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Francesca Annis as Lady Frances Derwent |
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John Gielgud as Reverend Jones |
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Bernard Miles as Dr. Thomas |
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Eric Porter as Dr. Nicholson |
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Leigh Lawson as Roger Bassington-ffrench |
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James Warwick as Bobby Jones |
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Madeline Smith as Moira Nicholson |
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Connie Booth as Sylva Bassington-ffrench |
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Joan Hickson as Mrs. Rivington |
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Lynda La Plante as Mrs. Roberts |
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Doris Hare as Rose Pratt |
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James Cossins as Henry Bassington-ffrench |
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Robert Longden as Badger Beadon |
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Roland Davies as Dr. George Arbuthnot |
| Directing | John Davies | Director |
| Directing | Tony Wharmby | Director |
| Writing | Agatha Christie | Novel |
| Writing | Pat Sandys | Writer |
| Production | Tony Wharmby | Executive Producer |
| Production | Jack Williams | Producer |
| Sound | Joseph Horovitz | Original Music Composer |
| Camera | Mike Humphreys | Director of Photography |
| Editing | Ray Helm | Editor |
| Art | Bryan Bagge | Production Design |
| Art | Frank Nerini | Production Design |
| Production | Corinne Rodriguez | Casting |
| Costume & Make-Up | Penny Lowe | Costume Design |
| Costume & Make-Up | Pauline Green | Makeup Artist |
| Sound | Alan Mills | Sound |
