It's always sunny in philadelphia season 5 aired on September 17, 2009.

Type : American television sitcom
Air Date : September 17, 2009
Title : "The Gang Exploits the Mortgage Crisis."
Created by : Rob McElhenney

Developed by :

• Rob McElhenney
• Glenn Howerton

Starring Cast :

• Charlie Day
  
• Glenn Howerton
  
• Rob McElhenney
  
• Kaitlin Olson
  
• Danny DeVito

It's Always Sunny In Philadelphia Season 5 Synopsis :

It's Always Sunny in Philadelphia revolves around four friends who run a bar in the City of Brotherly Love and have to overcome their relentless self-involvement to make their friendship and business work.

It's Always Sunny In Philadelphia Season 5 Video (YouTube)