| Name | Character | Episodes |
|---|---|---|
| Anthony Stewart Head | Mr Colubrine | 6 |
| Kris Marshall | 6 | |
| Amanda Abbington | Zoe | 6 |
| Christina Cole | 6 | |
| Bryan Dick | 6 | |
| Ella Smith | 6 | |
| Nicholas Rowe | 1 | |
| Morven Christie | 1 | |
| Richard Harrington | 1 | |
| Nina Sosanya | 1 | |
| Amanda Abbington | 1 | |
| Adam James | 1 | |
| Rufus Jones | 1 | |
| Grant Masters | 1 | |
| John Woodvine | 1 |