A/N: A massive thank you to everyone who reviewed and provided C&C on my first chapter - it is all appreciated and it will help me grow as an author. I also appreciated the storyline ideas - I would be really grateful if anyone had any ideas of things they would like to see develop in the story, because I want you all to feel that you are as much a part of this fan-fic as I am! Anyway, here is chapter 2 for you all to enjoy. I've proof read it several times and streamlined it to my liking, so please, enjoy :-)

DISCLAIMER: I am in no way affiliated with NBC's Chuck or anything else featured in this fan-fic. All I did was write the story for fun, honest...

Chapter Two: Enter Agent Walker

2 Weeks Later

Grand Plaza Apartments

Washington D.C.

8:56 pm

Ping!

Casey looked up from his seat momentarily at the microwave, which sat facing him on the counter. The small monitor on the corner of the machine flickered excitedly – Chow time, Casey thought, and he folded the newspaper he was reading neatly in half, placing it on the armrest, before standing up and walking over to the kitchenette.

The NSA had kept him holed up in this apartment for almost half a year now, sending him on various assignments, but it was the closest place to home he could think of. It was more than the bare essentials he'd been used to; the living room sported a large cream sofa and matching armchair and a large flat screen television stood proudly in the corner. On the wall he had mounted various rifles and machine guns of historical significance, but for the most part the apartment was fairly regular.

Wrenching open the microwave, Casey extracted his ready meal (in this instance a rather plastic-looking lasagne) and pulled up a chair to eat at the countertop. The dull scrape of the wooden legs on the carpet was the only thing disturbing absolute silence at this point, which was the way he liked it. It meant he was completely alert, with no ambient noise to distract him from any would-be intruders.

He mounted a military-scale operation on the lasagne, fork attacking the meal at all fronts, his stomach slowly consuming the pasta-based dish's resolve. He looked up briefly just as the flat screen activated, and General Beckman appeared in all her high definition glory.

"Major Casey." Beckman stated.

"General," Casey returned, pushing his meal aside with some haste, "have you come to a decision yet?"

"Regarding your...unique situation?" Beckman asked, continuing only when Casey nodded in approval, "Yes. We have."

Casey grunted in support.

"Peyman Alahi," the General stated, before an image of the man appeared on screen, "an international financier for the opium cartel. He has in his possession an item which the DEA are...fond...of tracking down."

"Forgive me for asking, General," Casey interrupted, "but what does this have to do with the Intersect?"

"Everything, Major Casey. We believe someone with your abilities could be invaluable on this mission. You will assist the DEA agent Carina Miller in—"

"—Hold on a second General – Carina? I've had dealings with her in the past, she can't be trusted."

"We are fully aware of Agent Millers...unorthodox methods, but a field agent with your experience should find her to be nothing you can't handle."

Casey expelled a humoured grunt.

The General cleared her throat in return, before carrying on: "You will assist Carina in acquiring the item from Peyman's Malibu estate."

"What exactly is the item, General?"

"A diamond. A diamond the Drug Enforcement Administration would much rather was in their possession. Make no mistakes Major Casey, we want that diamond first. Understood?"

"A diamond, huh? I don't like the idea of going after that diamond alone with Carina."

"That brings me on to my next point. You won't be alone, Casey."

"Hmm?" Casey replied, curious.

Before General Beckman could reply, Casey heard the distinct sound of someone unlatching the front door. The door swung open, and an ominous shadow stepped inside. Casey's blood pumped furiously in his veins, and he reached for the fork which was currently embedded in his lasagne.

With one deft toss, he sent the fork flying at the mystery intruder, whilst simultaneously diving for cover behind the couch. The intruder stepped into the light and caught the fork clean in her hand, a smug look on her face.

The General raised an eyebrow, and generally appeared unimpressed by Casey's culinary assault.

"Agent Walker," she greeted, "just in time."

Casey's mouth distorted into an angry sneer.

"General," Agent Walker replied, "I trust the CIA has cleared everything with you?"

