: 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.

(Murdoch Mysteries) Season 15, Episode 6, titled " I Know What You Did Last Autumn ," is a stylized Halloween special that originally aired on October 25, 2021. In this episode, Detective William Murdoch investigates a series of murders involving a killer dressed as a clown who is terrorizing young couples in Toronto. Plot Summary

( Hélène Joy ): Murdoch’s wife and fellow medical expert.

( Thomas Craig ): Oversees the station during the holiday chaos.