| Name | Character | Episodes |
|---|---|---|
| Douglas Henshall | DCS Hepburn | 3 |
| Geraldine James | 3 | |
| Phil Davis | 3 | |
| Kenny Doughty | 3 | |
| Honor Kneafsey | 3 | |
| Sheridan Smith | Jo Gillespie | 3 |
| Vinette Robinson | 3 | |
| Matthew McNulty | DC Jack Clark | 3 |
| Ace Bhatti | 3 | |
| Andrew Knott | 3 | |
| Sharon Duce | 3 | |
| Lisa Dillon | 3 | |
| Oliver Woollford | 3 | |
| Tara Moran | 3 | |
| James Foster | Glover | 3 |