Okay, so this is my first NCIS fic, and I'm sort of scared to put it up here, on account that I haven't seen every single episode, but I've seen most. So yeah, here it goes! I'm a little scared.

Oh, here's the summary:

Gibbs believes that there is something going on between Tony and Ziva, so he decides to set up surveillance to watch them, but are they really breaking rule number 12? And why is Gibbs so against co-workers dating each other?

Disclaimer: I do not own NCIS

Jethro Gibbs sipped his coffee as he strode into the elevator, pressing the button, while taking another sip. It dinged, signaling the closing of the doors, and it moved. He stood in silence, staring at the gray metal that gave a blurry reflection of himself back.

The case that they were currently working on, the murder of a Lieutenant Shawn Marshall, wasn't going anywhere near planned; Abby hadn't collected any fingerprints from the pieces of evidence they found at the scene of the crime; a pair of car keys, a wallet with drivers license and credit cards all issued to the lieutenant, and a cell phone. And, to make this case even harder, Ducky was having trouble finding the bullet, even though there was no exit wound.

He sighed as the elevator dinged open. He strode over to the bullpen, his ears open, trying to catch a hint of what Dinozzo and David had been so secretive about over the last couple of weeks.

His eyebrows went up in surprise as he realized two of his three agents weren't sitting at their desks like they normally were. McGee was avidly typing something on his computer, "Morning, boss." He said, glancing up at him as he returned back to typing.

Gibbs nodded his head and then went over, setting down his coffee onto the table, "McGee, you don't happen to know where DiNozzo and David are today, do you?"

McGee looked up and shrugged, "Late, I guess. It's normal for Tony to be late, but not Ziva."

Gibbs frowned as he turned around to go and grab something out of his drawer. The elevator dinged, and he heard the running of feet. He turned around and spotted his two agents, trying to run and sit down into their desks before he noticed they weren't there. He smiled, rather smugly, but let it fall as he studied the two agents.

Ziva's hair looked like she hadn't bothered to comb it for weeks, her clothes looked hastily put on, and her eyes were accompanied by a pair of dark circles. She obviously hadn't slept well, in fact, she looked deathly tired every day. Gibbs hadn't wanted to say that he was rather concerned for one of his agents, but now, he believed that it was getting serious.

Tony looked fine, normal for Tony DiNozzo, but what really startled him was the fact that Ziva's hand was clasped tightly in Tony's.

"It's about time you showed up," Gibbs said as Ziva dropped Tony's hand like it was a hot plate, scooting a step or two away from him. Jethro moved towards the two, his hands clasped behind his back, "Care to enlighten me, DiNozzo, as to why you two were late?"

Tony let out a laugh, "Funny story, actually, boss, my alarm clock didn't work, and apparently neither did Ziva's, so I offered her to give her a ride because her car was in the shop…big surprise there. With her driving, half of DC's cars should be in the shop!"

Ziva glared at him, "Do not forget, Tony, that I know 18 different ways to kill you with a paper clip," She threatened, and he smiled at her. He was going to continue with his story when Gibbs stopped him.

"Are you sure that you two weren't using the same alarm clock?" Gibbs asked, his voice low as he watched Ziva and Tony's faces heat up, as if they had been caught red-handed.

"No!" They both said at the same time, almost yelling. McGee, who had decided to stand up and figure out what Gibbs was talking about, let his eyes widen at his two colleagues. Ziva and Tony both looked at each other and then frowned before moving past Gibbs and taking a seat behind each of their desks.

Gibbs raised his eyebrows, looking between the two, who were both typing at the computer, trying to look occupied, "McGee!" He called.

"Yeah, Boss?"

"Go back down to Abby and see if she has any new information, then report back to me. I'm going to go see Director Shepard," McGee nodded his head and started towards the elevator, the ding sounding as he watched the doors close in front of him before he started towards the director's office. He climbed the stairs and kept staring down at Ziva and Tony. They continued to type on the computer, Ziva glancing up at Gibbs every other step he made. There was something up with them, there had been for the past two weeks. The last case that they had, with the Petty officer, had taken them almost twice as long to complete because Ziva and Tony were not alert during it; they were distracted. They were obviously hiding something, and Gibbs was determined to find out; the undercover way.

He stopped in front of the Director's door and then knocked once before opening it up and walking in.

Jenny sat at her desk, scribbling something on a sheet of paper. She looked up and smiled, "Good morning, Jethro,"

"Morning, Jen. Listen," He sat down on the couch, "I need your help."

"Anything," She smiled, standing up and pouring them each a shot of whiskey. Gibbs took it, but didn't drink it as he placed it down on the table in front of him.

He sighed, trying to piece it all together. Was it really necessary? Did he really need to know if his agents were actually breaking the rules? His rules? He moved forward, resting his elbows on each of his knees. He looked up at Jenny, who was still smiling, but a little confused at the same time, "I need to put two of my agents under surveillance."

She immediately became alert as she quickly set down her glass and the crystal flask that contained the liquor, "Does this have anything to do with the murder?" She let out a small gasp, "Is one of NCIS part of this?"

"No," Jethro sighed, "Jen, it…it has nothing to do with the case."

She smiled as she understood, "Oh, Jethro. This is about DiNozzo and David, isn't it?"

He looked shocked as he nodded his head, "They're hiding something from me, Jen."

"Then they obviously have a good reason," She stood up and grabbed the untouched glass in front of him, dumping the contents into the sink and placing the crystal flask back onto the shelf where it belonged.

"There are reasons that I created those rules, and they're not supposed to be broken."

She stopped and turned around, smiling, "You broke one of those rules, a long time ago, Jethro, do you remember?"

Gibbs nodded, "I remember," His tone was soft, but he quickly changed the subject, "Jen, please, let me put them on surveillance."

"Is this really…"

"Yes," He interrupted, catching her off guard, "It is necessary."

"I'll send someone to implant a camera into the apartment." She sighed, shaking her head. She always caved for him so easily. Gibbs started to turn around and walk towards the door when she stopped him, "Jethro?" He froze, turning around in his tracks.

"Yeah, Jen?"

"Ziva's or Tony's apartment?"

"Ziva's." Gibbs smiled, "Thanks, Jen."

"Your welcome, Jethro." And with that, he left the room, closing the door softly behind him.