Neil Patrick Harris Neil Patrick Harris

Joss Whedon's campy musical Dr. Horrible's Sing-Along Blog is set to air on The CW, TVLine reports.

While promoting The Avengers at Comic-Con, Whedon announced the three-act web series would air on the network, but the exact date remains unknown.

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Dr. Horrible
stars Neil Patrick Harris as a wannabe mad scientist who falls for Penny (Felicia Day). Unfortunately, Captain Hammer (Nathan Fillion) is always there to thwart Dr. Horrible's pursuits in life and love.

The indie project streamed free online in 2008 before it was released on DVD. This will be the first time it will air on television.