| Name | Character | Episodes |
|---|---|---|
| Stephen Graham | DCI Thomas 'Taff' Jones | 6 |
| Mark Addy | DS Stan Jones | 6 |
| Alfie Allen | Brett Collins | 6 |
| Freddie Fox | Jeremy Bamber | 6 |
| Mark Stanley | Colin Caffell | 6 |
| Gemma Whelan | Ann Eaton | 6 |
| Alexa Davies | Julie Mugford | 6 |
| Grace Calder | Heather Amos | 6 |
| Amanda Burton | June Bamber | 6 |
| Scott Reid | DC Mick Clark | 6 |
| Cressida Bonas | Sheila Caffell | 6 |