Watch It's Always Sunny in Philadelphia: Mac's Banging the Waitress Episode 404 Online

It's Always Sunny in Philadelphia: Mac's Banging the Waitress Episode 404, Summary: When Charlie asks Mac, his best friend, to beat up the waitress's new boyfriend, the only problem is that Mac is the guy. Dennis, in order to convince Charlie that he, and not Mac, is his best friend, tries to get Charlie to catch Mac red-handed.

This series will be aired on Monday on 14 February 2011 at 10:00 PM on Comedy Central.