Listen to Dr. Horrible's Batman-Fighting Musical Number

Neil Patrick Harris is up to his old singing supervillainy, this time as the Music Meister on Batman: The Brave and the Bold. Listen to his first nefarious number, where he forces the show's heroes and villains to sing along.

NPH's episode, "The Mayhem of the Music Meister" premiered at Comic Con, where it wormed its catchy way into our hearts. UK and Canadian fans have already seen the episode in its entirety, but those looking to catch it on Cartoon Network in the US will have to wait until October 23.

[via Topless Robot]