Zoë hardly had time to react after she had opened the door. She was surprised to see Callen standing at her door at this time let alone him kissing her like this.

Callen kept kissing her as he pushed the door close with his foot. After everything that had happened over the last few days he just wanted to spend time with Zoë and let her know how he really felt about her.

"Cal… Callen," Zoë tried to speak in between the kisses. After a minute or so she managed to push him away so she could speak. "What's going on Callen?"

Callen cupped Zoë's face and made sure she was looking at him as he looked her right in the eyes. Zoë looked back into his and she had never seen his eyes bluer than right now.

"I… It's just…." Callen tried to find the right words. "I think I love you." Zoë looked at Callen as he spoke those words. Was he really telling her he loved her? Callen released her face. "I know it's not rational or anything but I've really enjoyed the time we spend together and after everything that had happened recently I starting thinking about what if it had been you who had been hurt, what if Janvier had come after you. What if it had been you in the hospital instead of Sam or Deeks, or if Sidarov had put a gun to your face like he did with Michelle. I couldn't handle that. And I starting thinking and it dawned on me how much I liked the time we spend together and I couldn't imagine going a day in my life without you. And it was then I realized that I love you."

Zoë looked at Callen as he spoke and she could see that he was being sincere, that he really meant what he was saying, that he really loved her. Knowing Callen's past and all she knew it wasn't easy for him to admit this, to say that he was in love with someone. And he was in love with her.

"Please, say something," Callen said after Zoë didn't speak right away after he was finished, hoping he hadn't scared her away by admitting he loved her. Perhaps this wasn't a good idea, perhaps she didn't feel the same way about her. Callen was about to turn around and leave when Zoë grabbed him by the arm.

"Don't, don't leave Callen. I… I love you too," Zoë admitted. And she did. She really loved him.

With a smile on his face Callen pulled Zoë closer and kissed her again. For the first time in his life he felt truly happy. She loved him as well. Perhaps there was a chance for him at a somewhat normal life.

"You really mean it?" Callen asked as he rested his forehead against Zoë's forehead.

"Yes, of course I do. I love you."

"Good, cus I love you too. I've loved you for a while now but I was afraid to admit it to myself, afraid I would just get hurt if I'd let you in."

"I will never hurt you Callen, I promise you. I'm not gonna leave you," Zoë said and she made sure Callen understood every word of it and knew that she meant it.

Callen kissed her again and he picked her up. Zoë automatically wrapped her legs around his waist as Callen pushed her against the wall. Their kisses were passionate and hungry, finally admitting how they really felt about each other. Callen moved his hand up under her pajama top. Zoë moaned against his lips as she felt his hand on her bare skin. She broke away from the kiss and put her feet back on the ground. Callen was wondering what was going on and he was about to protest when Zoë grabbed his hand and pulled him further into her house, towards her bedroom. Once they were in the bedroom Zoë closed the door and Callen pulled her to him again, kissing her again. As they were kissing Zoë's hands started to undo the buttons of Callen's shirt, removing it completely once she had finished the last button. In the meantime Callen had kicked off his shoes. Callen followed suit and took Zoë pajama top off, momentarily stopping their kissing so he could take it off. Zoë hands fumbled with his belt and zipper as Callen lowered her onto the bed.

Zoë couldn't believe this was actually happening but the way it felt, it was so good already. Callen removed his lips from Zoë's and kissed down her neck, kissing her at her pulse point. Callen could already feel the heat radiating from her body. It was clear to him that she wanted this as much as he wanted this. He had never felt so much passion for someone before, this was way different than the previous sexual encounters he had. He didn't love any of them, but Zoë he really loved and he already felt the difference. It would be amazing, he was sure of this.

Callen kissed down her body and removed all of her clothes before kissing her on the lips again. Zoë turned them around and removed all of Callen's clothes. She looked at the scars he had on his torso and she moved her hands over it.

"From your shooting?" Zoë asked.

"Yeah."

Zoë kissed his chest and paid special attention to his scars. Callen never felt so loved in someone's arms before. Not wanting to wait one more second Callen turned them around. He kissed Zoë as he joined them. It felt so good as Callen starting moving. It felt even better than they both had thought it would. It was so amazing, all the pent up sexual energy they had towards each other was coming out. Zoë's nails were digging into Callen's back but Callen couldn't care less, for the first time in his life he was really making love.

Two hours later they lay in each other's arms, relaxing after their amazing love making. Zoë had her head on Callen's chest and her arm draped over his chest and Callen had his arm wrapped around Zoë.

"Wow," Zoë spoke after she had regained some of her breath.

"That's all you got huh?" Callen teased with a smile.

"Yeah, wow sums it up quite correctly. It was amazing."

"Yeah it was. I'm glad we did this."

"Me too." Zoë lifted her head up and gave Callen a kiss. "I love you G."

Callen looked at her as she called him G. It sounded so beautiful coming from her lips.

"I love you too Zoë."

Zoë gave Callen another kiss before she nestled herself against him again and fell asleep not much later. Callen was awake for a while. He was really glad he admitted to Zoë how he really felt about her. And the good news was that she loved him back. And now here he was, naked in Zoë's bed with her sleeping on his chest after just having made love. Perhaps there was a chance at happiness. After a few minutes Callen fell asleep as well and he actually slept through the entire night.

