“Dr. Horrible’s Sing-Along Blog”, the latest project by Joss Whedon (Buffy the Vampire Slayer, Angel, Firefly & Serenity), is a three part web-based musical mini series staring Neil Patrick Harris as Dr. Horrible, Nathan Fillion as Captain Hammer and Felicia Day as Penny. All three act are online now and available for free through July 20th:
Annalee Newitz has a great write-up on Dr. Horrible’s Sing-Along Blog over on io9.
