Sunny In Philadelphia Season 6: It's Always

The Gang tries to replace Dee with a new friend named Schmitty . The Gang debuts their fan film, Lethal Weapon 5 . Charlie Kelly: King of the Rats

Mac wins a radio contest to shoot a goal at a Flyers game . The duo tries to fix an abandoned pool during a heatwave . Mac's Mom Burns Her House Down Mac and Charlie's moms become roommates . Who Got Dee Pregnant?

: A major through-line involves Dee's mysterious pregnancy (written to accommodate Kaitlin Olson's real-life pregnancy) . The season culminates in the Gang trying to identify the father through a house party for her former flings in "Dee Gives Birth" . It's Always Sunny in Philadelphia Season 6

: The season opens with Mac fighting against gay marriage and Dennis getting a quick marriage—and even quicker divorce—from his high school sweetheart, Maureen Ponderosa .

Season 6 consists of 14 episodes, including a double-length Christmas special . Episode Title Key Plot Point The Gang tries to replace Dee with a

The sixth season of It's Always Sunny in Philadelphia premiered on September 16, 2010, on FX . It marked a major technical shift for the series as the first season to be shot in high-definition (HD) .

Mac tries to prevent The Waitress from marrying a former classmate . The duo tries to fix an abandoned pool during a heatwave

The season follows the Gang through a series of increasingly absurd personal and financial "milestones":