Fox Home Entertainment has announced the fourth season of Its Always Sunny In Philadelphia which stars Charlie Day, Glenn Howerton, Rob McElhenney, and Danny DeVito. The 3-disc package will be available beginning September 15, 2009. According to TVShowsOnDVD.com, extras will include two featurettes (“The Nightman Cometh Live!”, “Dennis Reynolds: An Erotic Life”), a season 4 blooper reel, and at least one hidden Easter egg.
Source: 20th Century FOX Home Entertainment