While Chuck had to go and take out Jill, you were busy getting ready with Sarah and Casey. Since Chuck and Jill were going to be at a music hall, the three of you were going to be posing as ushers.

You all quickly got ready and hopped into Casey's car.

"We're almost to the Music Center. What's the ETA on Chuck and the FULCRUM agent?" Casey asked.

Sarah leaned over and checked the GPS. It then said Chuck's location was gone.

" Wait, I lost him. His signal just dropped off the grid."

" What?" you said, panicking.

"It was a ghost. Turn us around, Casey, now!" Sarah shouted.

"They're not at the Music Center." Casey said frustrated.

"North 101. Go!"

Casey stepped on it. Jill took Chuck to a fair.

You all made it to the fair and were searching everywhere for Chuck and Jill. But sometime later you found Chuck, Jill by his side with a gun on him.

"Don't move!" Sarah yelled, gun pointed at Jill.

Casey ran over and took Jill down.

" No, no, wait, wait, wait!" Chuck shouted.

"Chuck!" you shouted, running over to him. He looked over and saw you coming and wrapped you in a hug.

"Are you okay?" you asked, looking him over.

"Yeah...She saved my life."

You brought Jill down to Castle and had her hooked up to a chair to do a lie detector test. You and Chuck stood by as you let Sarah and Casey handle it.

"Answer all of our questions with a "yes" or "no. "" Sarah explained.

"Okay."

"Is your name Jill Roberts?"

"Yes."

"Did you attend Stanford University?"

"Yes."

So far everything was coming up positive.

" Can I ask a follow-up question?" Chuck asked.

" You're about to leave through that window." Casey warned.

" I rescind my follow-up question."

"Do you have a degree in molecular biology?"

" Yes."

"Are you a FULCRUM agent?"

" No. Wait... I'm sorry. Telling the truth is new to me. Yes, I am a FULCRUM agent."

"Do you know the current whereabouts of your FULCRUM handler, codename Leader?"

Jill paused.

" Do you know the current whereabouts of your FULCRUM handler... "

"Yes."

" Give us the location now." Casey ordered.

Jill paused again.

"Tell me now or I lose my calm." Casey now warned, leaning over her.

" Jill. Jill, just tell, just tell him. Please, just tell him." Chuck said.

"Okay, I'm not supposed to know this, but FULCRUM has a mobile medical unit. You'll find Leader recovering in an office building in downtown Los Angeles."

" Is this a trap?" you asked.

" No."

Sarah and Casey went to go get ready to leave and you and Chuck went to approach Sarah.

"What about Jill, Sarah?" Chuck asked.

"I know what you're thinking. That Jill is the same person that you went to school with, and the same person that you dated. But we cannot be certain."

"Listen, it's not that I really like her, but she did save Chuck's life. That's got to count for something." you argued.

"Trust me, guys. You can't trust her." Sarah finished before leaving.

"Y/N I need to talk to her." Chuck said, as you were both chilling down in Castle.

"I know..."

"Are you okay with that?"

"Well...yeah. I know you have some questions for her and still need some closure on everything."

Chuck nodded.

"Can you come with me?"

"Of course." you said softly.

You both stood up and Chuck put his arm around you and you both walked over to the room, where Jill was still being held in, strapped to the chair.

"Hey." Jill said softly.

"We were just seeing if you, you know, if you needed a water or something." Chuck said.

" No, I'm good. Are Casey and Sarah ready to start again?"

"Um, no. No, not just yet. But before they do, I was wondering if I could maybe ask you a few things."

" Do you know how to work all this stuff?"

" Yeah, totally. I, uh, read the manual."

" You read a lie detector manual?"

" No, this is the manual for the entire Castle base."

You shook your head and laughed softly.

"I am not even surprised." you said.

You and Chuck then stepped in the room and sat down.

"Would you, uh, would you mind if I ask you a couple questions?"

" Go ahead."

" Back at Stanford, when we were dating, was that for real?"

"Yes."

It came up positive.

"Okay, then, well then why did you sleep with Bryce right after he got kicked out of school?" you asked, frustrated.

"Y/N, it has to be a "yes" or "no" question or it won't work."

" Did you love him, too?" You asked.

It wasn't your place to ask these questions, but Chuck was a mess when Jill hurt him and you had to pick up all the broken pieces. It killed you to see him like that and it angered you.

Chuck looked at you, feeling thankful for you and understanding why you stepped in. Chuck was there for you during your breakups and would definitely be like this with one of your exes if they were here.

He was just extremely happy to be with you now and did not have to worry about you hurting him.

" No."

"Great. That's great. That makes it even worse." Chuck said.

" There's a question you're not asking. It's right there, and you're not asking it."

" Did you sleep with Bryce?" Chuck asked.

" No. I didn't."

"Jill...can we trust you? Like really trust you and trust that you won't hurt Chuck ever again?" you asked, looking her right in the eyes.

"Yes. Please get me out of this."

You and Chuck looked at each other and nodded and went over to Jill, helping her out. Not realizing that when she answered your question. It came up negative.

Sarah and Casey were able to find the leader. Sarah decided to give you a call to let you know.

"Y/N, we have Leader. We're taking him back to Castle."

" Great. See you when you get back."

You hung up, looked at Chuck and then you both looked over at Jill.

Gun pointed at you both.

" I'm sorry, guys."