"Good morning," Zoë spoke surprised as she walked into the kitchen and saw Callen sitting at the kitchen table, drinking coffee and reading the newspaper. When she woke up and saw that the bed was empty she half expected him to be gone.

"Good morning, there's fresh coffee if you'd like," Callen replied.

"Thanks." Zoë grabbed some coffee and cereal and joined Callen at the table.

"About last night…." Callen started as he put down his newspaper.

"I have no regrets if that's where this is going."

"No it's not, and no I don't have regrets either."

"Good."

"It's just, where do you we go from here? Are we really gonna give this relationship a chance?"

"I'm more than willing to see where this leads, I think it can be something wonderful."

"Yeah I think so too and we've been dancing around this for a while now so last night was bound to happen sometime. I'm just not really sure what's gonna happen next, I've never really been in a real relationship."

"We'll just take it one day at a time and see where this goes, no pressure. But what about work? I'm not sure Hetty's gonna like it that two of her team members are in a relationship."

"We just have to be professional at work and show her we can work together and be in a relationship."

"I think that's not gonna be a problem."

Callen leaned over to give Zoë a kiss but he was interrupted by his phone ringing. Callen sighed and answered his phone.

"Yeah Eric?"

"Hetty needs everyone in OPS."

"Yeah, I'll be right there," Callen replied and hung up the phone.

"We got a case?"

"Yep, Hetty needs everyone in OPS."

"Guess we better get going then."

Callen gave Zoë a soft kiss before they got dressed and drove separately to work.

"What do we have Eric?" As Callen walked into OPS.

Zoë had walked into OPS a minute earlier already, the others were already there.

"Earlier this morning a body was found at the beach near Carlsbad." Eric spoke as he put an ID up on the screen. "Carlsbad PD id'd him as Dr. Evan Stone, he was a doctor at Camp Pendleton, which is when they sent it through to NCIS."

"A doctor huh? What was his specialty?" Kensi asked.

"He was a psychiatric at the base there," Nell answered.

"Foul play or accident?" Sam wanted to know.

"They haven't officially put out a cause of death but early determinations suggest it was foul play. There's a bullet hole on his chest."

"It could be that he found out something in his sessions he wasn't supposed to," Zoë interjected.

"We have to go look through his files and talk to his most recent patients," Callen said.

"That's not gonna be that easy," Zoë said. "As long as there's no real evidence that someone at the base killed him they are not gonna let us go through the files, doctor-patient confidentiality."

"Unfortunately Ms. Moore is correct," Hetty spoke as she walked into OPS. "Which is why Ms. Moore will go in to fill in for Mr. Stone."

"What?!" Called yelled at her. "Zoë is not trained for field work. It's dangerous for her with a possible killer walking amongst her patients."

"It's not a cartel, Mr. Callen."

"I can handle it," Zoë spoke.

"And you and Mr. Hanna will be close by," Hetty told Callen.

"Fine," Callen gave in, after he realized there was no arguing with Hetty but he didn't like it.

"Ms. Jones, please make sure Dr. Moore has the right credentials." Since Zoë was already a psychiatric within NCIS they could just use her real name. "You will leave right away Ms. Moore."

"You got it Hetty."

Zoë left to go grab her things in her office and Callen followed her.

"Zoë, a moment please," Callen spoke and Zoë stopped and turned around to him.

"I'll be fine Callen, I can handle this."

"Just come with me for a moment."

Zoë followed Callen towards the armory. Callen grabbed one of the guns and took Zoë into the shooting range.

"I don't need a gun Callen."

"Just in case it's necessary. I would feel much better if you at least knew how to shoot one."

"Alright," Zoë gave in, a part of her was glad that Callen was worried about her.

Callen loaded a magazine of dummy bullets into the SIG.

"You hold it with your dominant hand around the handle and your index finger on the trigger and then place your other hand underneath the base of the handle for extra support," Callen demonstrated to her before he gave her the weapon.

Zoë felt a bit weird holding the weapon in her hands, she had never held a gun before. It felt heavier in her hands then she had imagined. She held the gun just like Callen showed her. Callen adjusted her hands a bit to make sure she was holding it correctly. Despite them just having made their relationship sort of official Callen was very professional about this. That was one of the things Zoë liked about Callen. He was a great special agent.

"Now point it toward the target, keep the gun at eyesight height." Callen stood close to her, helping her and putting her in the right position. "Now make sure you can look over to barrel to the target, imaging you hitting it. When you feel like you're ready, pull the trigger. Take a deep breath, focus."

Zoë took a deep breath and focused on the target just like Callen told her. When she felt like she was ready she pulled the trigger. The blowback was a bit harder then she imagined and the gun fell out of her hands on the table, but she did managed to hit the target, even though it was just in the arm.

"Not bad for a first try," Callen told her.

"I'm so not good at this. This is more your thing."

"I know, and normally you wouldn't have to shoot but since you're going undercover I want you at least to be able to know how to shoot a gun so you can protect yourself, should that be necessary. Let's try again."

