864 : The Spirit Detective's Murder (part 2) -

: While Conan and Masumi Sera identify the killer, Conan loses his Voice-Changing Bow Tie during the investigation. In a rare occurrence, Mary Sera (the "Sister from Outside the Domain") finds the bow tie and uses it to complete the deduction while Conan is incapacitated. Major Plot Developments

: The episode provides major clues about Mary’s intelligence and her condition, showing her skillfully using Conan's gadgets. 864 : The Spirit Detective's Murder (Part 2)

: Kogoro Mouri and Conan Edogawa witness a suspect fleeing the room through a window. The culprit used a trick involving salt to facilitate the crime or their escape. : While Conan and Masumi Sera identify the

This episode is significant for its progress on the overarching "Rum" arc of the series: 864 : The Spirit Detective's Murder (Part 2)