"The Jewel Robbery at the Grand Metropolitan." Teenager Mabel West observes Belgian detective Hercule Poirot as he investigates a robbery at a luxury hotel.

"The Adventure of the Cheap Flat." While searching for lodging, Mabel stumbles into a mystery that interests Poirot.

"Strange Jest." Mabel helps her great-aunt Jane Marple search for a missing inheritance.

"The Case of the Perfect Maid." Mabel's great-aunt Marple tries to prove the innocence of a parlormaid accused of stealing.

"The ABC Murders, Part 1: A Written Challenge to Poirot." An anonymous letter challenges Poirot to solve a mystery that will occur later that month.

"The ABC Murders, Part 2: B's the Place, B's the Name of the Person." Poirot, Hastings, Mabel, and police Inspector Sharpe continue the investigation.

"The ABC Murders, Part 3: The Culprit Appears." Poirot discovers a previously overlooked clue that links the cases together.

"The ABC Murders, Part 4: Poirot Solves the Mystery." Poirot and his team catch the ABC serial-killer.

"The Kidnapped Prime Minister, Part 1: Pursuit in the Dover Strait." Poirot is called away on a top secret case.

"The Kidnapped Prime Minister, Part 2: The Truth is in England." Poirot and his team embark on a perilous journey.

"The Adventure of the Egyptian Tomb, Part 1: A Written Challenge from Ancient Times." Poirot and his team investigate mysterious deaths linked to a curse.

"The Adventure of the Egyptian Tomb, Part 2: The Curse of Pharoah Men-her-Ra." Poirot, Hastings, and Mabel search for a murderer on an archaeological dig.

"The Tape-Measure Murder." Miss Marple and her niece Mabel investigate a strangulation in St. Mary Mead.

"Ingots of Gold." Miss Marple tells the story of a mysterious incident involving Mabel's father, Raymond West.

"The Blue Geranium." Miss Marple and Mabel investigate a fortuneteller's warning.

"Peril at End House, Part 1: The Night of the Party." While Mabel, Poirot, and Hastings are holidaying, they meet an heiress whose life is in danger.

"Peril at End House, Part 2: Concealed Love." Poirot finds a link between a famous pilot's recent disappearance and the crimes at End House.

"Peril at End House, Part 3: Irrefutable Evidence." After a shocking tragedy, Poirot and his detective team gather the suspects for questioning.

"The Adventure of the Christmas Pudding, Part 1: A Commission from a Prince." Poirot and his team are sent to investigate a mystery at a Christmas party.

"The Adventure of the Christmas Pudding, Part 2: The Royal Family's Ruby." All the pieces of the puzzle come together and Poirot finds a satisfactory solution.

"4.50 From Paddington, Part 1: The Train a Murderer Rides." Great-aunt Marple's friend Elspeth McGillicuddy witnesses a murder on a train.

"4.50 From Paddington, Part 2: The Creeping Shadow." While working undercover, Mabel discovers a dead body hidden at Rutherford Hall.

"4.50 From Paddington, Part 3: A Simple Motive." The killer strikes again at Rutherford Hall.

"4.50 From Paddington, Part 4: Marple vs. the Culprit." Miss Marple invites Mrs. McGillicuddy to Rutherford Hall, where the killer is identified.

"The Plymouth Express, Part 1: A Body in a Carriage." The dead body of a woman is found underneath a train seat, and Poirot is hired to solve the mystery.

"The Plymouth Express, Part 2: The Blue Dress." Mabel and Inspector Sharpe visit the scene of the crime; Poirot puts the clues together.

"Motive versus Opportunity." Marple and Mabel hear of a curious crime where those with motive had no opportunity, yet those with opportunity had no motive.

"The Adventure of the Clapham Cook, Part 1: An Aggressive Request." Poirot is hired to finding a missing cook.

"The Adventure of the Clapham Cook, Part 2: The Secret of the Trunk." The missing cook is located and Poirot uncovers a sinister plot.

"Sleeping Murder, Part 1: Sleeping Murder Incident." Gwenda tells Miss Marple and Mabel that she has had strange premonitions concerning her new house.

"Sleeping Murder, Part 2: The Door of Memory." Miss Marple and Mabel assist Gwenda in investigating her stepmother who disappeared 18 years earlier.

"Sleeping Murder, Part 3: What Helen Loved." Miss Marple, Mabel, and Gwenda investigate three men who may have been romantically linked to Helen.

"Sleeping Murder, Part 4: The Evil Outstretched Hand." Gwenda's life is in danger when she realizes the truth about her stepmother.

"Four-and-Twenty Blackbirds." Poirot investigates the death of a reclusive man whose eating habits provide a clue.

"The Disappearance of Mr. Davenheim" Poirot wagers that he can solve the case of a missing financier without leaving his office.

"Death in the Clouds, Part 1: The Flying Locked Room." While Poirot sleeps on an airplane flight from Paris to London, a passenger dies.

Death in the Clouds (Part 2): "Madame Giselle Paris": Poirot, Mabel, Hasting and the Inspector Sharpe return to Paris. During the flight Poirot studied the positions of the occupants and their movements during the flight killer. In Paris they discover that someone arranged for Madame Giselle was on that flight from Paris. All his fortune will be left to her only daugh...

Death in the Clouds (Part 3): "A Threat to Mrs. Horbury.": All turn out to meet following the "Writer", Mr. Clancy. Poirot asks that Mr. Gale simulate a extortion with Ms. Horbury. Mabel, Poirot and Miss Jane Gray travel again to Paris to unravel the mystery. Mr. Dupont accepts the hint of Poirot to take Miss Jane Gray in his next excavation in Persia. The only daught...

Death in the Clouds (Part 4): "The Heiress of Immense Fortune": After remember that there was already found the daughter of Madame Giselle in flight she was dead, Poirot realizes that she is in great risk of dying, but Mabel he had already left to accompany her to the Grand Hotel and realizes then that she was passing in a taxi with a man going the nearest train stati...