Adam Ruins Christmas is the twenty-fifth episode of Season 1 of Adam Ruins Everything.
In this episode, Adam talks about Christmas's un-Christian origins, why gift giving makes no economic sense, and the true story of Santa Claus.
- Joel Waldfogel as Himself
- Adwin Brown as Mark
- Sasha A. Ali as Sasha
- Greg Butler as Krampus
- Mimi Davila as Gabriela
- Debi Derryberry as Priest / Puritan / Germanic Peanuts *Character
- Eduardo Franco as Gavis
- Zolee Griggs as Fallon
- Hayden Michael Cruz Haas as Young Adam
- Aaron LaPlante as KKK Santa
- Adam Lustick as Bernie Santa
- Dave Oberg as Cheapskate Station Owner
- Cristina Pucelli as Roman Peanuts Character / Pig
- Betsy Randle as Donna Rehm
- Sam Reich as Jimmy Stewart
- Nicole Roberts as Kendra
- Adam Savage as Himself
- Denny Siegel as Weird Hippie Aunt
- Ptolemy Slocum as Phil
- Toni Smith as Nancy Knight
- Lilly Mae Stewart as Young Rhea
- Mark Tate as St. Nick / Coke Santa
- Amanda Rae Troisi as Christmas Caroler
Ever Wonder Why Segments
- Ever Wonder Why ¨Its a Wonderful Life¨ Plays on TV Every Christmastime?
- Ever Wonder Why No Two Snowflakes Are Alike?