| Complete credited cast: | |||
| Richard Benjamin | ... | Tom | |
| Dyan Cannon | ... | Christine | |
| James Coburn | ... | Clinton | |
| Joan Hackett | ... | Lee | |
| James Mason | ... | Philip | |
| Ian McShane | ... | Anthony | |
| Raquel Welch | ... | Alice | |
| Yvonne Romain | ... | Sheila (as Yvonne Romaine) | |
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Pierre Rosso | ... | Vittorio |
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Serge Citon | ... | Guido |
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Robert Rossi | ... | Captain |
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Elaine Geisinger | ... | American Wife |
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Elliot Geisinger | ... | American Husband |
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Jack Pugeat | ... | Silver Salesman |
Sheila Green (Yvonne Romain) is killed in a hit-and-run car accident while walking home from a party one night. A year later, her multi-millionaire husband, Clinton (James Coburn), invites a group of friends (James Mason, Raquel Welch, Dyan Cannon, Richard Benjamin, Joan Hackett, and Ian McShane) to spend a week with him on his yacht. Clinton loves to play elaborate games and he assigns everyone a secret - one is an alcoholic, another an informer and so on - that they are not to share with anyone. Every day for the next six days, they will call into a port where they will be given clues to discover one person's secret. The game takes a deadly twist when a murder tales place and it all has to do with the game they have been playing and the secrets that Clinton assigned at the outset. Written by garykmcd
Great performances, marvelous dialogue and a deliciously dark sense of humour makes this one loads of fun for repeated viewings. The ensemble cast works very well together, and the brain candy never stops. And the payoff is well worth waiting for. Never has a song punctuated the final scene so well.