High Quality Content by WIKIPEDIA articles! Dr. Horrible's Sing-Along Blog is a 2008 musical tragicomedy short film produced exclusively for Internet distribution. It tells the story of Dr. Horrible, an aspiring supervillain; Captain Hammer, his nemesis; and Penny, their mutual love interest. The movie was written by writer/director Joss Whedon, his brothers Zack Whedon (a television writer) and Jed Whedon (a composer), and actress Maurissa Tancharoen. The writing team penned the musical during the WGA writers' strike. The idea was to create something small and inexpensive, yet professionally done, in a way that would circumvent the issues that were being protested during the strike.