| Name | Character | Episodes |
|---|---|---|
| Mark Bonnar | D.S. Ben Holt | 5 |
| Emun Elliott | Dr. Christian King | 5 |
| Tamzin Outhwaite | D.I. Rebecca Flint | 5 |
| Lorcan Cranitch | Simon Manning | 5 |
| Chiké Okonkwo | D.C. Callum Gada | 5 |
| Kenny Doughty | 1 | |
| Sacha Dhawan | 1 | |
| Kevin Doyle | 1 | |
| Daniel Ryan | 1 | |
| Sam Hazeldine | 1 | |
| Lucy Gaskell | 1 |