 | Roland Wybenga als Professor Alan Whitmore |
 | Claudio Capone als Professor Alan Whitmore (voice) |
 | Paola Rinaldi als Genevieve Weiss |
| Margareta von Krauss als Celia Roth |
 | Claudia Muzii als Maria |
 | William Berger als Mysterious Man |
 | Stéphane Audran als Mrs. Kuhn |
| Vanna Busoni als Signora Kuhn (voice) |
| Valeriano Santinelli |
| Massimiliano Pavone |
 | Arnaldo Dell'Acqua als Polgár Móricz |
| László Sipos |
| Bob Holton |
 | Bill Bolender als Chancellor Hubbard |
 | Attila Lőte |
| John Morrison |
| Gianfranco Giagni | Director |
| Tonino Cervi | Producer |
| Sergio Stivaletti | Special Effects |
| Franco Piersanti | Compositors |
| Riccardo Aragno | Screenplay |
| Tonino Cervi | Screenplay |
| Cesare Frugoni | Screenplay |
| Gianfranco Manfredi | Screenplay |
| Franco Piersanti | Original Music Composer |
| Sergio Montanari | Editor |
| Stefano Maria Ortolani | Production Design |
| Stefano Maria Ortolani | Art Direction |
| Nicoletta Ercole | Costume Design |
| Margherita Reginato | Script Supervisor |
| Sebastiano Celeste | Director of Photography |
