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 "Brand New Day", at one point, Dr. Horrible stabs a picture of Captain Hammer attached to a dartboard with a handful of darts, all right in the center of the picture. A few shots later as Dr. Horrible sits, suddenly the darts are far-more spread out. (It's in the background and can be hard to see, but it's noticeable.)
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.