The Gang’s in Dublin! Dennis longs for a charming, authentic European experience, but ends up helping Frank with some of his business’s “dirty work.” Mac and Charlie learn about their Irish heritage. Dee rushes to the set of an Irish soap opera, where she will play the role of “Obnoxious American MILF.”

Dennis and Dee explore their new accommodations in the countryside; Frank accompanies Charlie to find the truth about Charlie’s Irish childhood pen pal; Mac has an identity crisis and decides to join the seminary.

Jimmy reads his favorite tweets with the hashtag #AddAWordRuinAChristmasSong, then catches up with Penélope Cruz and Kid Cudi before enjoying a technology demonstration from Joanna Stern.