When the water supply to the Great Valley is blocked, Littlefoot and his friends must cooperate with a group of bullies to find the reason the cause.
| Actor | Role |
|---|---|
 Scott McAfeeLittlefoot (voice) | Littlefoot (voice) |
 Candace HutsonCera (voice) | Cera (voice) |
 Heather HoganDucky (voice) | Ducky (voice) |
 Jeff BennettPetrie / Mutt / Iguanadon (voice) | Petrie / Mutt / Iguanadon (voice) |
 Rob PaulsenSpike (voice) | Spike (voice) |
 John IngleNarrator / Cera's Father (voice) | Narrator / Cera's Father (voice) |
 Linda GaryGrandma / Mother Quetzalcoatlus (voice) | Grandma / Mother Quetzalcoatlus (voice) |
 Whit HertfordHyp (voice) | Hyp (voice) |
 Nicholas GuestHyp's Father (voice) | Hyp's Father (voice) |
 Tress MacNeilleStegosaurus / Spike & Ducky's Mother (voice) | Stegosaurus / Spike & Ducky's Mother (voice) |
 Frank WelkerVelociraptor (voice) | Velociraptor (voice) |
 Scott MenvilleNod (voice) | Nod (voice) |
 Kenneth MarsGrandpa (voice) | Grandpa (voice) |