| Name | Character | Episodes |
|---|---|---|
| Sinéad Keenan | DI Paula Cassidy | 5 |
| James Frain | Damian Campbell | 5 |
| Adeel Akhtar | Sam Gill | 5 |
| Joe Dempsie | DI Miles Southgate | 5 |
| Celine Buckens | Talitha Campbell | 5 |
| Kerr Logan | James Thornley | 5 |
| Sharon D. Clarke | Virginia Hoult | 5 |
| Tracy Ifeachor | Cleo Roberts | 5 |
| Rupert Holliday-Evans | Brian Reeves | 5 |
| Amy Morgan | Heidi Mckinnon | 5 |
| Lolita Chakrabarti | Meera Harwood | 5 |
| Rebecca Grant | Niche Barie | 5 |
| Abra Thompson | Hannah Ellis | 5 |
| Christopher Hatherall | DC Andy Lowell | 5 |
| Claire Lams | Andrea Ellis | 5 |
| Georgia Small | Alice | 1 |