 | Richard Boone als Masten Thrust Jr. |
 | Joan Van Ark als Francesca Banks |
 | Steven Keats als Chuck Wade |
 | Luther Rackley als Bunta |
| Masumi Sekiya als Hazel |
| William Ross als Hal - Mother 1 Technician |
| Carl Hansen als Barney |
| Nancy Magsig als Thrusts' Girl on Plane |
 | Don Maloney als Mother 1 Captain |
| Vanessa Cristina als Reporter |
 | Tetsu Nakamura als Dr. Kawamoto |
 | Shunsuke Kariya als Caveman Leader |
| Toru Kawai als Tyrannosaurus |
| Tatsumi Nikamoto als Triceratops |
| Jules Bass | Producer |
| Arthur Rankin, Jr. | Producer |
| Minoru Kozono | Editor |
| Yuji Hiyoshi | Sound Editor |
| Kazuo Ohashi | Special Effects Coordinator |
| William Overgard | Writer |
| Shohei Tôjô | Second Unit |
| Sadao Sato | Visual Effects |
| Kazuo Sagawa | Special Effects |
| Tetsuzô Ôsawa | Special Effects |
| Minoru Nakano | Visual Effects |
| Hisaaki Yoneyama | Lighting Technician |
| Noboru Tsuburaya | Producer |
| Kazuhiko Fujiwara | Art Direction |
| Moriake Uematsu | Special Effects |
| Yoshiyuki Yoshimura | Special Effects Coordinator |
| Michihisa Miyashige | Visual Effects |
| Yoshitami Kuroiwa | Editor |
| Tsugunobu Kotani | Director |
| Minoru Kurita | Production Director |
| Alexander Grasshoff | Director |
| Yasuo Kitazawa | Visual Effects |
| Tatsuji Nakashizu | Editor |
| Kenjiro Hirose | Music Director |
| Kinshiro Ohkubo | Associate Producer |
| Masaki Îzuka | Associate Producer |
| Maury Laws | Original Music Composer |
| Kazuyoshi Kasai | Associate Producer |
| Shôji Ueda | Director of Photography |
| Benni Korzen | Associate Producer |
| Maury Laws | Songs |
| Jules Bass | Lyricist |
