| Name | Character | Episodes |
|---|---|---|
| Michael C. Hall | Tom Delaney | 8 |
| Audrey Fleurot | Zoe Chahal | 8 |
| India Fowler | Ellen Mason | 8 |
| Hero Fiennes Tiffin | Ioan Fuller | 8 |
| Marc Warren | Pete Mayfield | 8 |
| Amy James-Kelly | Jenny Delaney | 8 |
| Amanda Abbington | Sophie Mason | 8 |
| Freddie Thorp | Chris Chahal | 8 |
| Emmett Scanlan | Josh Mason | 8 |
| Nigel Lindsay | JoJo Marshall | 8 |
| Laila Rouass | Lauren Marshall | 8 |
| Hannah Arterton | Emma Castle | 8 |
| Louis Greatorex | Henry Mason | 8 |
| Isabelle Allen | Carrie Delaney | 8 |