In this animated adventure, Littlefoot the Dinosaur (voice of Thomas Dekker) and his friends return as they live in fear of the "Sharp Tooths," a pack of vicious T-Rexes who don't get along with other prehistoric animals. Littlefoot finds inspiration in the stories passed along by his elders of The Lone Dinosaur, a Brontosaurus who helped defend his tribe from angry predators. When Doc (voice of Kris Kristofferson), a strong but soft-spoken older dinosaur, arrives in Littlefoot's camp, the younger lizard wonders if Doc might be the Lone Dinosaur of legend, travelling incognito. Kenneth Mars, Nancy Cartwright, and Miriam Flynn also lend their voices to this film.