Dr Horrible blogs about his plans to take over the world, his dislike for Captain Hammer, his latest brainchild the Freeze Ray, and his adoration of Penny from the laundromat.

Dr Horrible is disheartened by the budding romance between his dream girl and his arch nemesis, while the Evil League of Evil urges him to take his efforts to the next level.

News of Captain Hammer's newfound social concern has the whole town talking, but Dr Horrible has other plans for him.