| Music |
| Richard Rodney Bennett (Music composed by), Marcus Dods (Orchestra of the Royal Opera House, Convent Garden conducted by)
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| Writer |
| Paul Dehn (Screenplay by)
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| Director of Photography |
| Geoffrey Unsworth (B.S.C.; Photographed by), Peter MacDonald (Camera Operator), Charles Staffell (B.S.C.; Process Photography)
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| Editor |
| Anne V. Coates (Edited by), Richard Hiscott (Assistant Editor)
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| Story |
| Agatha Christie (-' s)
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| Art Direction |
| Tony Walton (Production Design by), Jack Stephens (Art Director)
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| Costumes |
| Tony Walton (Costumes by), Brenda Dabbs (Wardrobe)
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| Make up |
| Charles Parker (Make up), Stuart Freeborn (Make up), John O'Gorman (Make up)
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| Hair stylist |
| Ramon Gow (Hairdressing Supervisor), Leonard of London (Miss Bergmans and Mr. Finneys hair by)
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| Sound |
| Peter Handford (Sound), Bill Rowe (Sound), Jonathan Bates (Sound Editor)
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| Continuity |
| Angela Allen (Continuity)
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| Production company |
| EMI Film Distributors Ltd. (Nat Cohen presents for), G.W. Films Ltd. (Made by)
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| 1. Regieassistent |
| Ted Sturgis (First Assistant Director)
|
| Producer |
| Nat Cohen (presents for), John Brabourne (A; production), Richard Goodwin (A; production), Jack Causey (Production Manager), Richard Du Vivier (Production Associate), Jim Brennan (Unit Manager), Norton Knatchbull (Location Manager), Elisabeth Woodthorpe (Production Secretary), Louis Fleury (French Production Manager)
|
| Director |
| Sidney Lumet (Directed by)
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