Season 10 of It’s Always Sunny in Philadelphia premiered 2015-01-14 and ran 10 episodes through 2015-03-18.
It’s Always Sunny in Philadelphia — Season 9
Season 9 of It’s Always Sunny in Philadelphia premiered 2013-09-04 and ran 10 episodes through 2013-11-06.
It’s Always Sunny in Philadelphia — Season 8
Season 8 of It’s Always Sunny in Philadelphia premiered 2012-10-11 and ran 10 episodes through 2012-12-20.
It’s Always Sunny in Philadelphia — Season 7
Season 7 of It’s Always Sunny in Philadelphia premiered 2011-09-15 and ran 13 episodes through 2011-12-15.
It’s Always Sunny in Philadelphia — Season 6
Season 6 of It’s Always Sunny in Philadelphia premiered 2010-09-16 and ran 13 episodes through 2010-12-16.
It’s Always Sunny in Philadelphia — Season 5
Season 5 of It’s Always Sunny in Philadelphia premiered 2009-09-17 and ran 12 episodes through 2009-12-10.
It’s Always Sunny in Philadelphia — Season 4
Season 4 of It’s Always Sunny in Philadelphia premiered 2008-09-18 and ran 13 episodes through 2008-11-20.
It’s Always Sunny in Philadelphia — Season 3
Season 3 of It’s Always Sunny in Philadelphia premiered 2007-09-13 and ran 15 episodes through 2007-11-15.
It’s Always Sunny in Philadelphia — Season 2
Season 2 of It’s Always Sunny in Philadelphia premiered 2006-06-29 and ran 10 episodes through 2006-08-17.
It’s Always Sunny in Philadelphia — Season 1
Season 1 of It’s Always Sunny in Philadelphia premiered 2005-08-04 and ran 7 episodes through 2005-09-13.