Neil Patrick Harris (How I Met Your Mother) stars as Billy, A.K.A. Dr. Horrible, a ...
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![Dr. Horrible's Sing-Along Blog [Blu-ray]](http://ecx.images-amazon.com/images/I/51iNf9I9UBL._SL160_.jpg)
DR HORRIBLE'S SING ALONG BLOG - Blu-Ray Movie
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The soundtrack to the hit musical from Buffy the Vampire Slayer and Firefly creator Joss ...
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