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Villains who appeared in Hercule Poirot stories by Dame Agatha Christie, and any of its adaptations. This category is specifically for the villains that appeared in Dame Christie's stories directly featuring the fictional Belgian detective, Hercule Poirot, as their protagonist. It includes most of the killers and many of other unscrupulous characters (including some of the victims, witnesses and even bystanders) of all kinds Poirot had encountered.

For villains in Miss Marple series and other non-Poirot stories, please visit here instead, which includes but not limited to villains from Poirot stories.