Joss Whedon, of Buffy and Firefly fame, along with the lesser Whedon brothers, Zack and Jed, got bored during the recent Writer's Strike. So they wrote a campy B-Movie Musical, staring Neil Patrick Harris, Nathan Fillion, and Felicia Day.
NPH plays as Dr. Horrible, an amateur mad scientist, attempting to gain entrance into the Evil League of Evil. He videoblogs his evil schemes, and answers reader mail, you know, the whole blog crawl. Dr. Horrible has no super powers, beyond what he can build himself.
Felicia Day plays Penny, Dr. Horrible's crush, whom he can't get up the nerve to talk to. She volunteers her time to try and convince people to sign a petition to open a new homeless shelter.
Nathan Fillion plays Captain Hammer, Dr. Horrible's arch nemesis. Captain Hammer dislocated Dr. Horrible's shoulder in their last showdown. He was born with a full head of hair and the ability to bench press 500 lbs.
The show is being released in three acts on the website I linked to above. The first act was released on Tuesday, act II will be released today, and act III on Saturday. It has a surprisingly high production value for a web released side project. It looks just like any other live action TV show. The writing is campy and somewhat uninspired, but the music is well done. NPH does a good job both acting and singing. Day has a surprisingly good voice too. Fillion seemed a little out of sorts and I'm not sure how much of that was him and how much was the character.
It's pretty funny, and worth the 14 minutes it takes to watch the act. There's also a webcomic about Captain Hammer available here. Joss really went all out on this thing.