A British colonial policeman in Africa, circa 1900, pursues a band of escaped killers across territory so wild, it lies just "one step to hell."
| Actor | Role |
|---|---|
 Ty HardinLt. King Edwards | Lt. King Edwards |
 Pier AngeliAnn Peterson | Ann Peterson |
 Rossano BrazziDr. Hamilton | Dr. Hamilton |
 George SandersCaptain Walter Phillips | Captain Walter Phillips |
 Luciano PigozziKirby | Kirby |
 Helga LinéDeborah | Deborah |
 Dale CummingsNot listed | Not listed |
| GGeorge RigaudAnders | Anders |
 Julio PeñaNot listed | Not listed |
 Pamela TudorNot listed | Not listed |
 Antonio MayansMario | Mario |
 Miguel del CastilloTachard | Tachard |
| FFred CoplanNot listed | Not listed |
| MMartha VillardiNot listed | Not listed |
| FFernando VillenaNot listed | Not listed |
| SSalvatore LagoNot listed | Not listed |
 Simon SabelaNot listed | Not listed |
| FFranca CelliNot listed | Not listed |
| MMario d'AttinoNot listed | Not listed |
 Mario DonatoneNot listed | Not listed |
| EEmanuele GonzalesNot listed | Not listed |
| EElton QuirogaNot listed | Not listed |