An American movie actress, best known for playing dumb blondes, is Scotland Yard's prime suspect when her husband, Lord Edgware, is murdered.
Peter Ustinov as Hercule Poirot Faye Dunaway as Jane Wilkinson/Carlotta Adams David Suchet as Inspector Japp Jonathan Cecil as Captain Arthur Hastings Bill Nighy as Ronald Marsh Diane Keen as Jenny Driver John Stride as Film Director Benedict Taylor as Donald Ross Lee Horsley as Bryan Martin Allan Cuthbertson as Sir Montague Corner Glyn Baker as Lord Edgware's Butler John Barron as Lord Edgware Peter Clapham as Mr Wildburn Lesley Dunlop as Alice Bennett Avril Elgar as Miss Carroll Oriane Grieve as Serious Actress (as Orianne Grieve) Russell Grant as Moxon (as Russell Keith-Grant) Roger Milner as Duke of Merton's Footman David Neville as Fluttering Young Man Amanda Pays as Geraldine Marsh John Quarmby as Sir Montague's butler Geoffrey Rose as Duke of Merton Pamela Salem as Mrs Wildburn Jean Sincere as Ellis the Maid Lou Antonio as Movie Producer Harry Fielder as Assistant Director David Frost as Self Pat Gorman as Reporter
