Critics and audiences didn't seem too happy with Back to the Future, Part II, the inventive, perhaps too clever sequel. Director Zemeckis and cast bent over backwards to add layers of time-travel complication, and while it surely exercises the brain it isn't necessarily funny in the same way that its predecessor was. It's well worth a visit, though, just to appreciate the imagination that went into it, particularly in a finale that has Marty watching his own actions from the first film. --Tom Keogh