Marty McFly (Michael J. Fox) is a decent teenager who plays an electric guitar, sails about on a skateboard, and courts pretty Claudia Wells. But all is not well in Fox's little world. His father (Crispin Glover) is a milquetoast, his mother (Lea Thompson) is an alcoholic, and his brother and sister (Marc McClure and Wendie Jo Sperber) are decidedly weird. Marty's friend, the positively manic Christopher Lloyd, has been working on a device for time travel. Marty activates the device and finds that he has traveled back to 1955, where he encounters his own parents as teenagers. If that isn't troublesome enough, he also discovers that he doesn't have enough special plutonium fuel to return to the future. All this makes for a snappy, happy, and wonderfully nostalgic outing, with ample time-traveling twists and turns. The laughs are plentiful and the acting by Fox, Thompson, and Glover is superb. Robert Zemeckis's direction, like the technical contributions, is first-rate, and after an ambling start takes off into frenetic, non-stop fun.