From circa 1992, here is a 4-part BBC Radio presentation of the great Agatha Christie novel with John Moffatt as Hercule Poirot and Simon Williams as Captain Hastings.
Directed by Enyd Williams and dramatized by Michael Bakewell, Thirteen at Dinner revolves around the murder of Lord Edgware. His wife wants a divorce but Edgware refuses to grant her one. Lady Edgware jokes with Poitot that she may have to kill her husband...then he dies and it's no longer a joke.
Am I spoiling things by mentioning that Nicola Pagett gives two stellar perfromances here? I am Well, forget I said that.
Enjoy this classic mystery thriller.