Videos: Trailers, Teasers, Featurettes
The first season of It's Always Sunny in Philadelphia, premiered on FX on August 4, 2005. The season contains 7 episodes and concluded airing on September 15, 2005.
Streaming, rent, or buy It's Always Sunny in Philadelphia – Season 1:
Currently you are able to watch "It's Always Sunny in Philadelphia - Season 1" streaming on Netflix or buy it as download on Apple iTunes, Google Play Movies, Amazon Video, Microsoft Store.