Is Dr. Horrible a musical, film, or web series? His open communication backfires in hilarious ways, as enemies like Captain Hammer follow him around. Its sense of humor is sharp, sometimes self-aware, and always accompanied by lively songs that propel the narrative forward. Joss Whedon, his brother Zack, and a gifted ensemble led by Felicia Day and Neil Patrick Harris are among the project's creators. It wouldn't be complete without...