It's Always Sunny in Philadelphia (2005– )

Mac and Dennis: Manhunters

Mac and Dennis pursue the ultimate high of hunting another man by stalking Rickety Cricket, while Dee and Charlie become obsessed with eating human flesh after they come to believe Frank has fed some of it to them.

Director: Fred Savage

Writers: Rob McElhenney (developer), Glenn Howerton (developer) | 4 more credits »

Stars: Charlie Day, Glenn Howerton, Rob McElhenney | See full cast & crew »

https://www.imdb.com/title/tt1265811/

I think it's the only episode I ever watched.