Tony Randall as Hercule Poirot

Anita Ekberg as Amanda Beatrice Cross

Robert Morley as Captain Hastings

Maurice Denham as Inspector Japp

Guy Rolfe as Dr. Duncan Doncaster

Sheila Allen as Lady Diane

James Villiers as Franklin

Julian Glover as Don Fortune

Grazina Frame as Betty Barnad

Clive Morton as Mister X

Cyril Luckham as Sir Carmichael Clarke

Richard Wattis as Wolf

David Lodge as Sergeant

Patrick Newell as Cracknell

Austin Trevor as Judson

Alison Seebohm as Miss Sparks

Windsor Davies as Dragbot

Sheila Reid as Mrs. Fortune

Drewe Henley as Bowling Alley Attendant (uncredited)

Sally Douglas as Glamorous Girl in Gaming Club (uncredited)

Margaret Rutherford as Miss Jane Marple (uncredited)

Stringer Davis as Mr. Stringer (uncredited)

Roger Avon as Detective Sergeant (uncredited)

John Bennett as Waiter (uncredited)

Charlie Bird as Taxi Driver (uncredited)

Robin Burns as Undertaker (uncredited)

Pauline Chamberlain as Gaming Club Patron (uncredited)

Fred Davis as Policeman (uncredited)

Jack Dearlove as Policeman (uncredited)

Eden Fox as Man Waiting for Bus (uncredited)

Victor Harrington as Police Escort (uncredited)

Walter Henry as Police Escort (uncredited)

George Hilsdon as Gaming Club Patron (uncredited)

Anthony Lang as Undertaker (uncredited)

Roy Lansford as Man on Airport Escalator (uncredited)

Fred Machon as Policeman (uncredited)

Lola Morice as Passerby (uncredited)

Jack Silk as Motorcycle Cop (uncredited)

Jeff Silk as Motorcycle Cop (uncredited)

Emile Stemmler as Waiter (uncredited)

John Tatham as Police Detective (uncredited)

Graham Tonbridge as Undertaker (uncredited)