"Only a true best friend can protect you from your immortal enemies."

Richelle Mead

The '67 Chevy pulled up to NCIS HQ as a low rumble of thunder rang out through the ship yard. Abby hurried quickly inside reaching into her bag for her credentials. She had left the Winchesters who were going back to their motel to get changed into their cop suits. Abby knew the people at NCIS were some of the best in the country and no matter how much of an expert the pair claimed to be, Sam and Dean had to be careful. This wasn't some local police investigation that they were going to wriggle their way into. This was an investigation led by the one and only silver-haired fox, Special Agent Leroy Jethro Gibbs.

Rushing out of the elevator she grabbed her lab coat off the hook and rushed over to McGee. "The girlfriend?" Abby enquired.

"Some of the blood on the dumpster came back as unidentified female, it's our best guess that its hers." he replied looking up from the bag of evidence containing a bloody shirt. "Not enough blood loss to kill her, just split forehead, but chances are the hit knocked her unconscious and she was taken by the assailant. Tony found some tire tracks that match a truck in the neighbouring alley. Nothing special but Bishops best guess is she's been taken out to the country and is being housed possibly in a barn. Going by his MO it doesn't seem like he was planning that Jones would be there, hence the sloppiness of the abduction. Hopefully this buys us some time." She gave him a puzzled look taking an evidence bag off the table. "Metro sent over their evidence from the other cases for us to go over."

She nodded pulling over a chair. "So they didn't find much?"

"No but I've just had a call from them. They are sending over an agent Burkhardt and agent Griffin who are going to help go over the evidence again to see if we can find something new."

Abby sighed. Burkhardt and Griffin? That's one way to tell the team you're monster hunters disguised as cops without actually having to tell anyone. Sam and Dean should thank the fact that none of the team have the time to watch Grimm because that would have made things a little complicated. "Does Gibbs know we're working a joint on this one?"

"No, him and Tony are currently off the grid. The girlfriend lived on a farm in Frederick when she was not living in Baltimore while studying so they went to go check it out. You can be the one to tell him when they get back?" hinted McGee with a grin.

"You're the agent Tim, that's your job." responded Abby. "This," she said gesturing to the table piled with evidence, "is my job. So scram. Do your agent thing with Bishop and find the girl, the Metro cops will be here soon to help me out."

"You ok Abbs? You have been acting a bit off all day."

"It reminds me of an old case. That's all."

Picking up his blazer, McGee stood up and left the lab. After retrieving a Caffpow from the fridge Abby went through the pieces of evidence one by one. Metro had done a pretty good job, there was no missed DNA or unidentified substances which left then no closer to identifying the killer.

An hour had passed and Abby was starting to worry that the Winchesters had been caught out when they wandered into her lab escorted by agent Perry. Sam gave her a small nod.

"It's alright Perry, I've got them from here." Turning on his heels, the agent shuffled his way back to the elevator. She heard a ding as the button was pressed but they didn't start talking until the doors were heard closing. "Any problems?" she asked.

"Yeah. We had to knock out a metro cop and stole his phone to make the call that we were coming. He should hopefully pull through." answered Dean with a grin starting to form on his face. Abby looked alarmed.

Sam rolled his eyes at his older brother. "No, we had no problem. Didn't expect the metal detectors on the way in, that's all. Explaining why we were carrying non state issued firearms made it all a little sticky."

"Actually," added Dean. "Your building has better security than a national security complex. You remember that time Sammy? We had to sneak into the warehouse to get a look at that plane? Phantom traveller on board?" he chuckled. "And then they came and we..."

"Dean now is not the time to talk about one of your many close calls with law enforcement officials. A girl is missing."

"Just trying to lighten the mood." said Dean as he started making his way over to the table in the centre of the lab picking up an evidence bag and studying it.

"Abby?" asked Sam. "What has your team got so far?"

Abby explained, mainly to Sam, as Dean was busy playing with Bert who he had found housed on top of the fridge, what the team had found so far. He agreed that this was definitely a werewolf but unlikely that it was a pack as holding a hostage for food was a quite rare MO and one you never came across when they were working with others. They had worked out a timelined map of events and worked out from when the bodies were dropping that the werewolf was feeding every week.

