Thirty-plus years may have passed since "Return of the Jedi," but the returning actorsmost notably Harrison Ford (2013's " Ender's Game ") and Carrie Fisher (2009's " Sorority Row ") and Han and Leiaseamlessly pick up where they left off, the intervening decades giving them and their relationship the added benefits of history and wisdom.Meanwhile, the newcomers to the epic sci-fi space saga are so dynamically imagined and share such immediate chemistry it is as if they have been around since the beginning.