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Frankie Howerd as Foster Twelvetrees |
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Ray Milland as Stewart Henderson |
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Hugh Burden as Reggie Henderson |
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Kenneth Griffith as Ernest Henderson |
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John Bennett as Patel |
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Rosalie Crutchley as Jessica Henderson |
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Ruth Dunning as Agnes Henderson |
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Elizabeth MacLennan as Verity Henderson |
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Aimée Delamain as Mother |
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Peter Munt as Cabbie |
| Directing | Peter Sykes | Director |
| Writing | Clive Exton | Writer |
| Costume & Make-Up | Ramon Gow | Hairdresser |
| Directing | Michael Dryhurst | Assistant Director |
| Production | Clive Exton | Producer |
| Production | Terry Nation | Producer |
| Costume & Make-Up | Jill Carpenter | Makeup Artist |
| Production | Beryl Vertue | Executive Producer |
| Production | Edward Joseph | Production Supervisor |
| Art | Andrew Campbell | Set Decoration |
| Editing | Bill Blunden | Editor |
| Camera | Ian Wilson | Director of Photography |
| Sound | Rene Borisewitz | Sound Recordist |
| Sound | Harry Robertson | Music |
| Art | Maurice Carter | Art Direction |
| Costume & Make-Up | Judy Moorcroft | Costume Design |
| Camera | Neil Binney | Camera Operator |
| Sound | Ken Barker | Sound Recordist |
| Writing | Terry Nation | Writer |
