| Name | Character | Episodes |
|---|---|---|
| Holger Hagen | Carl Müller | 26 |
| Mark Lee | Nick | 26 |
| Hu Pryce | Bailey | 26 |
| Angela Punch McGregor | Isobel Kane | 1 |
| Norman Bowler | Campbell King | 1 |
| Mary Kerridge | Emily Carruthers | 1 |
| Peter Adams | Wilson | 1 |
| John McCallum | Sir Bernard Kelvin | 1 |
| Hussein Abu Hassan | Inspector Hamid | 1 |