| Actor | Stuart Damon (as Craig Stirling), William Gaunt (as Richard Barrett), Anthony Nicholls (as Cmdr. W.L. Tremayne), Joseph Fürst (as Dr. Rudolf Mueller) |
| Actress | Alexandra Bastedo (as Sharron Macready) |
Added by Mycdhitzone
| Actor | Stuart Damon (as Craig Stirling), William Gaunt (as Richard Barrett), Anthony Nicholls (as Cmdr. W.L. Tremayne), Joseph Fürst (as Dr. Rudolf Mueller) |
| Actress | Alexandra Bastedo (as Sharron Macready) |