Posing as wealthy tourists, an adventurous couple (William H. Macy, Téa Leoni) convince paleontologist Alan Grant (Sam Neill) and his protégé (Allesandro Nivola) to act as tour guides on a flyover trip to Isla Sorna, the ill-fated "Site B" where all hell broke loose in The Lost World: Jurassic Park. In truth, they're on a search-and-rescue mission to find their missing son (Trevor Morgan), and their plane crash is just the first of several enjoyably suspenseful sequences. Director Joe Johnston (October Sky) embraces the formulaic plot as a series of atmospheric set pieces, placing new and familiar dinosaurs in misty rainforests, fiery lakes, and mysterious valleys, turning JP3 into a thrill ride with impressive highlights (including a T. rex versus spinosaurus smack-down), adequate doses of wry humor (from the cowriters of Election), and an upbeat ending that's corny but appropriate, proving that the symptoms of sequelitis needn't be fatal. --Jeff Shannon