On Mutant Enemy’s DVD version of “Dr Horrible’s Sing-Along Blog” that is available exclusively through Amazon, you can also find a number of cool hidden features that add to the release.
From the Main Menu go to the “Special Features” section of the disc and highlight the menu entry “Teaser Trailer.” Now press the “Left” arrow key on your remote control and you will have the chance to watch the DVD credits.
Now run the featurette “The Music” from the Special Features and when the footage reaches chapter 3, press the “Enter” key on your remote control. A countdown screen will appear for the E.L.E. PRess “5” and then the “Enter” key during the countdown and you will be treated to interviews with the members of the E.L.E.
Now it’s time to go to the “Scene Selections” on the disc. There, select “Act II” and then “Moist Dries Up.” Press the “Enter” key now and you will see another countdown screen for the E.L.E. Press “6” on your remote control and then “Enter” during the countdown and you will see some Outtakes.
Now, simply play the movie. When the film reaches chapter 6, press the “Enter” key on your remote control. Then press “5” followed up by the “Enter” key during the countdown and you will have the chance to view some behind-the-scenes footage of the “Hammer meets Penny” scene.