Iron Heights Penitentiary, a few seconds later.

"Let's have a chit chat later," said Oliver in his gravelly 'Arrow' voice while he glared at Darhk, "we need to put these people back into their cells."

"Right," said Barry as he nodded his head at Jay. Barry then turned to Kara and was about to say something, however, she interrupted him and said that she'll help out as well. Kara nodded he head, and gave a smile even though she knew that once this emergency was over, then she would see him again… in reality, Kara wanted to spend more time with the Flash.. but was afraid of trying to say anything that would make it seem as if she was interested in him as anything more than just a friend. As Barry and Jay ran out of the prisoner's visiting room, Kara just watched the trails of lightning vanish before she noticed that Laurel, Diggle, and Oliver were looking back at her while she was looking out into the hallway that Barry and Jay just ran through.

"How about we girls help round up the rest of the escapees," said Laurel as she gently held onto Kara's arm, "I'm Black Canary."

"Su… Supergirl," said Kara as she tore her eyes away from the hallway and looked at the masked blonde.

"Well, Supergirl," said Canary as she looked out two batons and nodded into another hallway, "shall we?"

Kara nodded her head as she and Canary ran past the unconscious Merlyn, and Andy… Diggle's brother, who was on his knees with his hands behind his head. Canary patted Diggle's should before she and Kara ran… Supergirl keeping pace with Canary as they entered another hallway, and encountered fighting prisoners.

"Oh this is going to be fun," said Canary as she looked at Kara, and then started to fight the prisoners that had just noticed them the two women. They stopped fighting each other, and launched themselves at them.

Two minutes. That's how long it had taken to put fourteen prisoners who were groaning in pain back behind bars. Canary had taken down four easily while Kara took down the rest using a combination of her speed, super breath, and strength. When all was over and done with, Kara welded shut the doors to the three cells that were holding the prisoners using her heat-vision.. and then turned to looked at an impressed Canary.

"So," smiled Laurel as the headed to the next section, "I can see why the Flash has been making googly eyes at you."

"No, he hasn't," cried Kara as she punched a prisoner who tried to surprise them by jumping out of a corner. They saw the man hit a wall, and then fall to the floor while she told Laurel that it really didn't matter anyway, "I won't be seeing him again, and he knows it."

"Huh?" asked the confused hero as she gently grabbed Kara's arm.

Kicking herself for even mentioning anything, especially to a stranger, Kara distracted herself from saying anything else by using her super hearing to discover that some guards were in trouble in the next building.

"You can hear it?" asked Laurel as she narrowed her eyebrows at the young woman, who nodded her head. Kara then put an arm around Laurel's waist, much to the masked woman; s surprise, and then flew to the next building through the various hallways. Laurel noticed the entire place around her becoming a blur, until her surroundings straightened themselves out a few seconds later. They found themselves in another room where prisoners had been holding five guards on their knees against, their backs to a wall. The prisoners were aiming weapons at them, weapons that Kara could see were taken from the guard's empty holsters. The prisoners were the first to notice the two women, and then all they saw was a blur that ran past them, and then their hands were empty. Turning to Kara, they watched with eyes wide open as she held the guns between her hands, and then squeezed… turning them to scrap.

"So," said Laurel calmly when the prisoners all turned to her, "either you big boys get beaten up by two women, or you lay down on the floor, and surrender."

The prisoners then turned to Kara, who wiped her hands clean, with numerous parts f the guns on the floor all around her.

And the Prisoners in the room surrendered by laying down on the floor, while Laurel helped the guards up to their feet. Laurel glanced at Kara, who was looking around at the prisoners while she had a little smile on her face, as if she was enjoying what she was doing. Looking away, Laurel helped to handcuff the prisoners, as did Kara. Once they were done with the last of the prisoners, Kara heard a buzzing sound and turned around to the source of it. She looked at Laurel who pressed into her ear, and then used her hearing to listen in to a voice… a female voice.

"Canary," said the voice, "Green Arrow, Flash, and the others are leaving. The police, and SWAT have already started to put down the jail break; I need you to get out of there."

"Got it, Overwatch," said Laurel as she looked at Kara, and smiled, "tell Barry that his friend and I will meet them back at the bunker."

"Already have," said the woman that Kara knew as Overwatch.

"How about Speedy?" asked Laurel as she nodded at Kara, and then at the hallway behind them. The both of them ran through the hallway until they heard police shouting in the distance for all prisoners to get on the ground. Overwatch told Laurel that Speedy was already gathered by Green Arrow, and she was already headed out of the prison. Smiling, held onto Laurel, who gave a yelp before she found herself screaming as Kara took her straight up, and then out of the prison.

"What the heck?" asked Felicity back in what was the bunker, the headquarters of team Arrow as she look out her ear-set upon hearing the loud scream from Laurel; followed by the rush of wind. Canary had her eyes closed the entire time they were flying, and actually felt the turns that Kara had been making. The blonde told Canary that she was following Barry who was right below them.

"Open your eyes!" yelled Kara, who grinned when Canara yelled 'no!'

Banking to her left while Canary screamed, Kara chuckled as she began her descent; the blonde mask woman screaming the entire way into her feet well on the ground. It was then that the freaked out young woman rushed away from Kara, and then bent down at the knees and breathed in and out to settle her nerves. About to apologize, Kara looked up as two streaks stopped next to Laurel, followed by a black van, and then a motorcycle carrying Oliver. Kara looked behind her, and found herself looking at a non-descript building that had 'Queen for Mayor' on the windows. She used her hearing as Oliver, as well as the others, headed for Laurel and asked if she was doing fine.

