Dr. Horrible's Sing-Along Blog is a 2008 musical comedy-drama miniseries in three acts, produced exclusively for Internet distribution. Filmed and set in Los Angeles, the show tells the story of Dr. Horrible, an aspiring supervillain; Captain Hammer, his superheroic nemesis; and Penny, a charity worker and their shared love interest.

Neil Patrick Harris is an American actor, singer, writer, producer, and television host. Primarily known for his comedic television roles and dramatic and musical stage roles, he has received multiple accolades throughout his career, including a Tony Award, five Primetime Emmy Awards, and nominations for a Grammy Award and three Screen Actors Guild Awards.