As a response to the 2007–08 Writers Guild of America strike, Whedon directed, co-wrote and produced "Dr. Horrible's Sing-Along Blog". It tells the story of Dr. Horrible, an aspiring supervillain, who shares a love interest in a girl named Penny with his nemesis, Captain Hammer. To Whedon the miniseries was "a project of love", an accomplishment that from their excitement would be embellished with passion and "ridiculousness". His half brothers Zack and Jed and sister-in-law Maurissa Tancharoen share the other writing credits. Whedon said it was a "glorious surprise" to him to discover how well they worked together.