Here's chapter 5. Since my exams start on Wednesday the next update will either take a long time or will be up quickly, depending on how much I write in my revision breaks. Enjoy :)

The four of them came to a stop by the murder board. Seeing that Ryan was back Beckett asked, "Jenny ok Ryan?"

Ryan, Esposito, Gibbs, McGee and Abby all turned towards them and Ryan nodded, "She's alright. Her Dad had a stroke so she's going up there for a few days and wanted to see me before she went."

Beckett nodded, "I hope he's ok."

"He should be fine, it was only a mild one," he glanced towards Gates office then back to Beckett, "Thanks for covering for me with the Captain."

Beckett nodded and turned to the others, "Any leads?"

"Ducky and Dr. Parish have started the autopsy and we should be getting results soon," Gibbs said.

"When we get the bullet I'm going to run ballistics since I can do it faster than your labs," Abby said, bouncing on her feet.

Tony looked her up and down and asked, "How many Caf-Pows have you had Abby?"

"A few," she said, taking a slurp out of the one in her hand.

Tony looked at McGee, "Only one in the time you've been gone but she had a few this morning."

Castle, Beckett, Esposito and Ryan all exchanged a look that clearly said they thought Abby was a little crazy.

"How did Ducky get here so quickly?" Ziva asked her boss.

"He had already landed when I rang him and he went straight to the morgue from the airport."

Ziva nodded but Tony asked, "How come he was already here?"

"Because he knew after the call we made last night about Sumner going missing he was probably going to need to be here."

"Ah," Tony said.

Beckett turned to Esposito, "Have you got a call from Lanie yet?"

As Esposito shook his head Beckett's phone chimed. She pulled it out and read the text, "Never mind Espo. She just text me."

Castle picked up her coat off the back of her chair and helped her into it, "We'll go see Lanie while you carry on here."

Ryan and Esposito nodded and Gibbs said, "Tony, Ziva go with them." The two of them nodded and the four of them walked to the lift.

Once in autopsy Lanie greeted Beckett with a "Hey girl," before she looked at Castle and said, "Writer boy."

"Hello to you too Lanie." He gestured to Ziva and Tony and said, "These are Agents Tony DiNozzo and Ziva David."

Lanie nodded a hello and then they heard a cheery English accent say, "Tony, Ziva."

"Ducky," Ziva answered with a smile. "Detective Beckett, Castle, I'd like you to meet Dr. Mallard. Ducky, Detective Kate Beckett and Richard Castle."

"Nice to meet you Dr. Mallard," Beckett said, shaking his hand.

"Please call me Ducky my dear."

Beckett smiled and turned to Lanie, "You cheered up yet Lanie? If not I'm sure Esposito will help you work it out."

Lanie glared at her and Beckett just smirked. "Your text said you had something."

Lanie glared a little longer then said, "We dug out the bullet. It punctured his heart and got lodged in his spine."

Ducky passed the plastic jar containing the bullet to Tony saying, "Abigail will need this when you see her again."

Tony took it and started to shake it so the bullet rattled. Ziva quickly picked up a scalpel and threw it in his direction. It whizzed past his ear and stuck in the notice board behind him.

Tony squeaked and stopped shaking the jar immediately. Beckett, Castle and Lanie all looked shocked but Ducky just shook his head and tutted, "Really Ziva."

She walked and pulled the scalpel out the board and handed it back to Lanie, who still looked shocked and then she turned to Ducky and said, "At least I didn't aim at him." She snatched the jar from Tony's hand, just to make sure that he didn't do it again, "And he should be glad it was a scalpel and not my normal knife."

Tony swallowed, then said in his normal cocky voice, "Told you she had mad ninja skills."

Castle and Beckett looked at each other and shook their heads. Whenever they went undercover it would be fun.

After getting some more information from the two ME's the four of them went back to the bull pen.

Once they got there Ziva gave Abby the bullet and she got to work using her extensive field kit, which she had set up in the conference room, to run ballistics.

Gates walked out of her office and came to a stop by the group. Turning to address Beckett she asked, "You sort out Castle?"

"He knew the basics already," she nodded.

Gates nodded, "Good. So how about the three of you? You get the general jist of each other's skills."

Beckett, Tony and Ziva all nodded and Ziva said, "Beckett is a credit to the NYPD, she fights well."

Gates nodded and then turned to Ryan and the others, "Have you found anything about which gang he was running for?"

Ryan and McGee quickly nodded and McGee began to speak, "His phone's memory card was slightly damaged but we got off all the contacts and we've run them."

Ryan took over and said, "Most of the numbers were marine numbers or numbers for friends and family. There was however one that is the landline for a known biker hang out." Ryan paused and Gates gestured for him to continue.

Esposito carried on from where Ryan had left off and said, "Bikers Rest," everyone who was hearing this for the first time raised their eyebrows, except Castle who just smiled and kept in a chuckle. "Yes it's the real name. The gang that runs it are one of the worst in the city and they defiantly don't talk to cops. If it's ok with you Captain we'd like to send in Beckett, Castle, David and DiNozzo in tomorrow evening."

"Fine by me as long as they've got a wire and we know where they are at all times," as she said this she threw a pointed look at Beckett and Castle, "And it's alright with Agent Gibbs." At Gibbs nod Gates continued, "I know you have a bike detective but what about the others, do we need to pull three out of the impound lot."

"No Sir, Castle has his own and Agent David can't ride so she's going with Agent DiNozzo, which means we only need the one."

Gates nodded then said, "Ok. Go pick up the bike tomorrow morning and spend some time getting Agents David and DiNozzo used to it. Keep me in the loop." She finished speaking and walked back to her office, shutting the door behind her.

"Dude, since when do you have a bike?" Esposito asked, turning to look at Castle.

Castle opened his mouth to answer but Beckett cut across him, "You give him the same answer you gave me and I'll have you screaming apples."

Castle nodded then said, "Since I brought one." He took one look at Beckett's face and took a step back. In a defensive tone he said, "That wasn't what I told you."

Beckett scowled then shook her head at Castle antics before saying, "Castle your nine year old is showing."

Castle pouted but didn't say anything.

Tony turned to McGee, "We finally found something that I can do better than Ziva."

McGee took one look at Ziva's face and wisely decided not to answer. Ziva turned to Tony, "Keep this up Tony and you won't be able to ride either, I know at least five ways to seriously injure you with a paper clip and another six ways to kill you."

Gibbs took a step and slapped them both in the back of the head. "Shutting up boss," Tony said, a smile still on his face.

Castle then exclaimed, "I've got a brilliant idea, don't look at me like that Beckett, sometimes my ideas are good ones, how about everyone comes back to the loft this evening, that way Tony and Ziva can pick up their jackets and we can all get to know each other better. I'll even cook."

Tony and Ziva agreed quickly and Castle looked over and Ryan and Esposito and said, "Bring Lanie too Esposito." The boys agreed then Castle turned his gaze to Gibbs, McGee and Abby, who had come out to join them while her kit did its thing. Abby agreed with a bubbly yes while McGee said it would give him a chance to ask about his work.

Everyone then turned their eyes to Gibbs, who still hadn't answered. "Come on Gibbs, you have to know, everyone else is going."

Gibbs looked at Abby's pleading eyes and nodded.

Castle smiled then said, "Oh and bring Ducky along too, the more the merrier." He turned to Beckett, "See, I do have good ideas occasionally." Beckett just shook her head and went and sat at her desk. Castle went and got coffee for the two of them while everyone went back to what they were doing before, Ziva and Tony going into the conference room to see if they could find anything else out.

So the next chapter will be dinner at the loft.