When the dinosaur families get trapped in a valley by an ice storm, one family of "spike tail" dinosaurs volunteers to leave since they consume more food than the others. Meanwhile, the young dinos and a new adult dinosaur named Mr. Thicknose, head out to bring back their friend Spike, who has left his friends to be with members of his own species.
John Ingle
Rob Paulsen
Thomas Dekker
Anndi McAfee
Jeff Bennett
Susan Krebs
Jeremy Suarez
Kenneth Mars
Miriam Flynn
Robert Guillaume
Aria Noelle Curzon
Tress MacNeille
Danny Mann