Two scientists involved in chimpanzee research -- one maintaining that the animals should be kept in their native habitat in Africa without human interference, the other trying to train them in sign language in a domesticated atmosphere -- join forces when they learn that the government plans to cut off the language grant and use the chimps for radiation research.
| Actor | Role |
|---|---|
 Granville Van DusenDr. Rafelson | Dr. Rafelson |
 Linda GrayLinda Davenport | Linda Davenport |
| FFrank LoganSerre | Serre |
 Raymond ForchionHabibu | Habibu |
| SSharon AndersonLakelea | Lakelea |
| BBill GribblePeter | Peter |
| JJoan MurphyRose Bower | Rose Bower |
| BBruce McLaughlinDean Anderson | Dean Anderson |
| FFred BuchPalmer | Palmer |
| WWalter ZukovskiWalter O'Neill | Walter O'Neill |
| JJack McDermottBarton | Barton |
| SShelley SpurlockSecretary | Secretary |
| KKevan NorthKevin Bower | Kevin Bower |
| SSean Cunningham1st Boy | 1st Boy |
| TTeddy Milford2nd Boy | 2nd Boy |
| BBernard Ivey1st European | 1st European |
| RRick Rhodes2nd European | 2nd European |
| SScott EarickPoacher | Poacher |