Three adventures featuring Agatha Christie's Belgian supersleuth, Hercule Poirot (David Suchet). In 'Mrs McGinty's Dead', when James Bentley (Joe Absolom) is arrested for the murder of old Mrs McGinty, it seems like an open and shut case. But Superintendent Spence (Richard Hope) isn't convinced and calls on Poirot to try and track down the real killer. 'Cat Among the Pigeons' begins when elderly school headmistress, Miss Bulstrode (Harriet Walter), is warned by a parent that she has recognised somebody at the school from her days in the intelligence service. A murder soon follows, and Poirot is on hand to try to solve it. Finally, in 'Third Girl', when a young woman visits Poirot to get his help regarding a murder that she believes she has committed, she is shocked by his age and leaves without telling her story. Poirot is keen to track her down and establish whether she is guilty, innocent or just plain insane.