Evelyn Howard is the secondary antagonist of Agatha Christie 1920 novel, The Mysterious Affair at Styles, which was her first published novel and the debut of Hercule Poirot. She is the lover and accomplice of Alfred Inglethorp, assisting him to murder her companion, Emily Inglethorp, and frame John Cavendish. Originally, she was shown as a firm detractor of Alfred, but their relationship was revealed in the plot twist.

She was portrayed by Joanna McCallum in the 1990 television film adaptation from Agatha Christie's Poirot, and was voiced by Nichola McAuliffe in the 2005 radio adaptation of BBC 4 Radio.


Ms. Evelyn Howard was the companion of Emily Inglethrop, the owner of Styles, and was apparently showing disgust and objection towards Emily's husband Alfred. However, it was revealed that Evelyn was Alfred's lover in secret and planned to poison Emily in order to take over her fortune.

After Emily discovered that her eldest stepson, John Cavendish, had a love affair, she began a fiery arguement with him and changed her will. However, she later discovered that Alfred had a love affair with Evelyn as well and was distressed at night, learning of their attention. Unknown to her, however, that the pair already added bromide to Emily's regular sleeping medicine, which contained strychnine. The bromide made the dose of sleeping powder lethal, killing Emily later.

Afterwards, Evelyn forged John's handwriting and framed him for the crime as well as the person who obtained the poison. Meanwhile, Alfred intentionally had himself into the custody in order to throw away suspicions. However, his intention of hiding the letter between him and Evelyn failed after Poirot discovered the said letter after a remark from Hastings, solving the case.


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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