Watch Season Four Episodes:
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Charlie and Dee freak out when they eat what they think is human meat. Mac and Dennis take up hunting and go after the most dangerous prey of all -- man.

To profit from high gas prices, Mac, Dennis, and Charlie fill barrels of gasoline and sell them door-to-door. Dee and Frank plot to brand Bruce Mathis a terrorist.

Mac and Frank hold a contest where the winner will be the billboard model for Paddy's. Charlie and Dee set out to create a viral video.

When Charlie learns that The Waitress has a boyfriend, he enlists Mac's help in catching the guy so Charlie can beat him up. Trouble is, Mac is the one who's dating the waitress.

Mac's revenge-obsessed father is released from prison and Mac and Charlie fake their deaths to save their lives. Frank and Dennis discover a glory hole in the bathroom.

Mac and Charlie continue their misadventures in avoiding Luther Mac. Dennis and Frank investigate the world of anonymous sex.

Frank and Charlie find that someone has defecated in their bed and hunt for the culprit. Meanwhile, Dee leads a "Sex and the City" style night on the town.

The gang kidnaps a newspaper critic who dubbed Paddy's Pub "the worst bar in Philadelphia".

Dennis plans on publishing an account of his sexual exploits and ends up in a rehab facility. Charlie and Dee try on each other's lives for size.

After Dee is hospitalized for a heart attack, she and Dennis try to adopt a healthier lifestyle. Charlie and Mac become office workers to get on-the-job health insurance.

In an attempt to turn their bar into a Philadelphia landmark, the gang tells the story of how Paddy's Pub was historically relevant during the Revolutionary War.

The gang redecorates a poor family's home a la Extreme Makeover: Home Edition.

Charlie stages a rock opera based on his song "The Nightman," and recruits the rest of the gang to help him with it.