Critics and audiences didn't seem too happy with this inventive, perhaps too clever sequel to the popular 1985 comedy about a high school kid (Michael J. Fox) who travels into the past and has to bring his parents together (or lose his own existence). Director Robert Zemeckis and cast bent over backwards to add layers of time-travel complication to this follow-up, 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 Fox's character watching his own actions from the first film. --Tom Keogh