Tony Randall
Hercule Poirot
Anita Ekberg
Amanda Beatrice Cross
Robert Morley
Captain Hastings
Maurice Denham
Inspector Japp
Guy Rolfe
Dr. Duncan Doncaster
Sheila Allen
Lady Diane
James Villiers
Franklin
Julian Glover
Don Fortune
Grazina Frame
Betty Barnad
Clive Morton
Mister X
Cyril Luckham
Sir Carmichael Clarke
Richard Wattis
Wolf
David Lodge
Sergeant
Patrick Newell
Cracknell
Austin Trevor
Judson
Alison Seebohm
Miss Sparks
Windsor Davies
Dragbot
Sheila Reid
Mrs. Fortune
Drewe Henley
Bowling Alley Attendant (uncredited)
Sally Douglas
Glamorous Girl in Gaming Club (uncredited)
Margaret Rutherford
Miss Jane Marple (uncredited)
Stringer Davis
Mr. Stringer (uncredited)
Roger Avon
Detective Sergeant (uncredited)
John Bennett
Waiter (uncredited)
Charlie Bird
Taxi Driver (uncredited)
Robin Burns
Undertaker (uncredited)
Pauline Chamberlain
Gaming Club Patron (uncredited)
Fred Davis
Policeman (uncredited)
Jack Dearlove
Policeman (uncredited)
Eden Fox
Man Waiting for Bus (uncredited)
Victor Harrington
Police Escort (uncredited)
Walter Henry
Police Escort (uncredited)
George Hilsdon
Gaming Club Patron (uncredited)
Anthony Lang
Undertaker (uncredited)
Roy Lansford
Man on Airport Escalator (uncredited)
Fred Machon
Policeman (uncredited)
Lola Morice
Passerby (uncredited)
Jack Silk
Motorcycle Cop (uncredited)
Jeff Silk
Motorcycle Cop (uncredited)
Emile Stemmler
Waiter (uncredited)
John Tatham
Police Detective (uncredited)
Graham Tonbridge
Undertaker (uncredited)