Heya guys! This is only short, yet, because it's the prologue of a story that I'm currently working on. Criminal Minds is my favourite, favourite, favourite crime drama and NCIS is my second favourite. I love the characters in both (I miss JJ! And Gideon! (which is why JJ is going to be in this story, no complaints, I refuse to write a CM fanfiction without JJ in it)) and I've always wondered how they might interact with each other so I cooked up this little baby and I'm going to be paying her special care. I see lots of research on the horizon for me!

Anywho R&R and enjoy!

NCIS, Washington D.C.

Leon Vance, Director of the Naval Criminal Investigative Service stood behind his desk staring out his window, his expression one of extreme frustration. He had his arms folded and was chewing on the inside of his cheek as he thought.

Behind him his door opened and Vance turned around to look at Gibbs who was quietly closing the door behind him.

"You wanted to see me, Leon?" Gibbs asked.

"Anything?" Vance questioned.

Gibbs shook his head. "I feel like a break is close." He sighed. "I don't know where we're going here but I can feel it."

"That's not good enough," Vance sighed. "I'm going to have to call the FBI."

"No." Gibbs eyed Vance darkly. "We don't need any help from the FBI, Leon, we're fine."

"No we aren't, Gibbs. We can't do this on our own."

Gibbs sighed and rubbed his head. "Give me one more week Leon and I think I'll have this case. Do not call the FBI. Please."

Vance nodded reluctantly and Gibbs smiled before leaving the office quietly. Vance sat down behind his desk and looked at the phone. A non-verbal agreement didn't count as an agreement. It wasn't as though he didn't have faith in Gibbs and his team, it was just that he had faith in this killer to keep avoiding them. They did need help. And he wanted the best help.

It was up to the director of the FBI to give him the best help.

Behavioural Analysis Unit, Quantico

JJ pushed open the doors of the Bullpen and walked through it with intent, ignoring the cheery morning greetings of Derek Morgan and Emily Prentiss. They frowned at each other as JJ walked along the railing and into the briefing room.

She paused at the sight of Hotch and Rossi in discussion but they both looked at her so she held out the case.

"The Director called me," JJ explained as Hotch took the case file with a frown. "He says this is urgent."

"Where is it?" Rossi asked as his unit chief opened the file and looked at the first photo that was on the inside cover.

"Here in DC, actually," JJ explained. " We're going to NCIS and we're going to be there for a while, it's not a very good case."

"NCIS?" Hotch asked. "We've never worked a case with the NCIS before."

"Well according to the Director he was asked by Director Vance to send a team to help and the Director chose us," JJ explained. "They've been chasing this guy for over a month. His first victim was a Marine and then after that he killed two civilians who had nothing to do with the navy before killing a Petty Officer on his way home from a bar. The way the victims were selected makes NCIS think that this UnSub wanted them to investigate, not anybody else."

Rossi and Hotch exchanged raised eyebrows.

"How many victims altogether?" Hotch asked.

"Eight: one marine, two naval officers, four civilians and one NCIS agent." JJ bit her lip. "Director Vance said that they're getting nowhere with the investigation."

"What's the MO?" Rossi asked.

"Four gunshot wounds to the chest with a 47 Magnum and then one post mortem shot to the head. All shots were at point blank range and all victims have been DOA."

"Looks like we're going to the Naval Criminal Investigative Service," Rossi shrugged. "Gather the team."

"Vance wants us there ASAP, I'll brief the team in the cars. Vance wants us to bring our tech with us, we'll be using their computers apparently." JJ shrugged as Hotch frowned.

"Alright, go and get them JJ," Hotch told her. He turned to Rossi as she left and they both looked at the photograph. "This looks like a typical serial killer. How haven't they found him yet?"

"No serial killer is the same as another, Aaron, you know that."