Revealing mistake: During "A Man's Gotta Do", when Captain Hammer kneels down and crushes the gizmo on top of the van, you can briefly catch a glimpse of a black safety cable next to his knee.
Dr. Horrible's Sing-Along Blog (2008)
1 mistake in show generally
Starring: Neil Patrick Harris, Nathan Fillion, Simon Helberg, Felicia Day
Moist: I'm Moist. At my most badass, I make people want to take a shower.
Trivia: The film was written during the 2007-2008 Writer's Guild strike, which served as an inspiration for the production. Director/Co-Writer Joss Whedon, whom took part in the strike, wanted to make an independent project that he could create without having to deal with the red-tape of studios, unions, etc. Essentially to avoid the same sort-of issues that caused the strike in the first place.