"The mayhem and torture wreaked here, by saint or scum, are so vivid and persistent that it's a wonder, and a puzzle, why The Dark Knight snagged a PG-13 rating. (Don't take your 9-year-old son unless you think he'd enjoy seeing a kid just like him tremble in fear while a gun is held to his head by a previously sympathetic character.) But kids would have trouble following the movie, let alone understanding it. For teens and adults, it's a strap-yourselves-in trip, handsome and assured as only a big-budget picture can be. (Part of it was shot in the IMAX process, which lends the action scenes a startling clarity and depth.) And for reassurance, Nolan brings back old friends from Batman Begins: Michael Caine as Bruce's butler Alfred and Morgan Freeman as Fox, who takes care of Bruce's toys"