The Addams Family S02 E15 Christmas with the Addams Family

"When we’re together, every night is Halloween."

Uncle Fester is chosen to slide down the chimney dressed as Santa Claus to prove the existence of St. Nick to the children. Fester gets stuck in the chimney, so Gomez, Lurch, Cousin Itt, and even Morticia and Grandmama each don a red suit and appear to the children.