[s9e1] Five Little Pigs < RECOMMENDED >

: Still feeling guilty for disfiguring Angela years ago, Caroline deliberately staged the scene to look like a suicide and went to the gallows without a fight to "pay her debt" and protect her sister from a crime she didn't commit.

: Elsa Greer killed Amyas. She overheard him tell Caroline that the affair meant nothing and that he intended to send Elsa away as soon as the painting was finished. Spurned and vengeful, Elsa poisoned his beer.

Fourteen years before the main story, Amyas Crale was found dead at his estate, Alderbury, poisoned by . At the time, he was having a flaunted affair with his young model, Elsa Greer . Because Caroline had discovered the affair and allegedly stolen the poison from her neighbor's lab, she was convicted and hanged for the crime. Before her execution, she wrote a letter to Lucy claiming her innocence. The "Five Little Pigs" (The Suspects) [S9E1] Five Little Pigs

Poirot investigates by interviewing the five other people present on the day of the murder:

: A stockbroker and Amyas’s best friend. In the TV adaptation, he was secretly in love with Amyas. : Still feeling guilty for disfiguring Angela years

Through his psychological analysis of their testimonies, Poirot discovers a heartbreaking truth:

: The devoted governess who witnessed Caroline's behavior at the scene. Spurned and vengeful, Elsa poisoned his beer

: Caroline’s younger half-sister, whom Caroline had accidentally disfigured as a child. The Twist Ending