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
as Doctor Horrible
Nathan Fillion
as Captain Hammer
Felicia Day
as Penny
Simon Helberg
as Moist
Nick Towne
as Bad Horse Chorus #1
Jed Whedon
as Bad Horse Chorus #2
Rob Reinis
as Bad Horse Chorus #3
Otto Michael Penzato
as Driver
Richard Partlow
as Mayor
Maurissa Tancharoen
as Groupie #1
Stacy Shirk
as Groupie #2
Steve Berg
as Groupie #1
