 | Penny Patterson als Herself |
 | Koko als Herself |
| Saul Kitchener als Himself - Director Emeritus, San Francisco Zoo |
| Carl Pribram als Himself - Professor of Neuroscience |
| Roger Fouts als Himself |
| Barbet Schroeder | Director |
| Dominique Auvray | Editor |
| Margaret Ménégoz | Producer |
| Néstor Almendros | Director of Photography |
| Denise de Casabianca | Editor |
| Guta Cattoni | Original Music Composer |
| Dale Djerassi | Associate Producer |
| Barbet Schroeder | Associate Producer |
| Maris Embiricos | Original Music Composer |
| Ned Burgess | Assistant Camera |
| Lee Alexander | Sound |
| Leslie Otis | Camera Operator |
| Jonathan Liebling | Foley Artist |
| Hal Trussell | Gaffer |
| Roselyne Petit | Assistant Editor |
| George Paul Csicsery | Assistant Director |
