| Name | Character | Episodes |
|---|---|---|
| Alfred Enoch | Jamie McCain | 4 |
| John Hannah | Dr Archie Watson | 4 |
| Sharon Small | Brigitte Rayne | 4 |
| Jodie Whittaker | Cath Hardacre / Ally Sutton | 4 |
| Emun Elliott | Andy Brenner | 4 |
| Ashley Jensen | Debbie Dorrell | 4 |
| Blake Harrison | Karl | 4 |
| Katie Clarkson-Hill | Dr Zoe Wade | 4 |