Dr. Horrible's Sing-Along Blog S00 E04 The Making of Doctor Horrible's Sing-Along Blog - Part 2 - The Music

"For every day, there is a night. For every world, there is an underworld. And for every hero... there's this guy!"

Part 2 of a mini documentary series that shares details on how the music of 'Dr Horrible's Sing-Along Blog' came to be.