| Name | Character | Episodes |
|---|---|---|
| Dougray Scott | David Warnock | 3 |
| Gilly Gilchrist | Vernon | 3 |
| Morven Christie | Ellen Rooney | 3 |
| Vicky McClure | Paula Reece | 3 |
| Neve McIntosh | Kay Gillies | 3 |
| Sarah MacRae | Rianne | 3 |
| Navin Chowdhry | Keiran | 3 |
| Siobhan Redmond | Beth | 3 |
| Euan Macnaughton | DS Colin Lockheid | 3 |
| Kim Allan | Lucy | 3 |