You know you’re a hit when people cosplay you. Check out the this Dr. Horrible cosplayer at the San Diego Comic-Con.

The first three acts of Dr. Horrible’s Sing-Along Blog, the online tragicomic musical by Joss Whedon (Buffy the Vampire Slayer) starring Neil Patrick Harris (Doogie Howser, M.D., Starship Troopers) and Felicia Day (The Guild), are now streaming free on Hulu. Whedon wrote Dr. Horrible during the WGA strike, verifying Duncan Riley’s prediction of WGA talent being diverted from Hollywood to the Web.