Doogie Howser, M.D. and Dr. Horrible's Sing-Along Blog Crossovers
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Crossover with Doogie Howser M.D. What if some not-very-nice things had happened to Doogie during Season One? Would Dr H possibly have become our very own favourite super-villian?
Rated: T - English - Drama - Chapters: 1 - Words: 1,084 - Reviews: 5 - Favs: 4 - Published: 1/9/2009 - Doogie H., Dr. Horrible/Billy - Complete