 | Barbara Bach als Amanda Marvin |
 | Claudio Cassinelli als Lt. Claude de Ross |
 | Richard Johnson als Edmond Rackham |
 | Beryl Cunningham als Shakira |
 | Joseph Cotten als Prof. Ernest Marvin |
 | Franco Javarone als Jose |
 | Roberto Posse als Peter |
 | Giuseppe Castellano als Skip |
 | Franco Mazzieri als Francois |
 | Cameron Mitchell als Decker (US version) |
 | Mel Ferrer als Radcliffe (US version) |
 | Eunice Bolt als Samantha (US Version) |
 | Bobby Rhodes als Rackham's Servant (uncredited) |
| Jim Alquist als James (US version) (as James Alquist) |
| Sergio Martino | Director |
| Sergio Donati | Screenplay |
| Luciano Martino | Story |
| Cesare Frugoni | Screenplay |
| Sergio Martino | Screenplay |
| Cesare Frugoni | Story |
| Luciano Martino | Producer |
| Luciano Michelini | Original Music Composer |
| Giancarlo Ferrando | Director of Photography |
| Eugenio Alabiso | Editor |
| Massimo Antonello Geleng | Production Design |
| Maria Rosaria Crimi | Costume Design |
| Roger Corman | Executive Producer |
| Nilo Jacoponi | Makeup Artist |
| Pamela Peitzman | Makeup Artist |
| Manlio Rocchetti | Makeup Artist |
| Stefano Trani | Makeup Artist |
| Chris Walas | Special Effects Makeup Artist |
| Mark Walas | Assistant Makeup Artist |
| Kenny Myers | Assistant Makeup Artist |
| Steve Jerrom | Second Assistant Director |
| Bruno Moreal | Sound Mixer |
| Roberto Petrozzi | Sound Engineer |
