Prompt: This is a story idea way back when the series first began and when Deeks was first introduced. Could you PLEASE write a story about everyone's reactions when they learn that Jason Wyler is actually undercover Detective Marty Deeks. It's always annoyed me we never saw everyone's reactions and I would also love it if we got a formal introduction too please.

A/N: So…a lot of this ended up being from Kensi's perspective, but I did get most the team's reactions in to some degree. I hope this is ok.

"This guy's a detective?" Sam repeated, addressing the tiny woman who had introduced herself as Henrietta Lange, instead of Deeks. His tone was definitely insulting. Now mostly over his initial shock of finding out that he wasn't the only one undercover, Deeks resisted the urge to say something particularly unpleasant and instead smirked at the other man. Agent Sam Hanna from some fancy pants Federal Agency.

"It's ok, don't feel bad. I've fooled a lot of people before," he responded, having a feeling it would tick Hanna off even more. He was right; Hanna made a derogatory noise, his expression disgusted, and jerked his thumb in Deeks' direction.

"I thought LAPD had a dress code. They must really be going downhill if they're accepting hippies off the street." Deeks huffed out an unamused laugh. Like he hadn't heard something similar a hundred times before. He expected a Fed to be cleverer than that honestly.

"I used to be a lawyer too," he told Hanna who looked appropriately aghast. "And before you ask, my hair was even longer." Deeks let his gaze flick up to Hanna's shaved head. He could easily see the man being ex-military. He had that holier-than-thou attitude that came from years of ordering other people around and assuming you were always right.

"Alright, enough chit-chat gentleman," Ms. Lange decided, stepping between them, her hands folded together. "We have work to do. And Detective Deeks should probably meet the rest of the team as well."

Deeks followed after them, figuring that he wasn't going to get anywhere by being too resistant. Besides, he was oddly intrigued by Henrietta Lange. And also a little intimidated and terrified. But he wouldn't mention that part.

"So tell me, who all is on this team?" he asked as Sam and Ms. Lange lead him to a shiny SUV. "And where exactly are you taking me?"

"The boat shed," Sam answered shortly, ignoring the first question.

"Ooh, sounds fancy."

"How about we keep the small talk to a minimum?" Deeks pursed his lips at the suggestion, thinking that Hanna was about to find out just how chatty he could be. He smirked again, biting back a chuckle. If this NCIS place could mess up his op, then he could certainly ruin their day.

"Wait, how did LAPD get in on this?" Callen asked and Kensi perked up, wondering what Hetty was telling him. He sounded vaguely annoyed. "Ok, yeah, we'll be at the boat shed." Hetty had called Callen about five minutes ago with an update and there'd mostly been silence on his end. She waited impatiently for him to hang up.

"What was that about? Did Hetty get Sam out?" Callen chuckled at her questions, shaking his head as he slipped his phone into his back pocket.

"Yep, Sam's out. And apparently Wyler got released too."

"What? But, he attacked Sam," Kensi said, wondering just what kind of criminal Jason Wyler was that he had strong enough connections to get out of jail after assaulting a federal agent.

"Turns out Wyler is actually some kind of undercover cop. Martin Deeks, Hetty said," he explained with a frown.

"You're kidding." Kensi had known there was something off about Wyler, but a cop?

"Unfortunately I'm not. I'm gonna text Eric and see what he can dig up on this guy now that we have a real name."

Kensi waited a few minutes and then peered over Callen's shoulder, trying to read his texts.

"What did he say?"

"'That makes a lot of sense. I've got a whole file on a Detective Marty Deeks. Looks like he's a good cop, but whoever sets up his backstopping needs to be fired,'", Callen read off and Kensi rolled her eyes.

"And?"

"He said to send Deeks over when we're done so he can give him a "real" alias. He's worried about the guy getting marked."

"Eric hasn't even met him yet," Kensi protested, annoyed.

"You know Eric. He can't resist the chance to geek."

About 30 minutes later, Hetty, Sam and Detective Deeks walked in. Hetty led the small group and had the barest hint of a smirk tugging at her lips as Sam walked behind her, his expression stony and impassive.

Deeks stopped in the doorway, glancing around with a vaguely impressed look. He spotted Kensi, one eyebrow rising briefly, and she crossed her arms defensively. If he was surprised to see her there, he didn't show it. He winked at her, then practically swaggered the rest of the way into the room like he owned the place.

Hetty cleared her throat and gestured to him.

"Everyone, this is LAPD Detective Marty Deeks. Detective, these are Agents Callen and Kensi Blye." She smiled in a satisfied way and added, "Play nice." Without another word, she left.

"Deeks," Callen acknowledged him. "Why don't you take a seat?" Deeks raised an eyebrow at the clear attempt to control the situation but sauntered over to the table, hooked his foot around a chair and sat down in an insolent manner.

Sam followed the movement, his face remaining impassive, but Kensi thought she saw a hint of animosity. That was unexpected. From what she'd experienced, he usually didn't let his emotions show unless it was a particularly personal case. Apparently Deeks rubbed everyone the wrong way.

With a little prompting, Deeks explained his plan to get Sam arrested and keep him out of the gym, and effectively out of LAPD's way.

She was vaguely impressed by his skills and ingenuity, but brushed that thought away. He was pretty good, but not as good as them. Plus, she'd known something was off about him immediately, she'd just been wrong about the root cause. Kensi also silenced the voice that reminded her that he'd been suspicious of her as well.

Deeks helped himself to some coffee, again making himself at home as he smiled cockily and joked, easily guessing their set up at the mission. Kensi resisted the urge to laugh as he teased Sam and Callen. It wasn't good-natured teasing either, any more than their comments to him were well-meant.

Clearly he disdained them. Good, she didn't like him either. He was full of himself, too self-assured, scruffy, and unkempt. Blue-eyed and blonde, the voice in her head supplied helpfully.

Shut up, she told it firmly. Callen and Sam were wrong. She did not have a thing for him. He was a mediocre cop who'd obviously gotten in over his head. He glanced her way, that sarcastic, half-flirty smirk in place and she stared back at him, hoping to unnerve him. All she got in return was a smoldering look, his blue eyes daring her to look away first.

Despite herself, she couldn't help but feel a little bad that they were hijacking Deeks' case. He'd spent months on it and now they were taking over without any remorse.

"You know, you never answered my question," Deeks said a while later as she escorted him from the building. "Are there really r-rated photos of Special Agent Kensi Blye floating around somewhere?" Kensi glared at him and said the first thing that popped into her head.

"In your dreams." It wasn't particularly brilliant, but Deeks grinned nonetheless and said,

"Gladly."

"I could take you down right now," she threatened mildly, but he just kept smiling, clearly not intimidated by her in the slightest. It pissed her off. And intrigued her. Damn him. She would not be attracted to this scruffy, surfer dude.

"I bet you could," he murmured as they stopped in front of his car. "See you around Agent Blye." He winked at her again before he slid into his car and drove off.

"I don't like him," Sam said coming up behind her with Callen by his side.

"At least he's on our side," Callen pointed out. "It would be a lot more annoying if he was actually a criminal. Let's just hope he stays out of our way for the rest of the case."

"And once we close the case won't have to see him ever again." Kensi said, not sure why she felt a hint of regret at the thought. She was definitely not smitten.

"Thank god," Sam said. "Cause I think I'd end up shooting him if I had to listen to his rambling for more than a few days."

A/N: Hopefully this is ok. I really played on that fact that none of them got along super well at first.