After Kara's demonstration of her abilities, Joe silenced any further questions on the matter, though he was still worried for Barry and gave his foster son a look that said we're not done with this conversation. Kara missed the look as she was introducing herself to Caitlin and Cisco. Caitlin treated Kara with respect while Cisco began his usual fanboy tirade of questions.

"So Kara, who named you Supergirl? Are you really Superman's cousin? Your powers, think we could get more of a demonstration in the Speed Lab? How can we..."

"Cisco! Breathe man; Kara is here to help us. I'm sure she'd be happy to answer all of your questions. But she's due back in National City and we do have a killer to catch."

"You're right Barry, you're right. I'm sorry I just got over excited. Caitlin; why don't you take this?"

"Right, Barry, Kara if you'll follow me, I have a few more answers on the Meta that was killed."

"I'm coming too..."

"Cisco, we'd be happy to have your help, but we need you to..."

"I know, I know...track the bad guy. But I call first dibs on naming him!"

Cisco got to work as the trio left the control room to examine the victim, along the way Kara couldn't help but laugh at Cisco's antics, causing Barry and Caitlin to look at her questioningly.

"Kara, what's so funny?"

"Not much Barry, it's just your friend Cisco, he reminds me so much of a friend of mine. Winn, he's just as much of a tech head, I hope I'm using that term correctly, I can't help but think the two of them would get along."

"We'll have to introduce them then. Anyway Barry, Kara, we weren't able to get any identification on our victim. I mean he is definitely meta-human, but he's got no record of ever living in Central City."

"Then how does he have powers? The particle accelerator caused the meta-humans in Central. This doesn't make sense."

"I'm still working on that, It's possible however unlikely that his powers came from another outside source."

"When you have eliminated the impossible, whatever remains, however improbable must be the truth."

Barry and Caitlin both stopped and turned towards Kara after she finished the quote. Caitlin's reaction was one of quiet amusement as Barry's jaw dropped open in shock.

"What? Barry; you didn't think you were the only person here who has an admiration for Sir Arthur Conan Doyle and Sherlock Holmes did you? Those crime stories were what inspired me to look deeper as I tried to become a reporter in my outside of the cape life. My adoptive father read them to me in an effort to help me assimilate to earth."

Kara started walking again leaving Barry and Caitlin to catch up. Not being aware of Kara's super hearing Caitlin whispered to Barry what was meant to be a joke in regards to their new companion.

"Jeez Barry, how could you possibly have found another person as obsessed with detectives and solving crimes as you?"

"I heard that."

Kara called back making Caitlin blush in embarrassment as she and Barry hurried to catch up. Her embarrassment quickly turned back to scientific curiosity because although she was still working on identifying the origin of the victim's powers, she found something even more intriguing upon a second examination.

"So, if we can put Sherlock Holmes aside for a moment, and think more like Doctor Watson, I've got something to show you two."

After pulling the body out of cryo, Caitlin pulled back the sheet so Barry and Kara could get a closer look than they had at the crime scene earlier in the day. The green burns were still prevalent around the chest cavity and the heart was indeed as she had described it. But what she really wanted to show them was something only one of them had direct knowledge of.

"So, except for the burns on his chest, his charred heart, and some minor electricity burns on his hands which indicated he tried to fight back, I found something lodged in his rib cage. I've never seen anything like it before."

Caitlin opened up the metal container that she had placed with the body as evidence and revealed a glowing green light. She was mystified however as the item hadn't been doing that when she found it. While Barry stepped closer, Kara had to pull back, her proximity to Caitlin's find already causing her to feel weaker.

"Close that up! Caitlin, please...!"

"Kara...?"

Barry had turned to see Kara fall on her knees, her skin reflecting the color of the rock. He could tell she was in pain, and upon kneeling beside her, he could see that her skin wasn't reflecting the color of the rock; her body was absorbing whatever radiation that thing was putting off. Quickly getting back to his feet he closed the lid, about to run the case as far away as possible. Before he could though, Kara was slow getting back to her feet, but as soon as she was, she sped off despite her semi-weakened state.

