Season
- Season 0 2007-09-04
- Season 1 2005-08-03
- Season 2 2006-06-28
- Season 3 2007-09-12
- Season 4 2008-09-17
- Season 5 2009-09-16
- Season 6 2010-09-15
- Season 7 2011-09-14
- Season 8 2012-10-09
- Season 9 2013-09-02
- Season 10 2015-01-12
- Season 11 2016-01-04
- Season 12 2017-01-03
- Season 13 2018-09-05
- Season 14 2019-09-25
- Season 15 2021-11-30
- Season 16 2023-06-06
- Season 17 2025-07-09
Season 17 Episode
- Season 4 Mac and Dennis: Manhunters
- Season 4 The Gang Solves the Gas Crisis
- Season 4 America’s Next Top Paddy’s Billboard Model Contest
- Season 4 Mac’s Banging the Waitress
- Season 4 Mac and Charlie Die (1)
- Season 4 Mac and Charlie Die (2)
- Season 4 Who Pooped the Bed?
- Season 4 Paddy’s Pub: The Worst Bar in Philadelphia
- Season 4 Dennis Reynolds: An Erotic Life
- Season 4 Sweet Dee Has a Heart Attack
- Season 4 The Gang Cracks the Liberty Bell
- Season 4 The Gang Gets Extreme: Home Makeover Edition
- Season 4 The Nightman Cometh
It's Always Sunny in Philadelphia - Season 4
8.28 48 minutes Four egocentric friends run a neighborhood Irish pub in Philadelphia and try to find their way through the adult world of work and relationships. Unfortunately, their warped views and precarious judgments often lead them to trouble, creating a myriad of uncomfortable situations that usually only get worse before they get better.
