By Jeff Jensen
August 17, 2007 at 04:00 AM EDT

In Miss Piggy’s world, The Dark Crystal = Star Wars + The Hobbit. On a distant planet, two magical races created by the titular object are at war: cruel, buzzardy Skeksis and gentle, slothish Mystics. To end the conflict, a Gelfling named Jen undertakes a heroic quest to fix the cracked gem. LEGACY Codirected with Frank Oz, Henson’s wonderfully weird film casts a convincing spell as an all-Muppet affair; like Tim Burton’s unabashedly artificial visions, you accept Crystal on its own idiosyncratic terms. B+