Dr. Horrible's Sing-Along Blog is the brainchild of Joss Whedon, who has enlisted his friends Neil Patrick Harris, Nathan Fillon, and Felicia Day to create a musical in which Dr. Horrible (Harris) blogs about his daily routine, reading fan letters, and of his attempts to join the Evil League of Evil. Captain Hammer (Fillon) is his nemesis and Felicia Day (a Buffy alum) is his love interest that he never talks to. Part 1......