You have only until July 20th to watch all three parts. It's good. Joss Whedon directed Neil Patrick Harris as Dr. Horrible, a wanna-be super villain trying to both impress a girl and join a league of villains. As I said, they will only be online for a few days, so watch them now before you actually have to pay for something. Because we all know that giving money for something that you can have for free sucks.
Watch the first part now.