"Caitlin, whatever that rock is, it had a negative effect on Kara. We need to keep it as far away from her as possible."

"I will. Where are you going?"

"To find her."

Barry sped off after his new friend while making a quick stop to grab some Star Labs clothing for her. He knew exactly where he wanted to take her and while they could walk in the place in full uniform, he didn't want to cause chaos with the general citizenry begging the two of them for autographs and questions about being superheroes. He wasn't able to get far as her voice called out from above him.

"Barry...up here."

Kara was sitting up on one of the undamaged sections of Star's roof, her feet hanging over the side. In seconds, Barry was up there sitting beside her, his mask off since they were concealed where they couldn't be seen.

"Kara, what was that back there? Whatever that rock was it...and I got worried..."

"On earth, it's called Kryptonite. Besides Kal and I, it's the last remnant of our world. That rock as you called it is the only thing that can harm us..., actually with enough exposure, it can kill us."

Barry didn't know what to say to that, he deals with life and death situations daily, and there are so many things that can wound and kill him, that he doesn't realize how dangerous something that seems as simple as Kryptonite can be. But the revelation also brings him just a little bit closer to Kara in that moment. He realizes that she just might be able to truly understand him better than he originally thought.

"I'm sorry Kara..."

"It's okay, neither you nor Caitlin could have known kryptonite would do that to me. Very few people know it exists as Kal..."

"Kal...?"

"Superman, he took most of what had been found, had it placed in a lead container and threw it into the sun. And those weren't small pieces like the one you guys have, they were massive. He thought he had it all."

"Can kryptonite cause harm to humans?"

"The element itself, we're not sure. But everything that emits radiation is a danger. So I'm sorry I took off like that. I just had to put as much distance between me and the kryptonite as possible."

"You don't have to apologize. You didn't do anything wrong. Listen, you want to go somewhere?"

"I can't exactly go anywhere public dressed as Supergirl. Think about the craziness that would cause."

"I did, that's why I brought you these."

Kara took a quick look at the bundle of clothing Barry had brought with him. The sweatshirt had the Star Labs logo prominently featured and the sweatpants had just a star.

"You want me to wear these? Where exactly are we going?"

Barry sheepishly rubbed the back of his neck as Kara smirked at him while still holding the clothes. She wasn't angry that he brought her these clothes, just confused at his nervousness.

"Well, these clothes were the quickest option I had. I didn't know where you'd gone and I wasn't sure what you'd done with your plain clothes earlier so..."

"Barry, it's fine. I left my Kara Danvers clothing in a safe place. I can always go back and get them later. This will work for now. So, where are we going?"

"That's a surprise. Meet you at ground level in five minutes?"

"Sure. Oh and Flash...?"

Barry was just about to run back down the building when Kara's voice stopped him in his tracks. She had a genuine smile on her face as he turned back around. Once again she had him wracking his brain at what she was thinking.

"This surprise better be a good one."

"Don't worry about that, it is."

Barry gave Kara a quick smile back before he ran down the building. She didn't know why but she felt butterflies after he disappeared out of sight. Five minutes later she was changed, had her glasses back on and her hair pulled back in a ponytail. Barry met her and he was dressed in his own Star Labs shirt, a pair of jeans and a red jacket.

"Ready to go?"

"Yeah, just give me a..."

Kara pretended to sway as if she was dizzy. A look of concern appeared on Barry's face as he reached a hand out to steady her.

"Think I'm still feeling the effects of the kryptonite. Barry; can you..."

"Put this off? Maybe just take a walk towards our destination?"

"No, I was wondering if you could carry me? You know Central better than I do, and I want to get wherever it is you're taking me fast."

