I remember seeing Charlton Heston on stage during his peak performance in "Man For All Seasons," and he was quite good then. Here, though, which was filmed much earlier, you can see him still developing as an actor. He plays Mark Antony, and the rest of what is described as a well-regarded cast generally follow Shakespeare's account of Caesar’s ascent and decline. Sir John Gielgud takes on that role, and he’s the onl…