Legends claim that Saurus Rock keeps bad luck out of the Great Valley. Is it really true? Could the mysterious Longneck named Doc be the famous Lone Dinosaur, who can defeat a Sharptooth with his lasso-like tail To find out, Littlefoot and company must cross the great Valley and face a dangerous Sharptooth themselves!
| Actor | Role |
|---|---|
 Thomas DekkerLittlefoot (voice) | Littlefoot (voice) |
 Kenneth MarsGrandpa (voice) | Grandpa (voice) |
 Anndi McAfeeCera (voice) | Cera (voice) |
 Aria Noelle CurzonDucky (voice) | Ducky (voice) |
 Jeff BennettPetrie / Spike (voice) | Petrie / Spike (voice) |
 Nancy CartwrightDana (voice) | Dana (voice) |
 Sandy FoxDinah (voice) | Dinah (voice) |
 Miriam FlynnGrandma (voice) | Grandma (voice) |
 John IngleCera's Dad (voice) | Cera's Dad (voice) |
 Danny MannAllosaurus (voice) | Allosaurus (voice) |
 Kris KristoffersonDoc (voice) | Doc (voice) |