So I’ve finished my rewatches of all the Joss Whedon series between 1997-2010 except one – and it’s the most unusual one. “Dr. Horrible’s Sing-Along Blog” (2008) is three 15-minute web episodes that add up to length of one TV episode. It was penned by Whedon and his brothers Zack and Jed and Jed’s wife Maurissa Tancharoen (who also plays Captain Hammer Groupie No. 1) during the TV writers’ strike.