| Name | Character | Episodes |
|---|---|---|
| Rosie Cavaliero | DS Susan Reinhart | 6 |
| MyAnna Buring | Jules Hope | 3 |
| Ralph Ineson | DCI Mike Ward | 3 |
| Benedict Wong | Ashley Chan | 3 |
| John Simm | Marcus Farrow | 3 |
| Kieran O'Brien | Phil Prentice | 3 |
| Anastasia Hille | DCI Andrea Mackenzie | 3 |
| Craig Parkinson | Sean Devlin | 3 |
| Philip Glenister | David Murdoch | 3 |
| Adrian Edmondson | DCI Warner | 3 |
| Struan Rodger | Topher Lomax | 3 |
| Nathan Stewart-Jarrett | DC Richard Iddon | 3 |
| Sammy Winward | Lucy Murdoch | 3 |
| Heather Peace | Abi Farrow | 3 |