Harmless nonsense from Lucas Reiner, the son of Carl and the younger brother of Rob (both of whom put in brief appearances). Three time travelers from the year 2176 (David Cassidy, Olivia d’Abo, and Geoff Hoyle) en route to 1776 accidentally find themselves in the year 1976, where they discover that they have only 12 hours to locate the documents, tools, and artifacts needed to save the nation’s future (in 2176 all history and memory have been wiped out by a magnetic war, and they need a copy of the U.S. Constitution to make a fresh start). A lot of this comes across like Earth Girls Are Easy without Julien Temple’s sense of style, but the mood is amiable enough, as long as one can put up with some hyperbolic mugging. Reiner directed this comedy from a script that he wrote with executive producer Roman Coppola; Leif Garrett, Jeff and Steve McDonald, and Liam O’Brien costar, and among the other celebrities who appear in cameos are Julie Brown, Tommy Chong, Devo, and Moon Zappa. (JR)