Dr. Horrible's Sing-Along Blog is a 42-minute tragicomic musical in three acts, each released separately. It tells the story of Dr. Horrible, an aspiring supervillain, Captain Hammer, his superhero nemesis, and Penny, their mutual love interest. The movie was written by writer/director Joss Whedon, his brothers Zack Whedon and Jed Whedon, and Jed's then fiancée, actress Maurissa Tancharoen. The writing team penned the musical during the WGA strike. The idea was to create something small and inexpensive, yet professionally done, in a way that would circumvent the issues that were being protested during the strike.
Neil Patrick Harris
Nathan Fillion
Felicia Day
Simon Helberg
Nick Towne
Jed Whedon
Rob Reinis
Otto Michael Penzato
Richard Partlow
Maurissa Tancharoen
Stacy Shirk
Steve Berg
David Fury
Marti Noxon
Michael Boretz
Lance Lanfear
Michael G. Canaan
Jonathan O'Reilly