On the hardest case Sam and Dean have ever taken they find that they need someone and that person is not from earth.
Crossover - Doctor Who & Supernatural - Rated: K - English - Sci-Fi/Supernatural - Chapters: 1 - Words: 1,240 - Favs: 4 - Follows: 5 - Published: 8/24/2012 - 11th Doctor, Sam W.