The figure itself is based on his look after he's accepted into the Evil League of Evil, it probably gets about .75 seconds of air-time, but I knew the version of Dr. Horrible I wanted on my shelf was the red lab-coated victorious super-villain.
The biggest hold up on the project was finding a suitable head sculpt, and while this one is far from identical to the amazing Neil Patrick Harris I do think it's at least passable for a figure based on his Doc Horrible look. Painting the shadows under the eyes really helped the likeness, I think.
For the costume itself, I took some liberties, making it a bit fancier than the one we saw on screen. I figured that since the original was made on such a tight budget, maybe this is closer to the "big screen" version of his outfit.
25th Chuckles - Head
ROC Storm Shadow - Torso, Coat, Death Ray
ROC Flash - Legs
Star Wars Red B-Wing Pilot - Arms
Comic Pack Firefly - Lab Goggles, modified