 Kerwin MathewsJonathon Standing | Jonathon Standing |
 Christopher LeeCaptain LaRoche | Captain LaRoche |
 Andrew KeirJason Standing | Jason Standing |
 Glenn CorbettHenry | Henry |
 Michael RipperFirst Mate Mack | First Mate Mack |
 Peter ArneBosu'n Hench | Bosu'n Hench |
 Marla LandiBess Standing | Bess Standing |
 Oliver ReedPirate Brocaire | Pirate Brocaire |
 Jerold WellsPenal Colony Master | Penal Colony Master |
 Dennis WatermanTimothy Blackthorne, the boy | Timothy Blackthorne, the boy |
 David LodgeSmith | Smith |
 Jack StewartGodfrey Mason | Godfrey Mason |
 Marie DevereuxMaggie Mason (uncredited) | Maggie Mason (uncredited) |
 Emile StemmlerA villager (uncredited) | A villager (uncredited) |
| BBert SimmsOld Townsman (uncredited) | Old Townsman (uncredited) |
 Denis ShawSilver (uncredited) | Silver (uncredited) |
| JJohn Roden2nd Settler (uncredited) | 2nd Settler (uncredited) |
| EErnie RicePirate (uncredited) | Pirate (uncredited) |
| KKeith PyottSilas (uncredited) | Silas (uncredited) |
 Dido PlumbPrisoner (uncredited) | Prisoner (uncredited) |
 Michael PeakeKemp (uncredited) | Kemp (uncredited) |
 Michael MulcasterMartin (uncredited) | Martin (uncredited) |
 Desmond LlewelynTom Blackthorne (uncredited) | Tom Blackthorne (uncredited) |
 Don LevyCarlos (uncredited) | Carlos (uncredited) |
| GGeorge HilsdonPenal Colony Guard (uncredited) | Penal Colony Guard (uncredited) |
 John CollinLance (uncredited) | Lance (uncredited) |
 Bill BrandonPirate (uncredited) | Pirate (uncredited) |
 Jim BradyPirate (uncredited) | Pirate (uncredited) |
| RRonald BlackmanPugh (uncredited) | Pugh (uncredited) |
 Richard BennettSeymour (uncredited) | Seymour (uncredited) |
