Maciste and his people flee their volcano-ravaged island. They end up caught in between two warring tribes.
You can now watch Colossus and the Headhunters online on the following streaming providers in the United States.
| Sound | Guido Robuschi | Music |
| Sound | Gian Stellari | Music |
| Directing | Guido Malatesta | Director |
| Production | Giorgio Marzelli | Producer |
| Writing | Guido Malatesta | Writer |
| Writing | Guido Malatesta | Screenplay |
| Camera | Domenico Scala | Director of Photography |
| Editing | Enzo Alfonsi | Editor |
| Art | Giuseppe Ranieri | Production Design |
| Costume & Make-Up | Nadia Vitali | Costume Design |
| Costume & Make-Up | Franco Corridoni | Makeup & Hair |