 | Eric Sykes als Mr. Groomkirby |
 | Julia Foster als Sylvia |
 | Peggy Mount als Mrs. Gantry |
 | Mona Washbourne als Aunt Mildred |
 | George Cole als Defence Counsel |
 | Jonathan Miller als Kirby |
 | Alison Leggatt als Mrs. Groomkirby |
 | Douglas Wilmer als Judge |
 | Glyn Houston als Detective Inspector Barnes |
 | Graham Crowden als Prosecuting Counsel |
 | Kenneth Farrington als Stan |
| Walter Horsbrugh als Clerk of the Court |
 | Frederick Piper als Usher |
| Vincent Harding als Policeman / Bus Conductor |
| Tommy Bruce als Gormless (voice) |
 | Trevor Bannister als Groomkirby's Co-Worker |
| Peter Yates | Director |
| Stephen Dalby | Sound Director |
| Denys N. Coop | Director of Photography |
| Robin Gregory | Sound Recordist |
| N.F. Simpson | Writer |
| Barbara Gillett | Wardrobe Master |
| Wally Fairweather | Focus Puller |
| Richard Rodney Bennett | Original Music Composer |
| Marcus Dods | Conductor |
| Reece Pemberton | Production Design |
| Peter Taylor | Editor |
| Austin Dempster | Camera Operator |
| Claude Watson | Assistant Director |
| Jane Buck | Continuity |
| Graham Harris | Sound Editor |
| Tom Smith | Makeup Artist |
| Betty Sherriff | Hairdresser |
| Michael Holden | Associate Producer |
| Leigh Aman | Associate Producer |
| Oscar Lewenstein | Executive Producer |
| Michael Deeley | Producer |
