Something happens to TV every December, and it’s not just the sudden appearance of decorative mugs and fake snow. Shows that normally thrive on sarcasm, chaos, or existential dread suddenly lean into joy, nostalgia, and questionable sweaters. Characters who can barely stand each other unite for tree-trimming, gift-giving, or attempts at reinventing the holiday altogether. These Christmas episodes don’t just fill airtime—they become comfort food, traditions, and in some cases cultural landmarks. Here are 22 of the greatest holiday episodes ever to air, each one doing its part to keep the season merry, bright, and occasionally unhinged.