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, Amazon.com