Have you seen the 1974 production of Murder on the Orient Express? It has an outstanding "international" cast, which includes Sir John Guilgud (I believe pre-dating his "Sir" days), Dame Wendy Hiller (pre-dating her "Dame" days), Vanessa Redgrave, Sean Connery, Ingrid Bergman, Anthony Perkins, Lauren Bacall, Michael York, Martin Balsam, Jacqueline Bisset, Jean-Pierre Cassel, Rachel Roberts, Richard Widmark... The list absolutely goes on and on, doesn't it?!?
Albert Finney does an excellent job as Hercule Poirot, pre-dating David Suchet making the Poirot character his very own!