| Name | Character | Episodes |
|---|---|---|
| Robbie Coltrane | Douglas Hain | 3 |
| Sharon Small | Dr. Laura Maitland | 3 |
| Bel Powley | Carrie Walsh | 3 |
| Andrew Tiernan | Whitaker | 3 |
| Jason Watkins | 3 | |
| Lucy Cohu | Sally | 3 |
| Lorraine Ashbourne | Rachel | 3 |
| Yasmin Paige | Jess | 3 |
| Amanda Hale | Carol Walsh | 3 |
| Nicholas Gleaves | Oliver | 3 |
| Guy Henry | Crawford | 3 |
| Michael Bertenshaw | Steve Tobias | 3 |