A team of doctors sets out through a steamy African jungle to check an outbreak of sleeping sickness.
| Actor | Role |
|---|---|
 Marcello MastroianniAlessandrini | Alessandrini |
 Pedro ArmendárizMartinez | Martinez |
 KerimaMadalena | Madalena |
 Charles VanelCarlo Leonardi | Carlo Leonardi |
 Jacques BerthierClemens Van Waerten | Clemens Van Waerten |
 Paul MüllerDr. Assar | Dr. Assar |
 Habib BengliaGomba | Gomba |
| DDolores FrancineLouise | Louise |
| DDomenico MeccoliNot listed | Not listed |
 Philippe LemaireNot listed | Not listed |