They parked in front of the precinct and all got out. Castle and Beckett walked into the foyer with DiNozzo and Ziva following close behind. Once in the lift Castle and Beckett moved towards the back and stood close together while Ziva and Tony stood nearer the front. After Castle reached past and pushed the button for the homicide floor he asked, "So how long have you two worked together?"

"As an NCIS agent two years but in total seven," Ziva answered.

"What about the other five years?" Castle queried.

"I was a Mossad liaison officer attached to NCIS."

"Yep, she's got the super ninja skills to prove it too," DiNozzo quipped. He quickly took a step back when Ziva jabbed him in the stomach with her elbow.

"Mossad, wow," Becket commented, "So how many languages can you speak."

Ziva smiled at her but before she could answer the lift dinged and they all got out and walked over to Beckett's desk. Seeing that Gates was on the phone Beckett said, "Give it a minute for her to finish up then we'll go talk to her."

Ziva and DiNozzo nodded and Ziva took the chance to say, "I'm fluent in Spanish, French, Arabic, English and Hebrew and I know German, Italian, Turkish and Russian."

Beckett smiled and said, "А вы говорить на русском. Это круто. Не былохорошей практикой, в то время."

Ziva returned the smile and answered, "Вы знаете русский язык?" She couldn't help but sound surprised.

"Провел некоторое время в Kyiv Когда я учился в школе," Beckett replied, not taking offence at the surprise in Ziva's voice.

Tony and Castle looked at each other and both gave a matching shrug.

Beckett looked up and saw that Gates was off the phone and was looking out her window, right at her desk and the people she didn't recognise sitting there.

Nodding towards the office Beckett stood and said, "Come on I'll introduce you to Gates and you can fill her in on your case."

They started walking towards the office but paused when they heard a ding and a whistle. They all turned and saw that Gibbs and McGee were getting out of the lift, closely followed by bubbly looking women with her black hair in pigtails.

"Hey Ziva," she said, running up and hugging her.

"Hey Abbs, can you let go now please, you saw me this morning."

Abby let go and Gibbs and McGee came to stand beside her.

From behind Beckett she heard the unmistakable sound of the captain's office door opening and then heard, "Detective Beckett, a word please."

Beckett sighed then turned and started to walk. When Castle made to follow she said, "Stay Castle, she's annoyed enough as it is."

Castle looked between Beckett and Gates and nodded.

Beckett walked past him and into the office. "What are those people doing in my precinct?" gates asked, shutting the door behind Beckett.

"Their NCIS special agents and they have an on-going case that has become our problem since their main suspect got shot."

Gates looked at her and then back out into the bullpen, "And what are they doing here? Federal agencies tend to want to keep their investigations within their own teams."

"Their team leader, Special Agent Gibbs is keeping this a joint investigation."

Gates scrutinised her for a moment before saying, "Well you'd better get them in here," then as an afterthought she added, "Your team as well please detective."

She nodded and went to the door and gestured for them all to come in. As they walked past her into the office she saw Esposito exit the lift and caught his attention before gesturing for him to get in there too.

Once Esposito was with the group and they were all in the office Beckett shut the door and made introductions. "These are Special Agents Gibbs, DiNozzo, David and McGee, and their forensic scientist," she stopped not sure how to go on since she really didn't want to introduce the Goth to her Captain as Abbs and Beckett actually had no idea what her name was.

"Abby Sciuto," the Goth replied happily.

Beckett nodded her thanks in her direction and got a huge smile in response.

Gates nodded to the NCIS team and then asked, "What case brought you here?"

The next few minutes Gibbs told Gates what they were doing here and what their case was about. After saying everything he had told Beckett at the scene he said, "We were planning on sending DiNozzo and David in undercover once we figured out which biker gang," he paused again and shot a quick look at Beckett before saying, "I was wondering if I could borrow Detective Beckett and Mr. Castle so they had some back up when we eventually figure out which gang."

Gates looked over at Beckett who nodded that she didn't mind then said, "Sure, but if I'm sending in my people I want them to know how your team fights."

Gibbs nodded, "While Ducky, Abby and your ME do their thing Ziva, Tony and Detective Beckett can get to know each other."

Gates nodded again and McGee looked at his boos, "What about us boss?"

"We'll work with Detectives Ryan and Esposito on the murder investigation."

Esposito nodded and Gates asked, "Speaking of Detective Ryan where is he?"

"Family emergency," Beckett lied swiftly, well half lied, Ryan was with his family but she didn't know if it was an emergency or not.

Gates studied her for a minute before she nodded and said, "Beckett, take Agents DiNozzo and David down to the gym." Beckett nodded and opened the door but before she could leave Gates said, "And Castle is not allowed to go unless he knows basic defence skills."

Beckett heard Castle take a breath to complain but gave him a sharp look and he nodded and walked out the room. Everyone else followed and made a bee line to Beckett's desk. Once their Beckett turned to Esposito, "You work the murder and fill in Ryan when he gets back." Esposito nodded and Beckett turned to Ziva and Tony, "Come on, I'll show you the gym." She started walking to the stairs then realising that Castle wasn't following turned back and said, "Castle, you coming?"

Castle stopped glaring at Gates closed office door and nodded.

Tony and Ziva made to follow her too but Gibbs stopped them and said, "Play nice you two."

The two agents smiled, "We'll try."

The four of them walked past Beckett's desk and made their way to the gym.

I used google translate for the Russian so sorry if it's wrong. The translation should be something like this

You speak Russian. That's cool. I haven't had a good practice in a while.
You know Russian?
Spent some time in Kiev when I was in school