Mark Salling Not Appearing in Next Episodes!

Question: Where is Mark Salling? Is he gone permanently? Is it due to his release of a non-Glee album? You have to know something about this, right?! —Missy
Ausiello: Puck up, Missy! Though I dunno whether his absence is a side effect of his decision work on music that isn’t in the genre of R&Glee, I do know that it’s only temporary. He’ll miss one more episode—the Oct. 26 Rocky Horror Picture Show tribute—but will be back on air in a big way in early November.

source: ausiellofiles.ew.com