Or the Time Sam, Dean, and Cas Helped John Figure Out What The Hell Was Killing Those People While Simultaneously Getting Destiel, Sabriel, and Johnlock To Happen. (I own nothing)
Crossover - Supernatural & Sherlock - Rated: T - English - Supernatural/Romance - Chapters: 10 - Words: 12,972 - Reviews: 60 - Favs: 70 - Follows: 45 - Updated: 5/17/2014 - Published: 3/17/2014 - [John W., Sherlock H.] [Castiel, Dean W.] - Complete