The third act of Joss Whedon’s “Dr. Horrible’s Sing-Along Blog” has been posted. Having seen it in its entirety, I can tell you that this post-modern comic book musical, in which Neil Patrick Harris’ sweetly inept super-villain Dr. Horrible is far more sympathetic than Nathan Fillion’s egotistical, insensitive jerk of a super-hero Capt. Hammer, is an absolute hoot! Here’s the direct link, but remember, you only until midnight on Sunday, July 20 to download it for free.