Merry Christmas Mordecai Margaret returns to town for Eileen's Christmas party, which complicates things for Mordecai now that he is with C.J. -- and things get worse when Mordecai breaks C.J.'s heart. Details Casts Videos Galleries Posters Season Lists Title Merry Christmas Mordecai Genres Animation Comedy Release Date 2014-12-04 Episode Runtime 00 Hours 11 Minutes Season Number 6 Episode Number 12 Production Companies Cartoon Network Studios J.G. Quintel... Mordecai / Hi Five Ghost ... William Salyers... Rigby (voice)... Mark Hamill... Skips (voice)... Sam Marin... Benson / Pops / Muscle Ma... Regular Look at Regular Show (Clip) Original Size (1920x1080) Original Size (1280x720) Original Size (3840x2160) Original Size (1920x1080) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (1600x900) Original Size (1280x720) Original Size (1920x1080) Original Size (2973x1673) Original Size (1920x1080) Original Size (1920x1080) Original Size (1920x1080) Original Size (1920x1080) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (1920x1080) Original Size (1920x1080) Original Size (1000x1500) Original Size (2000x3000) Original Size (1000x1521) Original Size (2000x3000) Original Size (2000x3000) Original Size (2000x3000) Original Size (2000x3000) Original Size (1708x2562) Original Size (680x1000) Original Size (641x938) Original Size (2000x3000) Original Size (960x1440) Original Size (1708x2562) Original Size (667x1000) Original Size (1000x1500) Original Size (552x827) Original Size (680x1000) Original Size (832x1280) Original Size (600x900) Original Size (1200x1800) Original Size (2000x3000) Original Size (1708x2562) Original Size (1708x2562) Original Size (1856x2644) Original Size (667x1000) Original Size (2000x3000) Original Size (1200x1800) Original Size (720x1080) Original Size (720x1080) Season 1 12 Episode(s) 2010-09-06 Season 2 28 Episode(s) 2010-11-28 Season 3 39 Episode(s) 2011-09-19 Season 4 40 Episode(s) 2012-10-01 Season 5 40 Episode(s) 2013-09-02 Season 6 31 Episode(s) 2014-10-09 Season 7 36 Episode(s) 2015-06-26 Season 8 31 Episode(s) 2016-09-26