Episode 33 of "How I Met Your Mother"
s02e11 How Lily Stole Christmas
Title: How Lily Stole Christmas
Original Air Date: 12/11/2006 on CBS
Plot Outline:
Nobody likes a "grinch," so the Christmas-stealing Lily must be stopped after she threatens to ruin the gang's plans of a joyous holiday together due to a brawl with Ted. As hopes of a beautiful Christmas together with friends slip away, Ted must figure out how to make amends with Lily before Marshall arrives home to see that his "grinch-of-a-fiance" really has stolen Christmas.