 | Jacques-Yves Cousteau als Self (archive footage) |
 | Dian Fossey als Self (archive footage) |
 | Birute Galdikas als Self |
 | Jane Goodall als Self (archive footage) |
 | Richard Kiley als Self - Narrator |
| Louis Leakey als Self (archive footage) |
| Mary Leakey als Self (archive footage) |
| Kent Vliet als Self (archive footage) |
| Gail Willumsen | Producer |
| Barry Nye | Producer |
| Gail Willumsen | Writer |
| Barry Nye | Editor |
| Jay Chattaway | Music |
| Stephen Croes | Musician |
| Jill Shinefield | Associate Producer |
| Lisa Ann Glass | Assistant Editor |
| Teresa Koenig | Supervising Producer |
| Marjorie M. Moomey | Script Editor |
| Marjorie M. Moomey | Researcher |
| Nancy Severinsen | Music Supervisor |
| M. T. Badertscher | Online Editor |
| Bob Barzyk | Online Editor |
| Kathleen F. Teter | Publicist |
| Ellen C. Stanley | Publicist |
| Marilyn Gibbons | Publicist |
| Kathryn Pasternak | Coordinating Producer |
| Nicolas Noxon | Executive Producer |
