Don't Blink, Mr Holmes. I've got the Winchesters to Help.

A real estate agent named Sara Jackson has no idea what she's got herself in for when she attempts to sell Bathory House, a crumbling building known for it's disappearances. So naturally, these disappearances had come to the attention of two brothers that liked to kill demons, hunt ghosts and shoot werewolves.
The two didn't know what they'd gotten themselves in either.
As Sara worked undercover for UNIT; American division, Mycroft Holmes knows her very well. Her disappearance causes him to send his younger brother and his blogger out to America where he will find her. Well, Sherlock has no idea what is in stall for them.
And finally, a crazy man in a blue box is called to the scene as his monitor shows up some deadly waves. Thankfully, he does know what the things are capable of. Yet, unfortunately, he is unable to do much himself when he's stuck in 1921 with Sam, John and Sara.

Just your normal SuperWhoLock crossover! I had this idea one day, and I was just dying to test it out and I think it's actually okay! [WARNING! Unfortunately, this story shall have no ships or romance, as I purely want to focus on how the characters would act around each other. However, there could possibly be some swearing in it.]
I OWN NOTHING BUT THE WORDS TO THIS STORY AND THE CHARACTER OF SARA JACKSON. ALL OTHER CHARACTERS AND ANYTHING TO DO WITH THE CHARACTERS BELONGS TO EITHER THE BBC OR THE CW/ERIC KRIPKE.