A dinner guest compares the labours of Poirot to those of his mythological namesake, Hercules, the Greek hero, and the great detective is not amused. Poirot has already decided to retire but, as a suitable farewell, he will take on twelve monumental cases that correspond to the twelve Labours of Hercules.

Mystery surrounds a young woman after her new husband is killed in the London Blitz, but with the discovery of new information, Poirot wonders about her true motives

"What I intend to say to you will come as a shock ..." With these words, Lady Athelinda Playford -- one of the world's most beloved children's authors -- springs a surprise on the lawyer entrusted with her will. As guests arrive for a party at her Irish mansion, Lady Playford has decided to cut off her two children without a penny . . . and leave her vast fortune to someone else: an invalid who has only weeks to live. Among Lady Playford's visitors...

Poirot agrees to visit the husband of a famous actress to urge him to reconsider her request for a divorce. Edgware insists that he has already agreed to his wife's request. Yet, within twenty-four hours, he is found murdered

When Linnet Doyle steals and marries her best friend's fiance, the best friend gets her revenge by hounding the newlyweds. On a pleasure cruise down the Nile, the widely despised Mrs. Doyle is found murdered. Thank goodness Poirot is along for the ride

Belgian detective Hercule Poirot has just finished a case in Istanbul and is returning home to London on board the luxurious Orient Express. The thrill of riding the famous train ends abruptly when a ruthless businessman is discovered dead.

Hercule Poirot has retired to a country village, until his neighbor is found murdered. Poirot reunites with his old partner, Chief Inspector Japp, to find the culprit, exposing a web of blackmail, envy, and murder.