Dale's discovery of a rodent-sized space-traveling Stegosaurus is certainly a surprise to the Rangers; and when the diminutive dinosaur suddenly begins to grow in size and lose intelligence, the rangers have to save him.
- Corey Burton as Dale, Zipper, Dr. Piltdown
- Peter Cullen as Monterey Jack, Scientist
- Jim Cummings as Steggy, Stan Blather, Museum Guard
- Tress MacNeille as Chip, Gadget Hackwrench, Mother, Freckled Boy, Little Girl
Home video releases