Peter Ustinov
Hercule Poirot
James Mason
Odell Gardener
Sylvia Miles
Myra Gardener
Roddy McDowall
Rex Brewster
Maggie Smith
Daphne Castle
Jane Birkin
Christine Redfern
Nicholas Clay
Patrick Redfern
Diana Rigg
Arlena Stuart Marshall
Denis Quilley
Kenneth Marshall
Colin Blakely
Horace Blatt
Emily Hone
Linda Marshall
Paul Antrim
Police Inspector
Cyril Conway
Police Surgeon
John Alderson
Police Sergeant
Richard Vernon
Flewitt
Dimitri Andreas
Gino
Robert Dorning
Concierge
Barbara Hicks
Flewitt's Secretary