Here's a shot of

Danny DeVito

in a hairpiece from the set of "It's Always Sunny in Philadelphia," when the FX comedy shot in Logan Square the other day. DeVito's looking up at

Rob McElhenney

, the South Philly raised co-creator of the show. The pair were shooting the episode "Dennis Reynolds: An Erotic Life," directed by

Fred Savage

. Below, the poncho-loving Savage directs McElhenney, also wearing a rug, and DeVito. The show's fourth season premieres in September.  Photos by

Christopher Gabello

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UPDATE:

Yeah dudes, it's the fourth season and has now been fixed above. Chill.