For the dozens of actors who have played primary roles in the Star Wars cinematic universe — and hundreds, if not thousands, who appeared in smaller parts — only one actor has been in each and every movie. That would be Anthony Daniels, the man behind the iconic gold-plated, oft-bumbling C-3PO. Over four decades, the British performer, now 74, has played the protocol droid in films, TV series and specials, commercials, and even on record, singing as Threepio. But if you ask Daniels, it almost...