to the 'worm of doubt' " but a job playing Shakespeare's quick-witted hero forced him to face his anxietyI'd been on a world tour of Hamlet, which finished in 1980, and I'd managed to give myself stage fright en route. I was tired, wasn't enjoying it any longer; there was a worm of doubt in my head. I just couldn't do it. I didn't go on stage for two years.Then I was …