It's seems you've stumbled into the Superwholock universe. Boy, have you got an adventure ahead of you. ~ When Sam and Dean investigate disappearances and crashes of planes, they have no choice, but to take to the sky themselves. The plane they inspect takes them to England, where they meet Sherlock Holmes, John Wats...
The Winchester boys help you out when a lone hunt goes wrong. Being injured you were driven back to the bunker till you run into a certain someone. The story is revolved around being Lucifers soulmate. Warning: Smut and swearing
While Sam and Dean were looking for their father, they come to find out that they have a sister... Not only is their father sending them around to solve cases, he also is putting another task on their plate, which is to take care of their little sister who's mother is the goddess of the supernatural.
A normal day suddenly turns upside down for Cas, Sam, and Dean. Trouble always seems to find them even when they aren't looking for it.
Castiel never liked people, and although he has nothing against his college room mate Dean personally, he finds that Dean is no exception. But Dean seems to like Cas like no one ever has before, and Cas is starting to think maybe people aren't all bad.