Geeks and Gleeks, prick up your ears: before this 2009/2010 season ends TV mastermind, and personal hero, Joss Whedon will lay his genius on phenom frosh series Glee. Whedonites, be not afraid, this does not mean he’s jumping his current ship Dollhouse (even though there are rumblings of said ship to be on the verge of sinking) he will merely be moonlighting as director for one episode of his fellow FOX show.

Those in the know, including Glee helmer Ryan Murphy, have already seen the Buffy creator exquisitely execute a musical slant to the Slayer series’ with its season six (“All singing! All talking!”) episode “Once More With Feeling,” which he directed and wrote both music and lyrics. Murphy gushed, “Joss directed one of the great musical episodes in the history of television on Buffy, so this is a great, if unexpected, fit. I’m thrilled he’ll be loaning us his fantastic groundbreaking talent.” Most recently, the benevolent Whedon bestowed upon the world the online musical sensation Dr. Horrible’s Sing-Along Blog, which garnered him a win this year in the Emmy’s newest category, Short-Form Live-Action Entertainment Program.

Joss is also no stranger to guest-directing hit shows. He ably helmed The Office episode “Business School” in its third season and says the man himself, “A television director’s job is, on some level, to be anonymous; to find the most compelling way to present a story without calling attention to himself. I had a wonderful time doing just that on The Office, and hope to again. A guest director can bring a huge amount to the party (we’ve had CRAZY talent on Dollhouse), but the party isn’t his. I just want to work with good people on a show that I like enough to have watched every episode several times.”

In other Glee guest talent news, lead Lea Michele will soon be reunited with her “Spring Awakening” co-star Jonathan Groff. The Broadway star will reportedly be on the show for about five or six episodes as the lead male singer of rival show choir Vocal Adrenaline, the group seen in the pilot episode performing “Rehab,” and will serve as a potential love interest for Michele’s glee club queen Rachel Berry. Creator Murphy describes the character as, “A male diva…a miva.”

Murphy also revealed that the cast of Glee will be going on tour next summer, not surprising given that the series’ music has exploded on iTunes with a full soundtrack set to drop November 3rd (full track listing).