| Name | Character | Episodes |
|---|---|---|
| Stephen Young | Nick King | 30 |
| Austin Willis | Admiral Henry Victor Leslie Fox | 30 |
| Gordon Pinsent | Grainger | 4 |
| Harold J. Stone | Enzo Morell | 2 |
| Lynda Day George | Leonora | 2 |
| Rita Moreno | Annabelle | 1 |
| Chris Wiggins | Bob Roberts | 1 |
| Chris Wiggins | McCrea | 1 |
| Gordon Pinsent | Coffin | 1 |
| Jack Ging | Joe Threerivers | 1 |
| Jeremy Slate | Captain Kerr | 1 |
| Marisa Pavan | Feyda | 1 |
| Susan Clark | Kate Lynch | 1 |