Marthe Daubreuil is the main antagonist of Agatha Christie's 1932 Hercule Poirot novel, The Murder on the Links. She is Madame Daubreuil's equally manipulative and cunning daughter, who wants to marry Jack Renauld, unaware he is also in love with Bella Duveen.

In the climax of the story, however, she is revealed to be the killer of Paul Renauld, and she only wants to marry Jack so that she can obtain his father's fortune.

She was voiced by Francesca Buller in the 1990 radio adaptation produced by BBC Radio 4, and by Sophie Linfield in the 1996 television film adaptation from Agatha Christie's Poirot.


Marthe was only nine years old when her mother murdered her father with the assistance of Paul Renauld. Growing up, Marthe had inherited her mother's manipulative and cunning side. After discovering Paul Renauld as her neighbor, Marthe began to get closer to Paul's son, Jack, and began to date him. Her true purpose was to take over Renauld's family fortune through her marriage with Jack, and their relationship had worried Renauld and his wife.

One day, Marthe overheard Renauld's plan to fake his kidnapping and death in order to escape from Madame Daubreuil. At night, she followed Renauld out and found him digging grave for the corpse of a tramp, who died in his garden by accident. She stabbed Renauld dead and pushed his corpse into the hole.

After Jack was threw into prison for suspicion over killing his father, Bella Duveen who was in love with him had falsely took the blame of killing Renauld. However, Poirot revealed that Marthe was the real killer based on the information he had gathered during the investigation. Together, he and Eloise Renauld staged up a ploy to expose Marthe as the culprit.

Following Poirot's strategy, Eloise pretended to openly disinherit Jack, who left her alone in the villa (under Poirot's arrangement), giving Marthe a chance to attack Eloise at the night in order to gain the fortne once and for all. However, Marthe was killed by Dulcie Duveen (Bella's twin sister, and later the wife of Arthur Hastings) in time, saving Eloise's life and exposing the truth.


  • In Agatha Christie's Poirot, before attacking Eloise, Marthe was stopped by Poirot and Hastings, and was killed by Eloise's secretary. The character Dulcie was merged with her sister into a single character, with Bella married Hastings in the endings instead of Dulcie. In the original novel, Bella married Jack, and Dulcie married Hastings.


Agatha Christie's Poirot (title card).png Villains

Alfred Inglethorp | Alistair Ravenscroft | Ann Shapland | Anne Meredith | Bella Tanios | Claude Darrell | David Hunter | Dorothea Jarrow | Dr. Geoffrey Roberts | Dr. James Sheppard | Elsa Greer | Evelyn Howard | Franklin Clarke | Gerda Christow | Jacqueline de Bellefort | Jane Wilkinson | Jessie Hopkins | Lady Westholme | Lanfranco Cassetti | Marthe Daubreuil | Martin Alistair Blunt | Michael Garfield | Miss Chadwick | Miss Gilchrist | Nick Buckley | Nigel Chapman | Norman Gale | Patrick Redfern | Rowena Drake | Simon Doyle | Sir Charles Cartwright | Stephen Norton | Superintendent Sugden
Short Stories
Marrascaud | Nurse Harris | Roger Havering | Zoe Havering

Villainous Victims
Abandoned Accomplices
Anne Morisot | Carlotta Adams | Eileen Corrigan | Leslie Ferrier
Lady Boynton | Lord Edgware | Simeon Lee
Angèle Blanche | Charles Trenton | Henry Reedburn | Leopold Reynolds | Louise Bourget | Madame Giselle
Lanfranco Cassetti | Mrs. Lorrimer | Paul Déroulard | Stephen Norton
John Christow | Linnet Doyle | Mrs. Clapperton | Paul Renauld | Sir Reuben Astwell

Accomplices & Others
Alice Cunningham | Anne Morisot | Big Four | Carlotta Adams | Christine Redfern | Countess Vera Rosakoff | The Crofts | Eileen Corrigan | Frances Cloade | Freddie Rice's husband | George Challenger | Henrietta Savernake | Leslie Ferrier | Madame Daubreuil | Miss Van Schuyler | Rowley Cloade

Sophie Hannah's Continuations
The Monogram Murders (2014): Jennie Hobbs | Nancy Ducane | Samuel Kidd

Adaptational, Homage & Non-Canonical
Agatha Christie's Poirot: Grace Springer | Harrington Pace | Marie McDermott | Sister Agnieszka |

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