Rules of Engagement Season 5 Episode 10 (Rules of Engagement s05e10) with title “Fun Run” aired on Monday, November 22st 2010 at 08:30 pm via CBS Network.
Here is summary for Rules of Engagement Season 5 Episode 10 :

Jeff has trouble asking people to donate to the 10k run Audrey to will be in for charity Jeff made the mistake of telling people and that he didn't want to be a part of fundraisers anymore.

A girl Russell recently dated decides to turn the tables on him and give him a taste of his own medicine.