Dr. Horrible (Billy)
Dr. Horrible is a supervillain of the mad scientist variety with "a Ph.D in Horribleness." He desires to become a member of Bad Horse's Evil League of Evil and use his inventions to take over the world and enact social change for the betterment of humanity, whom he sees as ignorant to the problems of the world. As Billy, he struggles to make a romantic connection with Penny.
Dr. Horrible is portrayed by Neil Patrick Harris
