The Murderer Lives at Number 21 could be straight out of an Agatha Christie novel, an episode of Murder, She Wrote or Midsomer Murders or any other by the numbers murder mystery, which audiences still find as thrilling today as they did 70 years ago. Directed by Henri-Georges Clouzot, Murderer tells the story of Monsieur Durand, a mysterious killer who has seemingly chooses his victims at random, murders them and then leaves a calling card with his name. The only catch? No one knows who this Durand actually is, therefore leaving the town in horror that anyone could be the murderer.