Dr. Horrible's Sing-Along Blog, a popular Web musical series starring Neil Patrick Harris, will finally be seen by TV viewers, as the CW broadcasts the four-year-old project Tuesday night, reports GregInHollywood.
DHSAB centers on Harris's character, Dr. Horrible, an evil mastermind bent on taking over the world. Horrible is often thwarted by Captain Hammer, played by Nathan Fillion of Firefly and Waitress fame. The comedy was launched in 2008 when the TV industry was reeling from a writers' strike. Tonight's broadcast starts at 9 o'clock Eastern. Watch a preview below.