When Dean goes to sell his soul at the crossroads to bring Sam back, someone else steps in to negotiate the deal. Cas did get a sign and it sent him off into the past to change things. AU from The Man Who Would be King and All Hell Breaks Loose.

(Not shipping) Dean has never met anyone like the Doctor before. For that matter, the Doctor hasn't met anyone like Dean. They keep meeting out of order, too, and that only complicates what is already a rocky relationship. The Doctor isn't human, after all, and he has a tendency to show up when trouble is brewing.

"Two serial killers, John. Two killers who have successfully faked their deaths multiple times! It's Christmas! It's double Christmas!"

When a kidnapped Tony DiNozzo is rescued by legendary - and supposedly dead - serial killers Dean and Sam Winchester, the NCIS team takes over the Winchester investigation. What they find is a file filled with contradictions and impossibilities. This is an attempt to cross these shows but keep both in canon. No slash. No pairings.

While on a second trip to his father's storage locker, Dean puts on an old Halloween costume that turns out to be much more. The cursed object grants all of the powers of the fabled hero Superman, but for a price. After all, every hero needs a villain.