After receiving threatening letters, an aristocrat is robbed of her famed diamond in front of Poirot's eyes.

When the prime minister is kidnapped right before an important international arms summit, Poirot has just 32--and a quarter--hours to find the prime minister.

When U.S. Navy plans for a new submarine are stolen and the thief tracked to London, the FBI sends an agent to work with Inspector Japp to recover them.

A young woman is delivering a set of antique Napoleon miniatures to an American collector when they are stolen from her suitcase. Captain Hastings, under Poirot's guidance, sets out to find the thief.

Poirot wagers Chief Inspector Japp that he can solve the mystery of a missing banker without leaving his flat.

Alice Pengelley visits Poirot in London, telling him she thinks she is being poisoned by her husband. When Poirot arrives in Cornwall the next day to investigate Mrs. Pengelley's charges, he is too late, and finds her dead.

When a Chinese businessman with a map to a long lost silver mine is found dead in Chinatown, Poirot must find the map and killer.

Poirot becomes a criminal himself when he agrees to help a beautiful woman recover a letter written in her youth that is being used to blackmail her.

While Poirot is staying at an exclusive Cornish resort, he meets a beautiful heiress whose life is in danger.