We close out Singin' September with the first, and possibly only, internet musical: Dr. Horrible's Sing-Along Blog. We are joined by guest co-hosts co-writer of Freaked Tim Burns and author Russ Linton to talk about the cult classic directed by Joss Whedon. It features Neil Patrick Harris as the eponymous doctor who is dead set on upending the status quo by taking down his nemesis played by the smug Nathan Fillion. Along the way he also tries to get Penny, played by Felicia Day, to fall in love with him. It's a classic tale of mad scientist gets girl, mad scientist makes freeze ray, mad scientist becomes super-villain.

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