A study of absurdity in a suburban family: father recreates the Old Bailey in the living room while the son teaches speak-your-weight machines to sing in the attic.
| Actor | Role |
|---|---|
 Eric SykesMr. Groomkirby | Mr. Groomkirby |
 Julia FosterSylvia | Sylvia |
 Peggy MountMrs. Gantry | Mrs. Gantry |
 Mona WashbourneAunt Mildred | Aunt Mildred |
 George ColeDefence Counsel | Defence Counsel |
 Jonathan MillerKirby | Kirby |
 Alison LeggattMrs. Groomkirby | Mrs. Groomkirby |
 Douglas WilmerJudge | Judge |
 Glyn HoustonDetective Inspector Barnes | Detective Inspector Barnes |
 Graham CrowdenProsecuting Counsel | Prosecuting Counsel |
 Kenneth FarringtonStan | Stan |
 Walter HorsbrughClerk of the Court | Clerk of the Court |
 Frederick PiperUsher | Usher |
| VVincent HardingPoliceman / Bus Conductor | Policeman / Bus Conductor |
| TTommy BruceGormless (voice) | Gormless (voice) |
 Trevor BannisterGroomkirby's Co-Worker | Groomkirby's Co-Worker |