| Roy Battersby | (episodes 1 and 4) | |
| Peter Markham | (episode 2) | |
| Simon Massey | (episode 3) |
| Richard Albrecht | Dr. Snow | |
| Liz May Brice | PC. Sally Higson | |
| Idris Elba | PC Paul Fraser: (segment 3) | |
| Bill Fellows | DCI Bobby Calvert | |
| 汤姆·菲舍尔 | Tony Decker | |
| Aden Gillett | James Glayzer | |
| Stuart Graham | DI. Paul Howard | |
| Lorna Heilbron | Karen Squires QC | |
| Lisa Kay | Lyndsay Aitken | |
| Dermot Keaney | Paul Cox | |
| Jonathon Kemp | Billy | |
| Ross Kemp | Sam Lucas | |
| James Laurenson | Michael Foulds QC | |
| Stephen Mangan | John Henderson | |
| Louisa Millwood-Haigh | Alex Ellmann (segment 2) | |
| Jeff Nuttall | Geoff Wheelan | |
| 索菲·奥康尼多 | Bernie Kramer | |
| Glyn Owen | Will Chaney: (episode 4) | |
| Richard Simpson | Judge | |
| Stanley Townsend | Dr. Jack Gower: (episode 4) | |
| Mark Wakeling | PC. Crispin Mills | |
| Peter Wight | DCI. George Mercer | |
| Sean Wightman | Interrogator | |
| Brigid Zengeni | Martha |
| Helen Gregory | producer | |
| Louise Mutter | associate producer |
| Debbie Wiseman |
| James Aspinall |
| David Spiers |
| Peter Freeman | first assistant director (episode 1) | |
| Jon Older | first assistant director (episode 4) | |
| Jeff Taylor | second assistant director | |
| Diane Kasperowicz | third assistant director |
| Chris Gurney | boom operator | |
| Rosie Straker | production sound mixer |
| Richard Brierley | focus puller | |
| Julie Brown | script supervisor (episode 3) | |
| Chris Green | production accountant | |
| Brian Jones | gaffer | |
| Beverly Winston | script supervisor | |
| Cas Casey | on-line editor |