It’s easy to immediately associate Christopher Plummer with Captain von Trapp, but looking at his experience on stage shows he was a good choice for this Shakespearean drama. The film also gains from being a British/Danish collaboration, and it was shot in Elsinore. You likely already know the story of Prince Hamlet, who has lost his father and finds his mother, Gertrude, remarried to the new King Claudius. Now he, a…