| Shaun Evans | DS Endeavour Morse |
| Roger Allam | DCI Fred Thursday |
| Caroline O'Neill | Win Thursday |
| Jules Robertson | Debating Society President |
| Caroline Goodall | Lady Bayswater |
| Marcus Griffiths | Marcus X |
| Claire Ganaye | Claudine |
| Ray Sesay | Pte. Oswald |
| Lee Armstrong | Pte. Collier |
| Ian Pirie | Lt. Col. Mad Jack McDuff |
| William Scott-Masson | Col. Champion |
| Robert Portal | Maj. Coward |
| Bert Seymour | 2nd Lt. Rupert Carmichael |
| Greg Austin | Kit Hutchens |
| Rebecca Saire | Hazel Radowicz |
| Jack Bannon | Sam Thursday |
| Sam Marks | Justin Farridge |
| Dominic Carter | CSM Davies |
| Dominic Thorburn | Dr. Rex Laidlaw |
| Leo Hatton | Jean Ward |
| Lewis Peek | DC George Fancy |
| Anton Lesser | Chief Superintendent Reginald Bright |
| Sean Rigby | DS Jim Strange |
| James Bradshaw | Dr. Max DeBryn |
| Steven Elder | Barker |
| Dakota Blue Richards | WPC Shirley Trewlove |
| Sara Vickers | Joan Thursday |