ComedyDocumentaryMovie The Making of Dr. Horrible’s Sing-Along Blog Status: Released Release Date: 2007-12-19 The Making of Dr. Horrible's Sing-Along Blog Documentary Comedy Overview The making of 'Dr. Horrible's Sing-Along Blog'. Cast Felicia Day Herself Nathan Fillion Himself Neil Patrick Harris Himself Simon Helberg Himself Maurissa Tancharoen Herself Jed Whedon Himself Joss Whedon Himself Zack Whedon Himself Crew Ethan Shaftel Directing Ryan Jackson-Healy Editing Ethan Shaftel Editing Ben Van Cleave Crew Ethan Shaftel Production