| Actor | Stuart Damon (as Craig Stirling), William Gaunt (as Richard Barrett), Anthony Nicholls (as Cmdr. W.L. Tremayne), Anthony Bate (as Pederson), Harry Towb (as George), Robert Russell (2) (as Maltman), Paul Hansard (as Emil Boder) |
| Actress | Alexandra Bastedo (as Sharron Macready), Patricia Haines (as Sophia) |
Added by Mycdhitzone