 Keith BarronCommander Jack Bentham | Commander Jack Bentham |
 Alun ArmstrongDet. Supt. Frank Burroughs | Det. Supt. Frank Burroughs |
| TTom MarshallDet. Insp. Bill Senior | Det. Insp. Bill Senior |
 Dudley SuttonDep. Commissioner Sir Harry Streeter | Dep. Commissioner Sir Harry Streeter |
| GGillian EatonMaureen Fry | Maureen Fry |
 Keith AllenDet. Supt. Alan Horsefell | Det. Supt. Alan Horsefell |
| BBrinley JenkinsChief Constable Maurice Probert | Chief Constable Maurice Probert |
| CClyde PollittDep. Chief Constable Donald Preece | Dep. Chief Constable Donald Preece |
 David RyallSir Cyril Llewellyn | Sir Cyril Llewellyn |
 Alan DevlinSir Rex Ferriday | Sir Rex Ferriday |
 Shirley KingMuriel Dumont | Muriel Dumont |
 Robert BlytheChief Insp. Price | Chief Insp. Price |
 Martin TroakesChief Supt. Jones | Chief Supt. Jones |
| BBernard LathamSupt. I.D. Parade | Supt. I.D. Parade |
 Richard HarringtonKit Davis | Kit Davis |
 Roger BrierleyJulian Brind | Julian Brind |
 Derek HutchinsonSgt. Hooper | Sgt. Hooper |
 Guy WilliamsLawrence Payne | Lawrence Payne |
| JJenny DownhamJane Whitehouse | Jane Whitehouse |
| MMike HaywardSupt. Williams | Supt. Williams |
 Richard LynchPC Maurice Peters | PC Maurice Peters |
 Ian RowlandsPC Kevin Pratley | PC Kevin Pratley |
| JJane PhillipsAngela Fry | Angela Fry |
| BBecca Parry JonesKathleen Fry | Kathleen Fry |
| RRichard VatsalooStephen Fry | Stephen Fry |
 Stephen K. AmosFloyd | Floyd |
| RRoger NottDetective | Detective |
 Lynette EdwardsStaff Nurse | Staff Nurse |
| DDavid LeverReporter | Reporter |
| RRussell GomerCardiff Driver | Cardiff Driver |