( Hélène Joy ): Murdoch’s wife and fellow medical expert.
( Yannick Bisson ): Leads the investigation into the clown killings. Les EnquГЄtes de Murdoch S15E06 FRENCH HDTV
: While Murdoch handles the grim investigation, the rest of the team engages in seasonal festivities. Detective Watts participates in a pumpkin-carving contest at Station House No. 4, proving he is a much better detective than an artist. ( Hélène Joy ): Murdoch’s wife and fellow medical expert
Set in October 1909, the episode begins with a young woman, Irene Robbins, being stabbed to death by a clown while spending an evening with her boyfriend, Perry Balfour. Balfour survives, but his account of the attack conflicts with the autopsy findings of Coroner Violet Hart. As Murdoch delves into the mystery, he discovers that a similar "killer clown" had terrorized students at Jarvis Collegiate the previous Halloween, suggesting a vengeful motive. Detective Watts participates in a pumpkin-carving contest at
( Shanice Banton ): Provides critical forensic evidence that challenges the survivor's story. Legacy and Follow-up Review: Murdoch Mysteries 'I Know What You Did Last Autumn'
( Jonny Harris ): Assists Murdoch while dealing with seasonal antics.
: The episode title and plot are clear nods to the slasher film I Know What You Did Last Summer . It is part of the show's tradition of "spooky" holiday episodes, though unlike some previous entries, this one is largely considered canon-compliant.