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)