We’ve got a month to go till Sept. 13’s third-season return of “It’s Always Sunny in Philadelphia,” but FX is revving up the promo machine for its cockeyed barroom comedy.
Already online is the very funny third-season episode “Mac Is a Serial Killer,” streaming on the series’ MySpace page through Thursday, Aug. 23. Meanwhile, a DVD set pairing Seasons 1-2 hits shelves Sept. 4 from Fox Home Entertainment.
“Sunny in Philly” has 15 new episodes due this season, with two episodes premiering each Thursday at 10 and 10:30 p.m. for the season’s first five weeks (and one weekly thereafter). Misbehaving dad Danny DeVito is back on board, too.

