Put an exacting, classical theatre impresario in a room with an irascible firebrand film star, give them the world's greatest artistic work, and what do you get? Two doses of theatrical dynamite, clearly. The first, in 1964, when Sir John Gielgud directed Richard Burton in the now legendary Hamlet on Broadway, and, more recently, in the story of how that production came about, penned by Jack Thorne and delivered at the hands of someone who can also tell a story or two, Sam Mendes. Much like watching the behind-the-scenes on a favourite film, there's a certain voyeuristic appeal to th...