It's Always Sunny in Philadelphia: Season 2, Episode 5

2 - 5: Hundred Dollar Baby

After she's mugged, Dee takes boxing lessons from ex-pug Frank, who runs into an old nemesis (Eddie Mekka) at the gym. Meanwhile, Mac and Dennis enter Charlie in an underground street-fight match with hopes of making some money. And both Dee and Charlie need help, which they find in a pill bottle.