"Dean, would you cut that out?" asked Sam.

With one more fart from Bert and a very fed up Sam, Dean placed Bert back above the fridge and came over to the pair. "So they think she's being kept in a barn?"

"That's correct." confirmed Abby.

"Doesn't make sense. Werewolves that eat humans tend to not abduct but eat on the spot. It wouldn't make sense for it to be a farmer as the chances are it would eat most of the animals, if you are eating human hearts you're not going to give up a few cattle, they would make a perfect snack."

"Once a week feeding's only starting recently must also mean they are new to the area or newly turned. Abby what was the date of the full moon last month?"

"Um.." she tapped away at her keyboard. "The 16th."

"Exactly when the first body dropped."

"It explains why there was no ligature marks on her, she was his first victim and his impulse was too strong to keep her captive." added Sam. "Was there any animals found missing hearts before that date?"

She tapped again. "There was. Up in Pittsburg once a month a cow or other large farm animal was found missing a heart. About a year ago it had been going on. There hasn't been any more since. Wait." she bought the screen up onto the plasma."On the 16th a man was found dead in what appeared like a bear attack. George Harrison."

"Well we have found our original wolf. Me and Sam will go check it out, see if we can find any links that lead us to who he bit."

Unnoticed by the trio, the elevator beeped open and out stepped special agent Gibbs. Wandering into the lab with a Caffpow, he walked in and studied the screen. "What you got there Abbs?" She froze. "And who the hell are they?" he asked pointing at Dean and Sam.

"Agent Burkhardt and Griffin." replied Dean, as almost simultaneously they both removed their badges from their pocket and showed them to Gibbs.

"Didn't McGee tell you Gibbs? We're working a joint with metro on this one, they sent these two over to help my go through all the evidence again."

He eyed the brothers who were on their way out. "Then where the hell were they going? I've got the lead in this one so you two stay put. Abbs can I have a quick word with you?" he shuffled her through the moving door into the second room. "What are they doing here Abbs?" Gibbs asked out of earshot of the Winchesters.

"Metro sent them to help me out with the evidence." she repeated, avoiding his eye contact.

"Whats going on Abby? You hate agents from other agencies being in your lab. It took you months to warm up to Fornell yet here they are and you're sharing case related info with them already. They're not even metro are they?"

"I I don't know what you are on about Gibbs."

"They have firearms that aren't state issued, that," he signalled to the pair, "was all too planned. They should know that we take the lead in all Navy related deaths and there they were about to hurry off and investigate some dead guy who I don't even know about. What's really going on here?"

Abby broke. She started crying and told Gibbs everything. She told him about her past, who the Winchesters were and about how it all related to the case. When her tears had started flowing both Sam and Dean had taken a step towards her but Gibbs's glare had stopped them in their tracks.

When Abby had finished and sniffled it all away, Gibbs had started towards the Winchesters. Sam stood there sympathetically but Dean looked fed up, now he was going to have to explain how they were not mass murderers and why they were standing in the lab even though they had apparently died at least twice. He sighed. They were going to need new metro badges after this.

"Werewolf?" Gibbs queried. They nodded. "You two hunt them?"

"And everything else that goes bump in the night." answered Sam.

Abby stood there, head facing the ground. "And you think this, werewolf had something to do with the death of the girls, and our Seal as well as the abduction of his girlfriend?"

"We do."

"You trust them Abs?"

She looked up at the brothers. "I do. I would have been werewolf dinner back in college if it wasn't for their father John. The marine saved my life."

Gibbs pondered over what she had said. He turned back to face the Winchesters. "We best get going then. We'll need to make a stop at a gun shop on the way to Pittsburg, I suppose we're going to need some silver bullets." he nodded towards the brothers. "Semper Fi."

The Marine corps motto, 'Always faithful'. Dean smiled. "Semper Fi."

AN: Thanks for all the follows guys, keep reviewing and telling me what you think! Sorry about the long wait, I hope to get another chapter up in the next few weeks before I go on holiday. Only two more exams left!