 | Trevor Howard als Harry Scobie |
 | Elizabeth Allan als Louise Scobie |
 | Denholm Elliott als Wilson |
 | Peter Finch als Father Rank |
 | Maria Schell als Helen Rolt |
 | Gérard Oury als Yusef |
 | George Coulouris als Portuguese Captain |
 | Michael Hordern als Commissioner |
 | Jane Henderson als Miss Malcot (uncredited) |
 | Earl Cameron als Ali |
 | Judith Furse als Dr Sykes |
| George More O'Ferrall | Director |
| Ian Dalrymple | Producer |
| Lesley Storm | Adaptation |
| Graham Greene | Novel |
| Ian Dalrymple | Script |
| Jack Hildyard | Director of Photography |
| Joseph Bato | Art Direction |
| John Palmer | Production Manager |
| Sidney Stone | Editor |
| Adrian Pryce-Jones | Assistant Director |
| Peter Newbrook | Camera Operator |
| Bert Ross | Sound Recordist |
| Red Law | Sound Recordist |
| Betty Forster | Continuity |
| Tony Sforzini | Makeup Artist |
| Joyce Wood | Hairdresser |
| Julia Squire | Costume Design |
| John Cox | Sound Supervisor |