"I've been briefed on everything relevant to this assignment," Beckman replied, before turning her attention back to Casey, "Major Casey, meet Sarah Walker, the CIA's top—"

Casey's vision flickered, then burst with information – an intelligence file on one SARAH WALKER; details of her previous missions; archived photos; grainy CCTV footage. The footage showed Sarah assaulting and dispatching a group of guards, before turning around, her eyes piercing the camera. She fired her pistol at it, and the footage ended.

Casey blinked several times, in a vain attempt to stop his fiery headache in its tracks.

"—Sarah Walker, top CIA agent, known alias: Jenny Burton, previous missions in Pakistan, Canada, and most recently Paris. Recruited by the CIA out of high school, pressed into field work at the age of eighteen."

"I see you have...become familiar with Agent Walker, Major." the General deduced.

"Oh," Casey added, remembering the CCTV footage, "and skilled at hand to hand combat."

Sarah walked over, and motioned for a handshake. Casey hesitated for a moment, before grunting slightly and holding out his hand, deciding she posed no imminent threat to him.

"Major Casey," she began, "I have been fully briefed on your new found abilities and I will be assisting you in this operation."

Casey nodded once to confirm. He didn't trust her – she was CIA, after all. Her warm smile was lost on him, although he was impressed at her quick reactions when she was faced with an airborne item of cutlery. But he'd never tell her that.

"I will allow you both some time to get acquainted," the General finished, "Major," she nodded to Casey, before eyeing up Sarah, "Agent Walker."

2 Days Later

Richmond Hotel Complex

Malibu, California

7:12 am

Casey's eyelids creaked open reluctantly, and he groaned as he sat up. His brain clearly wasn't taking well to the Intersect intrusion, as every inch of his head ached with a fury unmatched by even the most brutal hangover. Within a matter of seconds, however, his soldier mentality kicked into action, and he got up immediately, eyeing up the hotel room with the scrutiny of the toughest drill sergeant. As he inspected a window particularly vulnerable to a flanking strike, a knock rang out from the door.

Casey looked down at himself – he was wearing a plain white t-shirt and a loose-fitting pair of shorts. It would have to do, he told himself, before approaching the door and squinting, with one eye over the peephole. It was Sarah.

Hastily, Casey pulled open the door several inches, stopped by the security chain which linked the door to the wall. Craning his neck around and through the gap, he did a visual sweep of the hallway. Satisfied there was no one in the vicinity, he unlatched the chain and allowed Sarah just enough time to enter before slamming the door shut.

Casey observed her with great mistrust – their 'time to acquaint' the other night had been little more than forced small talk and pointless discussions about a plan of action regarding the diamond. It had also been stifled by the fact that she had been romantically engaged with the man he'd killed just weeks before, which made the overnight flight to California even more awkward. No. She was too...emotional for his liking.

"Casey," Sarah started, "I just spoke with the CIA Director. They just received intel that Peyman plans to move the diamond within the next 72 hours. If we make a move, we make it now."

Casey nodded, taking his Glock from the sideboard and chambering a round.

"When do we meet up with Carina?" he inquired, inspecting the gun's magazine.

"In ten minutes. She'll be waiting by the hotel bar," Sarah explained, before noticing Casey's lack of attire, "you might want to get changed before then."

Carina was indeed waiting at the bar, dressed in relatively little. Just like Casey remembered her, in fact. She saw Casey and Sarah approach, and a grin spread across her near-perfect face, her red-brown hair flaying slightly in the breeze.

"Sarah," she acknowledged, "I didn't know you were bringing Casey to the party."

Casey discreetly tapped Sarah's shoulder, and she immediately slowed, allowing Casey to whisper in her ear.

"Does she know?"

"About what?" Sarah whispered back.

"The Intersect!" Casey hissed.

"No." Sarah returned.

Casey smiled coldly at Carina and the two sat down beside her.

"So what's the plan?" Carina pressed.

"Ah...we were hoping to go over it together." Sarah replied.

"Really? I thought you'd have this all figured out, Walker."

"Well he is hosting a party at his estate today. I suggest we blend in, and slip away to extract the diamond before escaping." Sarah retorted.

Casey grunted, clearly humoured. If only it were that simple, he thought.

A/N: Thank you for reading! I will have the next chapter up soon, I promise. Please, feel free to review, critical or in praise, everything really inspires me to write more proficiently in the future!