Cast
- Schroeder as Greg
- Patty Swanson, Lucy Van Pelt as Murray/Simon
- Violet Gray as Anthony
- Linus Van Pelt as Jeff/Lachy
- Frieda as Dorothy the Dinosaur
- Charlie Brown as Wags the Dog
- Snoopy as Henry the Octopus
- Eudora as Magdalena the Mermaid
- Melanie as Flora Door
- Shermy as Sam Moran