Duration: 22m

TV-MA 9.2 Comedy

It's Always Sunny in Philadelphia S6E13

Dennis and Dee teach Frank a lesson "A Christmas Carol"-style, while Mac and Charlie uncover shocking truths about their childhood Christmas traditions.

Release Date: December 9, 2010 (USA)

Creator: Rob McElhenney

Cast: Charlie Day, Rob McElhenney, Glenn Howerton, Kaitlin Olson, Danny DeVito, Mary Elizabeth Ellis, David Hornsby, Lindsey Kraft, Brenden Walsh