 | Giuliano Gemma als Billy Boy aka Tim Hawkins |
 | Mario Adorf als Harry |
 | Magda Konopka als Widow Dorothy McDonald |
 | Federico Boido als Roger Pratt |
| Julie Menard als Sirene / Donna |
 | Anthony Dawson als Samuel Pratt |
 | Cris Huerta als Fat man in stagecoach |
 | Sandro Dori als Sirene's husband |
| Franco Lantieri |
 | Franco Balducci als Brent |
| Paul Branco |
 | Giovanni Ivan Scratuglia |
 | Paolo Magalotti |
| Bruno Ariè |
 | John Bartha |
 | Omero Capanna |
 | Amerigo Castrighella |
| Enrico Chiappafreddo |
 | Luigi Ciavarro |
| Mario Dardanelli |
 | Alberto Dell'Acqua |
 | Víctor Israel |
 | Romano Milani |
 | Nino Musco |
| Mario Pennisi |
 | Renzo Pevarello |
 | Renato Pinciroli |
 | Riccardo Pizzuti |
 | Mimmo Poli |
 | Benito Stefanelli |
| Franco Ukmar |
| Giulio Petroni | Director |
| Gianni Hecht Lucari | Producer |
| Fausto Saraceni | Executive Producer |
| Gastone Di Giovanni | Camera Operator |
| Piero Filippone | Production Design |
| Ennio Morricone | Original Music Composer |
| Enzo Alabiso | Editor |
| Carlo Carlini | Director of Photography |
| Erasmo Bacciucchi | Special Effects |
| Carlo Gervasi | Set Decoration |
| Franco Di Girolamo | Makeup Artist |
| Luciana Fortini | Costume Design |
| Fausto Saraceni | Story |
| Stefano Strucchi | Story |
| Stefano Strucchi | Screenplay |
| Bernardino Zapponi | Screenplay |
| Renato Jaboni | Production Manager |
| Bruno Nicolai | Conductor |