Zoë picked the gun back up and lined up the target again. She held the gun more securely in her hands, making sure it wouldn't drop again before she pulled the trigger. She was still a bit shocked by the blowback but she managed to hold the gun in her hands. Her shot ended up on the target's shoulder.

"See you're getting better."

"I still don't feel very comfortable with this but if it'll make you feel better I will do it for you," Zoë spoke as she turned to face Callen.

"That's all I ask and it's only for emergencies, if you should really need it. Sam and I will close by so if there's anything we'll be right there."

"I'll be fine. I've got this."

"Yes you do."

Zoë practiced until the magazine was empty. Before giving her the gun Callen showed her how to change the magazine. Zoë took the gun that Callen gave her with real bullets and loaded everything up before driving to Camp Pendleton. Callen and Sam followed her at a distance. Kensi and Deeks followed to, they went to the scene where the body was found. Zoë arrived at Camp Pendleton and was stopped at the gate.

"ID please," a friendly guard asked.

Zoë pulled out her credentials Eric gave her and handed it to the guard. "Dr. Zoë Moore, I'm filling it for Dr. Stone."

"Ah yes, it's tragic what happened to him."

"Do you know what happened?"

"Just what they say in the news."

"I just hope they find whoever did this soon."

"You and me both." The guard handed Zoë her ID back. "All checks out. Just drive on ahead and follow the signs towards building P, that's where your office is. I will call ahead that your coming and someone will meet you there."

"Thank you, have a nice day."

"Thank you, you too ma'am."

Zoë took her ID and followed the signs towards building P. Callen and Sam pulled up to Camp Pendleton a little later and went to the MP office on the base there, they would keep watch from there.

Zoë parked her car in the parking lot, grabbed her bags and went inside.

"Good morning, you must be Dr. Moore," a friendly woman greeted Zoë as she stepped inside the building. "I'm Dr. Maggi Newton, head of this department."

"Yes, please call me Zoe. It's nice to meet you. Although I wish it were under different circumstances, I'm sorry for what happened to your colleague."

"Thank you. It's terrible what happened to Evan. Let's hope they can find out what happened. Come on, I'll show you to your office so you can get settled in. I hope you're ready to dive right into work. Evan has appointments all day today and I would like to keep those, there are a few who really need weekly counseling."

"Yes of course, no problem."

Maggi showed Zoë to her office and showed her were everything was and were the files for her most recent appointments were.

"I'll leave you to get settled in, your first patient comes in an hour. If you have any questions my office is down the hall."

"Thank you, I'm sure I'll find my way."

Maggi left and Zoë first swept the office for any bugs with a device Eric gave her, in case somebody was listening in. After not finding any Zoë looked through the file of her first patient.

For the rest of the day Zoë saw Stone's patients and helped them as best as she could. Some were a little hesitant with a new shrink but overall it went fine. From the patient she saw today she didn't get a feeling that one of them had anything to do with Stone's murder. When her last patient of the day was gone Zoë sat behind the computer and started looking into some things that could perhaps contain something about Stone's murder.

"Callen, Sam, are you there?" Zoë asked as she pressed the earwig.

"Yeah, we're here. Have you found something?" Callen replied.

"I'm looking through the files on his computer and the calendar with all his appointments. I haven't heard anything about him missing any appointments and according to his calendar the last appointment he had was the day before yesterday at 9pm with a petty officer Rick Barnes. Yesterday he had no appointments. According to his calendar he had a day off."

"Kensi and Deeks spoke to his wife and she said that he went off to work yesterday morning just like he always did," Callen replied.

"Hmm, well he didn't go to work. I asked here and nobody saw Stone here yesterday and because it was his day off they didn't think anything off of."

"So why would he tell his wife that he was going to work while he has a day off?" Sam questioned.

"I'm not sure. Maybe he had an off the book session with someone. I'll send his calendar through to Eric and Nell and they can check out this Barnes guy."

"That's good. Anything else you found out?"

"No nothing yet so far, I haven't found anything in his notes yet that would lead to him being killed but I'll keep digging, perhaps there's something there."

"Alright. We'll be right here if you need us."

"Thanks."

Zoë looked through a few more things before calling it a day. She went to an apartment nearby, which Hetty had rented for her. Callen, Sam, Kensi and Deeks stayed at the same apartment building in a different apartment. The apartments where next to each other and had a door inside which led to the other apartment. Once inside Zoë went to the other apartment to see what the other had found out. So far there wasn't much to go on. Not that many leads just yet. The ME did determine that Stone was killed somewhere early yesterday morning, right after he left for work. Eric and Nell were busy looking at traffic cams to see where Stone went after he left the house but not everywhere in the area were cameras.

…

It was day three of the undercover operation. Callen didn't like it that Zoë was still undercover. She did very well but Callen still would feel better once this operation was over and Zoë was out of harm's way. Zoë had just finished the day and was wrapping up at the office. The four agents were at the MP's office looking over the evidence they had gathered so far and kept an eye on the security cameras.

Zoë was about to pack her bag and go home when the lights in the building went out. Callen was looking at the cameras and the cameras all went black as well.