When Liz walked into the Post Office that Tuesday morning, something was off. She could sense it.

She entered into the office she shared with Ressler and saw his briefcase on the desk, next to his keys, but there was no sign of him.

"Agent Keen", Aram said as she spun around facing the doorway where he was standing.

"Cooper needs you in his office, STAT." She watched him turn away, not sticking around long enough for her to ask any questions.

Keen put her coat down and made her way up to Asst. Director Cooper's office while she wondered in her head why the office was relatively empty and why she was being called up to Cooper's office so early.

The Blacklister case they had been working on for the past few days was a tough one. Red had given them the name of a seemingly normal American doctor. He had a wife and three kids, lived in the suburbs, paid his taxes and his patients loved him. But according to Red, he used his cosmetic surgery practice as a front to hide more sinister acts. Apparently, Dr. Max Mario was in the business of performing illegal medical procedures on patients who paid a high price for face alteration.

At first, Liz wondered why Red had brought him this case. There were probably thousands of doctors across the world who weren't exactly doing "ethical" medical procedures. But according to Red, the good ol' doctor had recently made a habit of creating new faces for criminals who needed to change their appearance in order to avoid capture. And one of those criminals, just happened to be on the Feds Top Ten Most Wanted List.

Liz got to Cooper's office and noticed a new face through the blinds before she stepped inside.

"Agent Keen", Cooper said with a hard smile. "Glad you could join us this morning."

Liz shot a look at Ressler, who was standing in the corner, avoiding her gaze.

"Meet Agent Elizabeth Warren from the FBI's CounterTerrorism division", Cooper said while looking over to petite, blonde woman standing next to Ressler.

"Agent Warren will be assisting us on our case from here on out."

Liz looked over from Agent Warren to Cooper, dumbfounded by what she was hearing.

"Sir… We don't normally get any assistance from other agents on our cases….", Liz said without mentioning Raymond Reddington's name and the fact that their task force was built around one of the men Agent Warren was tasked to find and jail.

"I know, Agent Keen, but Agent Warren has been briefed on our task force and can provide much assistance when it comes to Dr. Mario and the reason why he is someone we need to locate and put away."

She saw Ressler look over at her, his face reflecting the same expression she occupied.

Liz nodded to Cooper and reached out to shake Agent Warren's hand.

"Well, then", Liz said. "Welcome to the team."

…

Ressler walked down the stairs from Cooper's office, feeling the hard stare from his partner who was walking a few steps behind him. He watched Agent Warren make her way over to Agent Navabi's desk and felt an arm grab him from behind and pull him over to the side.

"Ressler, what the hell is going on?" Liz stared at him, just a few inches from his face, trying to keep her voice low. "And why didn't you tell me that we should've been here earlier?"

A smirk rose on Ressler's face. "Liz, it's not my fault that you aren't a morning person."

Liz hit him in the arm. "I'm serious, Ressler. When the heck do we just open our task force and our work to other agents we know nothing about?"

Ressler studied her face before he spoke again.

"I've known Agent Warren for years. She's a good agent, Keen. And apparently she has been trying to take down this Dr. Mario for years. She knows all about how his operation works, the tactics he uses."

"Well how good could she be if she hasn't been able to bring him down?"

Ressler laughed.

"You could say the same about me, Keen. I hunted Red for 5 years and never caught him until he walked through the front door…"

Liz looked away, a bit ashamed at making that comment to Ressler.

"Come on…. Let's hear what she has to say about our Blacklister", Ressler said as he walked away from her.

Liz walked over with Ressler to the middle of the room where Agents Navabi and Warren were standing and starting to discuss the case.

"Look… this guy is good. I mean, really good", Agent Warren said. "I've been gathering information on him for years, ever since he started realizing that criminals pay a heck of a lot more than regular patients."

"We found out about his practice when one of the members of a covert underground terrorist organization was found dead, only identified by his DNA."

Warren stopped and had Aram pull up a picture of the terrorist.

"Here is the last known photo we had of him… And here is what he looked like when we found him dead."

Liz & Ressler watched as a morgue photo showing a completely different face showed up on their screens.

"Dr. Mario commands top dollar for his services. And somewhere along the line, he started realizing that criminals pay ten times more for his work than regular customers."

"Okay, so what now?", Liz asked. "You said you've been tracking him for years without success. How do we get the information we need?"

"Well, actually I think we may be able to use some of Agent Ressler's knowledge to help with that. One of the last known criminals that we know used him is one that Agent Ressler was familiar with in his previous task force."

Ressler's head shot up and looked over at Agent Warren.

"Samuel King ring a bell?", she asked.

"Yes, all too familiar", Ressler said while taking a deep sigh and looking over a Liz's puzzled face.

"Good. Agent Ressler, we'll need to pull up any known info you can get your hands on."

Ressler nodded and started walking over the elevator when Liz ran up behind him and stopped him in his tracks.

"Ressler, who is Samuel King and how does he tie into this?", Liz asked.

"He's an old informant of my previous task force that worked with us for 3 years until he up and disappeared one day."

"Ok, I'm coming with you. I can help look…", Liz said before she was cut off by Agent Warren who had overheard their conversation and walked up to intervene.

"Actually, Agent Keen, I've asked Agent Navabi if the two of you could look again into the business files on Dr. Mario's cosmetic practice."

"We've been through them for the past 2 days, there's nothing." Liz said as she looked over at Ressler for support.

"I think we should look again. There has to be something we aren't catching…", Agent Warren said while walking towards the elevator. She shot a look back at Ressler.

"I'll help Agent Ressler sort through his old files … I know more about this man than I care to admit. If anything pops up in Samuel King's files that is relevant, I can better spot it out."

She looked at Agent Ressler and smiled.

"Plus, it will give me and Donald a chance to catch up... find out if he's still the same charming agent I knew from back in the day."

Ressler gave a look to Keen as he caught up to Agent Warren and proceeded to enter the elevator, leaving Liz standing alone.