Albert Aachen is found murdered by a poison dart. There is an A.B.C. guide by the body. <br /><br />Tony Randall as Hercule Poirot<br />Anita Ekberg as Amanda Beatrice Cross<br />Robert Morley as Hastings<br />Maurice Denham as Japp<br />Guy Rolfe as Duncan Doncaster<br />Sheila Allen as Lady Diane Clarke<br />James Villiers as Franklin Clarke<br />Julian Glover as Don Fortune<br />Grazina Frame as Betty Barnard<br />Clive Morton as 'X'<br />Cyril Luckham as Sir Carmichael Clarke<br />Richard Wattis as Wolf<br />David Lodge as Sergeant<br />Patrick Newell as Cracknell<br />Austin Trevor as Judson<br />Alison Seebohm as Miss Sparks<br />Windsor Davies as Dragbot<br />Sheila Reid as Mrs Fortune<br />Roger Avon as Detective Sergeant <br />John Bennett as Waiter <br />Charlie Bird as Taxi Driver <br />Robin Burns as Undertaker <br />Fred Davis as Policeman <br />Stringer Davis as Mr Stringer <br />Jack Dearlove as Policeman <br />Sally Douglas as Glamorous Girl in Gaming Club <br />Eden Fox as Man Waiting for Bus <br />Drewe Henley as Bowling Alley Attendant <br />Walter Henry as Police Escort <br />Anthony Lang as Undertaker <br />Roy Lansford as Man on Airport Escalator <br />Fred Machon as Policeman <br />Lola Morice as Passerby <br />Margaret Rutherford as Miss Jane Marple <br />Jack Silk as Motorcycle Cop <br />Graham Tonbridge as Undertaker
