"You're not serious!" harrumphs Professor Johnston (Billy Connolly) as this ludicrous time-travel adventure staggers into the home stretch, and he could be speaking for every unfortunate in the audience. Based on the novel by Michael Crichton and directed by veteran filmmaker Richard Donner, this $80 million disaster features good actors giving terrible performances and bad actors giving worse ones. All the knights, flaming arrows and trebuchets (giant catapults) can't fill the yawning void where convincing characters and a credible story at least on its own preposterous terms should be. Johnston is leading an archeological dig at Castelgard, France, un...