As each holiday season approaches, it brings with it a collection of yuletide-themed episodes from various animated TV shows, some of which delve into the darkest corners of their respective series. Whether created for shock value as a counterbalance to the overly saccharine sentiments associated with holiday specials or designed to spotlight pressing issues, the "hap-happiest season of all" can also be among the most grim. Despite how uncomfortable some holiday cartoons make audiences feel and the gloom they sometimes leave behind, they serve a purpose. Dark holiday episodes aim to make the holidays shine a little brighter, if not for those with a macabre sense of humor, then for others in need of compassion.
Source：https://www.cbr.com/darkest-holiday-cartoon-episodes/
