. "A Man's Gotta Do is the fourth song of Act 1 of Dr. Horrible's Sing-Along Blog, interpreted by Dr. Horrible, and Captain Hammer. It deals with Dr. Horrible's decision of following his plan, instead of following Penny, and Captain Hammer's choice to \"save the day\", although in a pompous way."@en . . . . . "I"@en . . "Dr. Horrible's Sing-Along Blog"@en . . . . "A Man's Gotta Do"@en . . . . "A Man's Gotta Do is the fourth song of Act 1 of Dr. Horrible's Sing-Along Blog, interpreted by Dr. Horrible, and Captain Hammer. It deals with Dr. Horrible's decision of following his plan, instead of following Penny, and Captain Hammer's choice to \"save the day\", although in a pompous way."@en . . "A Man's Gotta Do"@en . . . . . . .