| Name | Character | Episodes |
|---|---|---|
| John Hannah | DI Steven Grover | 4 |
| Kelly Macdonald | Anna Dean | 4 |
| Ramon Tikaram | Solomon Mishra | 4 |
| Chloe Pirrie | Ella Mackie | 4 |
| James Harkness | Craig Myers | 4 |
| Pooky Quesnel | Mo Buckley | 4 |
| Isis Hainsworth | Louise Graham | 4 |
| Jamie Sives | Lenny Dean | 4 |