| United States|
| September 4 (2013-09-04) – November 6, 2013 (2013-11-06)|
The ninth season of the American comedy television series It's Always Sunny in Philadelphia premiered on the new channel FXX on September 4, 2013. The season consists of 10 episodes, and concluded airing on November 6, 2013. The ninth season was released on DVD in region 1 on September 2, 2014.
Charlie Day as Charlie Kelly
Glenn Howerton as Dennis Reynolds
Rob McElhenney as Mac
Kaitlin Olson as Dee Reynolds
Danny DeVito as Frank Reynolds
Seann William Scott as Country Mac
Mary Elizabeth Ellis as The Waitress
David Hornsby as Cricket
Ken Davitian as Snyder
Peter Jacobson as Rotenberg
Robyn Lively as Kerry
Dave Foley as Principal MacIntyre
Jeff Kober as Creepy Guy
Oscar Nunez as Sudz Manager
Chad L. Coleman as Z
Artemis Pebdani as Artemis
Tommy Dewey as Harris Marder
Roddy Piper as Da' Maniac
Josh Groban as Himself
Jessica Collins as Jackie Denardo
Jim O'Heir as Doctor
Jimmy Ouyang as Tang-See
Burn Gorman as Scientist
Jimmi Simpson as Liam McPoyle
Mary Lynn Rajskub as Gail the Snail
Zachary Knighton as Random Guy
Lance Barber as Bill Ponderosa
It's Always Sunny in Philadelphia (season 9) Wikipedia
On August 6, 2011, FX announced it had picked up the show for a ninth season. It premiered on the new FXX channel and moved timeslots to Wednesday nights.
Rob McElhenney revealed on May 14, 2013, that Game of Thrones series creators David Benioff and D. B. Weiss wrote an episode of the ninth season. Charlie Day revealed it would be a Flowers for Algernon type of story about "Charlie getting smarter" in a Limitless style, and is called "Flowers for Charlie".
In addition, there is an episode called "The Gang Tries Desperately to Win an Award", which mocks the show's lack of Emmy or other award nominations, a Lethal Weapon 6 episode follow-up, and a Thanksgiving special, which brings back Gail the Snail, The McPoyles and other enemies of the Gang. An animated sequence (inspired by a Pixar animation) was created for the 100th episode, "The Gang Saves the Day".
An Aaron Paul cameo was announced, but he was not able to appear due to scheduling conflicts.
Rob McElhenney revealed at the 2013 San Diego Comic-Con that he had written an episode for this season involving the gang becoming contestants on the game show Family Feud. While Family Feud producers were receptive to the storyline, FX refused to allow the episode to proceed to production.
The season premiered on September 4, 2013, and contains 10 episodes. The series' landmark 100th episode aired on October 9.
The first episode of the season premiered with the lowest number of U.S. viewers since it has been tracked for the show. This was primarily due to the new channel, FXX, being unavailable from many television providers. Many Suddenlink Communications franchises, although carrying the channel, have required the subscriber to buy a "Sports Package" in order to receive the network. Nonetheless, FX Network president John Landgraf said that "the numbers last night [...] far exceeded our highest expectations" and that "To have just launched the channel three days ago and get these ratings is thrilling."