Albert Finney
Hercule Poirot

Anthony Perkins
Hector MacQueen

Colin Blakely
Mr. Hardman

Denis Quilley
Antonio Foscarelli

George Coulouris
Dr. Constantine

Ingrid Bergman
Greta Ohlsson

Jacqueline Bisset
Comtesse Andrenyi

Jean-Pierre Cassel
Pierre Paul Michel, the Conductor

John Gielgud
Mr. Beddoes

Lauren Bacall
Mrs. Harriet Belinda Hubbard

Martin Balsam
Signor Bianchi

Michael York
Comte Andrenyi

Rachel Roberts
Hildegarde

Richard Widmark
Ratchett

Sean Connery
Colonel Arbuthnot

Vanessa Redgrave
Mary Debenham

Wendy Hiller
Princess Dragomiroff