Barry didn't know how to feel as he pondered Kara's strange request, three hours they've known each other now, and she has already found a way to keep him guessing and on his toes. He had a feeling she probably wasn't feeling the effects of the kryptonite anymore, but still decided to grant her request. In an instant, he had her in his arms the same way she had him earlier as she wrapped her arms around his neck and leaned her head on his shoulder.

"Comfortable?"

"Sure am; Barry. Ready?"

"Let's go."

Barry sped off with Kara holding on. As they ran, she felt the butterflies again as she watched the pure exhilaration on his face as he let his speed propel them through the city. She knew he wasn't holding back, her powers meant that he could really let go. Barry spared a glance at his passenger as laughter escaped her lips from the joy of their journey. The sound gave him a great feeling as he knew she could handle the speed he was going. He'd done this with Caitlin when she wanted to help him test his speed while carrying someone to safety and once with Iris. If he was asked, Barry wouldn't be able to explain why this time felt so different, he could only say that experiencing this with Kara was a rush unlike any he'd ever had before. Eventually they came to a stop at their first destination, but neither spoke the words of how they kind of just wanted to keep running.

"This is where you were taking me Barry? A Jitters? We have one of these in National, I thought..."

"Kara, this is just the first stop, I thought maybe we could grab a cup of coffee before I get to the real surprise."

"Are you taking me out on a date Barry Allen, because..."

"What?! No I...I mean I..."

"So this is not a date? Too bad."

Kara adopted a smirk again and Barry knew she was teasing him, and she enjoyed how flustered she could make him with just a smile and a few words. After a few moments he regained his composure, opening the door for her so they could finish this first part of his surprise.

"So Kara, what would you like?"

"Well, I bet your Jitters doesn't have The Last Daughter, so whatever you're getting will be fine."

"Wait...what's the last daughter?"

"A drink they named after Supergirl. It was a little embarrassing when I found out."

"Your Jitters does that too huh?"

"Yeah, why? Yours named a drink after...?"

"The Flash. It's a single brew with a shot of espresso."

"Seems kind of plain, I thought that...guess National's Jitters went a little overboard. Anyway where to next?"

"Next is the real surprise."

With their coffees in hand, Barry again picked Kara up as the next place he wanted to show her had important ties to his life as the Flash. His actions however didn't go unnoticed as outside Jitters, they were met with a whistle and comments.

"Better enjoy the young love stage while you have it kids. Because sometimes it can end, but when it's for real, nothing else matters. Good luck to you."

Both Barry and Kara blushed at the stranger's comments as they ducked down an alley to keep his identity secret before taking off for another run. Both were unaware that the stranger knew who they were nor did they hear the next thing he said.

"Seriously Barry, take good care of Kara, she's going to become really important to you in the months and years to come."

Minutes later, Barry and Kara arrived at the spot he really meant as the surprise. Though their drinks hadn't gotten cold, she warmed them back up with her heat vision before looking around.

"So where are we now Barry?"

"This is where I first tested my powers. I got super speed thanks to the lightning strike, but this is where Flash was truly born."

"What are we doing here?"

"I come here to think. This place reminds me of a simpler time in my life when I was first starting out as a hero. I wanted to accomplish so much those first days, and I have. But we're here for a different reason. Kara, you know I don't have much to give you on the investigation for your story..."

"I know. I kind of expected that."

"Instead, I'm going to give you a one on one exclusive interview with the Flash. I hope that Ms. Grant is blown away by what you bring back to her."

For the next few hours Barry gave Kara an in depth interview about the full range of his powers, his life, and finished up with his theories and suspicions on the case. They talked long into the evening as the sun began to set. The environment was so peaceful, Kara felt at ease with the world around her. Though she loves being Supergirl, in this moment she was just Kara Danvers again.

"Thank you Barry, I know this article isn't what Ms. Grant will be expecting. But I know it will be what she needs."

"My pleasure. Guess we'd better be getting back."

"No..., can we just watch the last of the sunset together?"

"I'd like that."