Quick recap
The eccentric Mr Shaitana invites four detectives (Poirot, novelist Ariadne Oliver, Superintendent Battle and Colonel Race) to dinner along with four people he believes got away with murder. Afterward the two groups play bridge in separate rooms. By the end of the evening Shaitana is dead in his armchair, stabbed, and nobody saw a thing. Poirot studies the bridge scores to read each suspect's mind. Mrs Lorrimer confesses and is soon found dead. Young Anne Meredith drowns while trying to kill a friend. In the end Poirot proves the killer is Dr Roberts, who also murdered Mrs Lorrimer.
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