The Duncan family is beside itself when son Sylvester turns himself into a rock to escape the jaws of a hungry lion.
| Writing | William Steig | Book |
| Directing | Gene Deitch | Director |
| Writing | Gene Deitch | Adaptation |
| Production | Morton Schindel | Producer |
| Production | Zdenka Deitchová | Producer |
| Sound | Jeremy Steig | Music |
| Editing | Jiřina Pěčová | Editor |
| Sound | Paul R. Gagne | Sound Supervisor |
| Sound | Jan Mack | Sound Editor |
| Camera | Jan Chvojka | Camera Operator |
| Camera | Eva Kargerová | Camera Operator |
| Visual Effects | Anna Habartová | Animation |
| Visual Effects | Věra Hainzová | Animation |
| Art | Miluše Hluchaničová | Background Designer |
| Visual Effects | Irena Jandová | Animation |
| Visual Effects | Jirí Michl | Animation |
| Visual Effects | Ondřej Pecha | Animation |