When Tony was 9 his father told his nanny to take Tony someplace for the summer so he would be out of the way so she took him up to his grandfather's old hunting cabin by the lake. While there Tony became friends with another boy and his baby brother, their names was Dean and Sam Winchester. It was during this summer than Tony learned that vampires were real when he witness Dean's father killing on that had be preying on the people of that area.

Before Tony left for home, Dean and him exchanged address so that they could write each other, even through both of them knew it would only be a semi regular thing; for Dean because of the traveling they had to do and for Tony because his father would never approve of such a thing.

When Tony became a police officer he started to pass along to the Winchester and a few other trusted hunters information about anything strange that they might want to investigate. His home also became a place for the Winchester to crash at when need or when they needed to be patched up without questions

While Tony never hunted the creature of the night and shadows, he did became a source of information for hunters. He once suggested that someone in Hollywood was in the know about what was out there since some of the movies did come close to the truth or exactly on the nose about some creature.

Tony has always kept the darker part of his life away from his professional side… that was until folder with the name Initiative landed on Gibbs' desk.

~*~

Not sure if this is a NCIS/Xander, NCIS/Supernatural or a NCIS/Xander/Supernatural fic. Guess that's up to whoever takes it.

Could see Tony accidentally seeing what was in the folder and saying, 'That's harmless' to a photo of a demon and Gibbs asking what he knows about these.

I can see Tony wondering if he should call his old friend Dean in on this case.

Options:

Doesn't that have to be Initiative based. Could be another case in which Tony stumbles across something Supernatural and calls in his old friends while at the same time the Scoobies or New Slayer Council comes to investigate. See a lot of toe stepping while Tony tries to avoid head slaps.

Xander sucks up spirits like a kid sucks up jellybeans (He always leaves the black ones behind)

Dean sold his soul in order to bring his brother back to life. He died a year later and his soul went to Hell.

Xander walked into Hell to stop the First Evil… And when he walked out he wasn't alone.

Xander sucked up Dean's soul and carried him out of Hell and now he's stuck with Dean being a back seat driver. In order to shut Dean up and maybe find a way to free Dean, Xander hunts down Dean's brother Sam.

~*~

Xander sits down in the booth across from Sam. "Hi Sammy," he said.

"Do I know you," Sam asks cautiously.

"No, but your brother does," Xander replied before turning to the waitress. "Burger, extra onions and what type of pies do you have?"

"We have cherry, apple, lemon and chocolate," the waitress replied.

"Mmmm… cherry," Xander said as if it was the most delicious thing in the world.

"That will be right up," the waitress said before walking away.

"My brother," Sam said with a steely look. "My brother is dead."

"Yeah I know," Xander said. "He also say you better not have scratched the paint, bitch."

Sam leaned back. "Cristo."

"Won't work after all he's a spirit not a demon," Xander said. "Beside I don't think that will work on me considering where I'm from."

"Here you are sugar," The waitress said as she put Xander's order in from of him. "Let me know if you need anything. "

Thank you," Xander said before taking a big bite out of the burger. "I hate onions but Dean makes me order them. Of course I make him listen to country music."

~*~

"Here, drink," Bobby Singer order as he held out a glass of water to Xander.

Xander took the glass and drank the water. "Ah… Methodists. Nice after taste."

Sam looked at Xander then at Bobby and then back at Xander. "You can tell what religion the holy water had?"

"You can't?" Xander replied. "Catholic tend to be a bit bitter. Methodist has a sweet taste to it. Protestants has a bite."

Bobby and Sam stared at Xander in shock "And Dean can't believe you bought that."

~*~

Options:

You can have Dawn traveling with Xander in order to escape all the 'special girls'. Could have her sneeze up Dean a new body.

If you can figure out a way to get Dean a new body you could make it a Xander/Dean fic. Could make them soulmate and that why Dean was attracted to where Xander was for the battle

If you want it can be a Xander/Sam fic with Dean wondering if it's incest if the spirit of your dead brother shares the body with your lover