If "It's a Very Sunny Christmas" taught us anything, it's that some traditions are meant to be broken. While Mac (Rob McElhenney) realizes his family's practice of sneaking into the neighbors' house Christmas morning to open presents was actually stealing, Charlie (Charlie Day) realizes that the Santa Clauses coming over to his house were actually sleeping with his mom. Meanwhile, Dennis (Glenn Howerton) and Dee (Kaitlin Olson) want to teach Frank (Danny DeVito) a lesson so he'll to stop buying everything on their wish lists for himself. Sometimes change is a good thing.
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