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.
Dr. Horrible: Oh goodness, look at my wrist, I have to go.
Dr. Horrible: I don't have time for a grudge match with every poser in a parka.
Dr. Horrible: What a crazy random happenstance.
Captain Hammer: It's curtains for you, Dr. Horrible. Lacy, gently wafting curtains.
Continuity mistake: During the very beginning of "My Freeze Ray", as Dr. Horrible is about to set down his basket of laundry, the bottle of detergent sitting on top of his clothing rotates 90 degrees after the scene briefly cuts to Penny.
Trivia: After the series became a major success upon release in 2008, director Joss Whedon teased that he would be doing a sort-of "sequel" at some point in the future. At one point, an outline and a number of songs for the sequel were written, though due to other obligations, Whedon had to push back production. As of 2018, the long-rumored sequel has yet to materialize, though everyone involved has continued to hint that a follow-up may still happen eventually.