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.
Dzhon Ingl , Ariia Noel' Kurzon , Rob Polsen , Tomas Dekker , Endi MakEfi , Dzheff Bennett , Tress MakNill , S'iuzan Krebs , Dzheremi Suares , Kennet Mars
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