- FX: It's Always Sunny in Philadelphia - Official network site. Cast details, episode videos, message board, wallpapers, screensaver, widgets, and show weblog written by the cast.
- IMDb: It's Always Sunny in Philadelphia - Show synopsis, cast details, episode list, episode videos, user reviews, quotes, message board, and production information.
Media publications
- Chicago Tribune: It's So Wrong, But It's Also Funny - The Tribune's Maureen Ryan cites the show's inventiveness and improvements from the first few seasons in her positive review. (Published 2008-09-16 00:00:00)
