Lady Tressilian hosts a house party where Mary and Treves help to entertain the guests. Miss Marple is interested when Treves tells a story about a child murderer who was never convicted. The next day Treves turns up dead from an apparent heart attack. When Lady Tressilian turns up dead as well, Superintendent Mallard is brought in to investigate. He immediately suspects Audrey, but Miss Marple believes that explanation is too simple and starts an investigation of her own.
Episode 2. Nemesis
(AIR DATE 07/22/2007)
Miss Marple receives instructions from the recently deceased Mr. Rafiel asking her to investigate a possible crime. Unfortunately, the message doesn't tell her what the crime is. She goes on a mystery bus tour to gather clues.
Episode 3. At Bertram's Hotel
(AIR DATE 07/29/2007)
Miss Marple stays at Bertram's Hotel while some of her fellow guests read the will of Sir Richard Blake, a millionaire who disappeared seven years earlier. When two of the staff members are murdered, Miss Marple realizes that there is a darker truth at the hotel than she imagined.
Episode 4. Ordeal by Innocence
(AIR DATE 08/19/2007)
Miss Marple investigates when Jacko Argyle is convicted of murdering his adoptive mother and sent to the gallows. Jacko's family is surprised to learn that Jacko did have an alibi for the time of the murder.