Rabid readers of the Harry Potter books know this is the most epic, action-packed book of the series. That gives filmmakers plenty (too much, really) to concentrate on here. The legendary Triwizard tournament (sort of a magical version of the Olympics) has come to Hogwarts and our boy Harry is, of course, a front-runner to win. In addition to battling fire-breathing dragons, Harry must contend with the return of vicious Lord Voldemort (embodied, finally, by Ralph Fiennes) and (even more horrifying) the onset of puberty. 157 minutes PG-13.