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.

• Universal Cartoon Studios
• Wang Film Productions
• John Ingle
• Rob Paulsen
• Thomas Dekker
• Anndi McAfee
• Jeff Bennett
• Susan Krebs
• Jeremy Suarez
• Kenneth Mars