| Name | Character | Episodes |
|---|---|---|
| Samuel Anderson | Mackenzie | 6 |
| Jeanne Goursaud | Jenny Krause | 6 |
| Jefferson Hall | Ben Anders | 6 |
| Lucian Msamati | Henry Maitland | 6 |
| Harry Treadaway | David Hunter | 6 |
| Katie Leung | Maggie Cassidy | 4 |
| David Hayman | 3 | |
| Douglas Russell | 3 | |
| Nina Singh | 3 | |
| Neve McIntosh | 3 | |
| Nick Blood | 3 | |
| Amy Manson | 3 | |
| Hardy Krüger Jr. | 3 | |
| Ellen Francis | 3 | |
| Alex Price | 2 | |
| Stuart Bowman | Iain Kinross | 2 |
| Stuart Bowman | 2 | |
| Anna Andresen | 2 | |
| Amy Nuttall | 2 | |
| Lewis Gribben | 2 | |
| Lewis Gribben | Kevin Kinross | 2 |
| Roger Morlidge | Harry Timmis | 2 |
| Lauren O'Rourke | 2 | |
| David Hayman | Andrew Brody | 1 |
| Douglas Russell | Sean MacDonald | 1 |
| Nina Singh | Mary Fraser | 1 |
| Neve McIntosh | Josie Fraser | 1 |
| Alex Price | Gary Yates | 1 |
| Nick Blood | Michael Strachan | 1 |
| Amy Manson | Ellen McLeod | 1 |
| Hardy Krüger Jr. | Gunther | 1 |
| Cameron Jack | Craig Robertson | 1 |
| Anna Andresen | Linda Yates | 1 |
| Jacqueline Boatswain | Diana Maitland | 1 |
| Amy Nuttall | Grace Strachan | 1 |
| Charlie Rix | 1 | |
| Charlie Rix | Shane Brenner | 1 |
| Roger Morlidge | 1 | |
| Lauren O'Rourke | Tina Harper | 1 |
| Ellen Francis | Kara Hunter | 1 |