Belgian detective Hercule Poirot, along with pals Hastings, Japp and Miss Lemon, investigates the murder of an aristocrat with many enemies. Carlotta: Fiona Allen. Bryon Martin: Dominic Guard. Jane: Helen Grace. Lord Edgware: John Castle. Alton: Christopher Guard. Miss Carroll: Lesley Nightingale. Poirot: David Suchet. Miss Lemon: Pauline Moran. Hastings: Hugh Fraser. Japp: Philip Jackson. Directed by Brian Farnham.