Hey! so this is a crossover between the X files and Castle. Set in season 3 of Castle and after I want to Believe. Hope you enjoy! Comments are always welcome!

Disclaimer: I sadly do not own either the X-files or Castle but I love both of them!

"Scully! Scully! Scully!" Mulder raced into the study of his house as Scully looked up from the novel she was reading.

"Mulder" she said nonchalantly.

Mulder was disappointed by her lack of enthusiasm. It was hard to surprise a woman after you'd been partners for such a long time.

"Scully I just heard from on old buddy of mine that one of their colleagues…Are you listening?"

Scully had begun reading her novel again and evidently was not paying attention to Mulder's ramblings.

Mulder shook his head and sat down on the couch opposite to the chair Scully was sitting in. "Scully" he started again. She looked up, noticing his serious look and closed her book and set it on the table next to her.

"You have my undivided attention," she said. "The adventures of Nikki Heat can wait"

Mulder smirked at the mention of Richard Castle's novel. "That's what I want to talk to you about!"

Scully looked confused. "You want to discuss Nikki Heat? Did aliens come down and pull her out of her book? Is she out on the streets trying to hunt crime but no one knows who she is and everyone keeps telling her that she's a fictional character? Do we have to find the aliens so that she can go back to Jameson Rook?"

Mulder laughed "No Scully! I meant the author." He smiled, "Richard Castle works with the NYPD right?"

Scully sat up in her chair a little more. "So I've heard."

"Well one of my buddies heard that they had an alien encounter!"

Scully sighed as she picked up her book "So Mulder? They don't work on the X-files. They are not searching for extraterrestrial answers. They should just leave it will enough alone or one of them will end up on trial from the military."

"Scully don't you see that's my point!"

Scully closed her book and once again set it on the table next to her.

"We have to stop them looking into this alien stuff. I mean I don't regret a single things we did together Scully" Mulder looked into her beautiful eyes and she smiled "If we hadn't done everything we did we wouldn't be here and we wouldn't be together." He paused "But I don't wish what we've been through on anyone. Which is why we have to go to New York and help them out."

Scully sat and stared at Mulder as she thought about everything he had just told her. Yes, their lives had been hard and yes, she wouldn't trade it for anything because it brought her to Mulder but at the same time he was right not wanting their lives to happen to other people. But what were they going to do? Go down to New York and steal the case out from under them?

"We're gonna take the case from them" Mulder announced.

Scully chuckled. She knew Mulder too well. Her face became serious "How Mulder? We don't have any ties to the FBI anymore remember? And besides I have work in the morning."

"Ya but didn't you just say that you had some vacation days coming up? We could take our old badges, dress up nice, no one in New York knows who we are. Who's going to question us? No one ever expects someone to impersonate the FBI."

Scully groaned but had no response. She wasn't sure she wanted to plunge down into the sewers again. They were getting too old for these kinds of shenanigans. But there was an allure to going out on the hunt again. She did enjoy watching Mulder become so committed to a cause. She couldn't help but want to go with him. She would always follow him no matter how ridiculous the plan.

Scully began to nod "Alright Mulder, if you think we can pull this off I'll come with you. But only for this one case. W' re not making our lives a crusade again, we're too old for that, we've given up too much to start over."

Mulder smiled and reached into his back pocket to pick out to small rectangular pieces of paper. He handed one to Scully as he kissed her cheek. She looked down at the plane ticket that was now in her hand. She chuckled.

"We leave tomorrow morning!" Mulder smiled.