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.
| Actor | Role |
|---|---|
 John IngleNarrator / Cera's Dad (voice) | Narrator / Cera's Dad (voice) |
 Rob PaulsenSpike / Stegosaurus Leader (voice) | Spike / Stegosaurus Leader (voice) |
 Thomas DekkerLittlefoot (voice) | Littlefoot (voice) |
 Anndi McAfeeCera (voice) | Cera (voice) |
 Jeff BennettPetrie / Corythosaurus (voice) | Petrie / Corythosaurus (voice) |
 Susan KrebsTippy's Mom / Ankylosaurus (voice) | Tippy's Mom / Ankylosaurus (voice) |
 Jeremy SuarezTippy (voice) | Tippy (voice) |
 Kenneth MarsGrandpa / Lambeosaurus (voice) | Grandpa / Lambeosaurus (voice) |
 Miriam FlynnGrandma (voice) | Grandma (voice) |
 Robert GuillaumeMr. Thicknose (voice) | Mr. Thicknose (voice) |
 Aria Noelle CurzonDucky (voice) | Ducky (voice) |
 Tress MacNeilleDucky's Mom / Petrie's Mom (voice) | Ducky's Mom / Petrie's Mom (voice) |
 Danny MannAlbertosaurus (voice) (uncredited) | Albertosaurus (voice) (uncredited) |