In an earlier TV version of the story in which Peter Ustinov played Poirot, David Suchet played Inspector Japp!
Poirot:You made of me, Hercule Poirot, your cat's paw.
Jane Wilkinson: He wasn't a kind man. Or a good one. But still, no one deserves to die like that.
This episode is based on Agatha Christie's book Lord Edgware Dies (1933).
This episode is also called Thirteen at Dinner.