An expedition enters an unexplored jungle to search for a legendary ruby.
| Actor | Role |
|---|---|
 Christopher ConnellyCaptain Yankee | Captain Yankee |
 Lee Van CleefWarren | Warren |
| MMarina CostaMaria Janez | Maria Janez |
 Luciano PigozziGin Fizz | Gin Fizz |
| DDario PontonuttiNot listed | Not listed |
| MMike MontyProfessor Lansky | Professor Lansky |
| RRene AbadezaAlain | Alain |
| CCirillo VitaliNot listed | Not listed |
| FFrancesco ArcuriNot listed | Not listed |
| PProtacio DeeTiger (uncredited) | Tiger (uncredited) |
| CCarolyn De FonsecaMaria Janez (uncredited) (voice) | Maria Janez (uncredited) (voice) |
 Edoardo MargheritiMercenery (uncredited) | Mercenery (uncredited) |
| RRonnie PattersonMercenary (uncredited) | Mercenary (uncredited) |