TV It's Always Sunny in Philadelphia - Season 5 Episode 9 : Mac and Dennis Break Up It's Always Sunny in Philadelphia - Season 5 Episode 9 : Mac and Dennis Break Up 8.282/10 by 1193 users Mac and Dennis decide that they need to spend some time away from each other. Meanwhile, Charlie helps Dee search for her cat. Details Casts Posters Images Title It's Always Sunny in Philadelphia - Season 5 Episode 9 : Mac and Dennis Break Up Alternative Titles 酒吧五杰, It’s Always Sunny, Always Sunny, FX's Sunny First Air Date 2005-08-04 Last Air Date 2025-08-13 Number of Episodes 177 Number of Seasons 17 Genres Comedy, Networks FX, FXX, Casts Charlie Day, Glenn Howerton, Rob Mac, Kaitlin Olson, Danny DeVito Plot Keywords , Charlie Kelly Charlie Day Dennis Reynolds Glenn Howerton Ronald 'Mac' McDonald Rob Mac Deandra 'Dee' Reynolds Kaitlin Olson Frank Reynolds Danny DeVito Episodes List It's Always Sunny in Philadelphia Season 5 :Episode 1 The Gang Exploits the Mortgage Crisis The Gang Exploits the Mortgage Crisis 2009-09-17 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 2 The Gang Hits the Road The Gang Hits the Road 2009-09-24 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 3 The Great Recession The Great Recession 2009-10-01 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 4 The Gang Gives Frank an Intervention The Gang Gives Frank an Intervention 2009-10-08 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 5 The Waitress Is Getting Married The Waitress Is Getting Married 2009-10-15 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 6 The World Series Defense The World Series Defense 2009-10-22 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 7 The Gang Wrestles for the Troops The Gang Wrestles for the Troops 2009-10-29 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 8 Paddy's Pub: Home of the Original Kitten Mittens Paddy's Pub: Home of the Original Kitten Mittens 2009-11-05 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 9 Mac and Dennis Break Up Mac and Dennis Break Up 2009-11-12 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 10 The D.E.N.N.I.S. System The D.E.N.N.I.S. System 2009-11-19 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 11 Mac and Charlie Write a Movie Mac and Charlie Write a Movie 2009-12-03 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships.... It's Always Sunny in Philadelphia Season 5 :Episode 12 The Gang Reignites the Rivalry The Gang Reignites the Rivalry 2009-12-10 Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships....