It's one of those things that you think would be cool if it happened, and then it actually happens. Joss Whedon is reporting that he'll be directing an upcoming episode of Glee.

We know he has on occasion stepped outside his usual genre of sci-fi and fantasy based on his directorial work on The Office. We know he's into musical theater based on his creation of the musical episode of Buffy the Vampire Slayer and Doctor Horrible's Sing-A-Long Blog. Now, he's merging all that he's done before. Or at least he would be if the episode of Glee ends up involving evil scientists and vampires.

Despite my own history in musical theater, I haven't been watching Glee. Whedon's involvement in an episode would certainly pique my interest enough to catch it. Perhaps he could get together with his brother Jed and write the music for the episode, as well, turning it into a 42-minute operetta. They've done it before.

In case you missed our live blog of the event and you haven't been checking around the Interwebs, Emmy host Neil Patrick Harris did a quick skit starring his character Doctor Horrible from Dr. Horrible's Sing-Along Blog. The sketch guest-starred Nathan Fillion as Captain Hammer and a couple of other cast members. Oh, and by the way, that particular Internet series won an Emmy itself.

One can only wonder if Joss Whedon had a hand in the sketch. It certainly seems that way. The sketch used his sort of style and humor, particularly the bits where the screen was "buffering".

Fortunately, and perhaps in appreciation of the existing rabid fanbase of anything Whedon-related, a clip of the segment has already made it to YouTube (so TV Squad itself cannot be sued for taking someone else's intellectual property. You hear that CBS?). Hopefully it remains up there for a little while. The clip of the Dr. Horrible appearance at the Emmys follows after the jump.

The man never stops working, even during a writer's strike. According to his blog, Joss Whedon has finished writing a web musical consisting of three ten-minute episodes.

The show is called Doctor Horrible's Sing-Along Blog and will star Neil Patrick Harris as Doctor Horrible and Nathan Fillion (who played Captain Malcolm Reynolds in Joss' previous works Firefly and Serenity) as Captain Hammer. On top of all this, he's still working on the television show Dollhouse and writing comics.