Turning around as Barry came up to stand next to her with Jay, Kara apologized to Laurel, saying that she may have gotten a bit excited since she didn't have people back on her own Earth like her and the others.

"Not here," said Oliver as he looked around. He then signalled to the others, who in turn signalled Barry and his friends to follow them down an alleyway. Kara walked along with Barry, a smile stuck on her face as they rode down an elevator. Once the door opened, it was Kara who steeped out first and looked around with Jay by her side.

"This is so cool," cried Kara who used her super speed to look at the arrows that were lined up in one corner, and then at the mannequins where the suits were kept when not being worn, and then she turned to the blonde woman sitting on a chair, and looking at her with her mouth wide open. Kara then gave a small smile, and waved before saying, "hi."

"Ummmm… Barry," said Felicity as she turned to the speedster who took off his cowl. It was then that she saw Jay, and narrowed her eyes at the man. She pointed at him, and then at Barry while stuttering, and then she looked at Kara while waving her hands.

The young woman looked silly as she tried to find the words to say something about Kara and Jay; one had super speed, and the other one looked just like a picture of Barry's father that she had seen a couple of years ago.

"That's our reaction," said laurel as she walked onto the platform where Kara was standing with her hands in front of her.

"Oliver Queen," said Jay as he nodded at the man who, in turn, looked back at Jay confused. He then glowered at Barry, who raised his hand and said that he never mentioned anything to him. Jay then told Oliver that Barry was right, "you're the Green Arrow. And I take it the one in red is Speedy."

"Now this is getting a little bit creepy," said Thea after she placed her bow on a hook.

"I'm sorry but I don't know the rest of you," said Jay as he looked around, and then back at Oliver, "it's good to see you again."

"Oli," said Barry as he placed a hand on Jay's shoulder, "this is Jay Garrick. He's from a different Earth."

"Different Earth?" asked Thea who stood next to a suspicious Diggle, who kept on glancing at the nervous Kara.

"Earth-Three actually," said Jay.

"I remember Barry saying something about Zoom being from Earth Two," said Oliver as Felicity and the rest of Team arrow looked at him n surprise before asking him why he never made mention of this to anyone.

"It wasn't something that I needed to tell," said Oliver as he looked at the others, and then at Kara, "and you? You're from Earth Three?"

"No," said Kara who walked towards Barry, "I'm… I guess I'll be from Earth-Four."

"So," said Laurel, who had already calmed down, while walking towards Kara, "you can fly, and you have super-strength."

"And heat vision," said Barry while Felicity excitedly got up from her chair and approached Kara, "X-ray vision, hearing… anything else I missed."

"No," said the blushing Kara before Felicity said that they were being rude. She then introduced herself, and the other members of Team Arrow before insisting that they all go for dinner since they had defeated Darhk, and because they have two new friends to get to know.

"Dinner can wait," said Oliver as he held out a chuck of rock, "this was taken from Darhk's destroyed idol, I need to hide this on Lian Yu before…"

"That's important?" asked Kara.

"Yea," replied Felicity as she walked towards Oliver, who said that if Darkh could combined all the destroyed pieces together again, then he'll regain his magic. Kara then smiled before super speeding towards Oliver, grabbing the idol part out of his hands, and then she waved from the elevator.

"Hey," yelled Oliver while Barry chuckled. Team Arrow ran towards the elevator, which closed. Barry then called out to Oliver, saying that Kara was just excited. He could see that Oliver, Diggle, and Thea were about to say something – but he pre-empted them.

"In her world, it's just her and her cousin protecting everyone," said Barry gently while Oliver and Diggle frowned and put their arms across their chests, "she said that I'm the only other superhero she met, the only one who wasn't trying to kill her. And here, on this Earth, she meets all you guys, and Jay, and she's excited."

"Look, Barry," said Oliver, "I get she wants to help but she's being reckless. She doesn't even know where I wanted to keep the part, I have some place secure that I know Darhk would never get to and…."

Suddenly, Barry heard a buzz in his ears from his earpiece. The man asked Oliver to hold off from saying anything else, while he spoke to a very panicked Cisco. Apparently, one of the breaches had opened wider since more exotic energy than before was flowing into their Earth, "where are you?"

"Star City," replied Barry as he shook his head, "Cisco, are you sure?"

"I'm sorry Barry," he replied, "Harry and Joe are already headed for the largest breach, the one we sent Grodd through. Caitlin and Iris are heading to another one. Barry, we need to get Kara home."

"Yeah," he said softly with a tinge of sadness in his voice, "I'm sending Jay to you, tell him where you need him."

"Got it," replied Cisco. Barry then turned to Jay, while the others looked on curiously, before telling the man that he was needed back at Central City.

"The breaches are getting wider, Jay," said Barry, "I need to get Kara back home, and then…."

"I understand," came the reply, "tell Kara I said goodbye?"

"I will," said Barry as Jay ran to the elevator. He took it up to the surface while rubbing forehead. Oliver asked Barry what was going on, but all he did was shake his head before turning to Felicity and asking her if she could create a full background for someone, "I mean birth certificate, social security, social media presence, I mean everything."

"Of course," came the reply, "but..."

"I need your help, Felicity. All I can tell you is that this is something big," said Barry as the elevator behind them dinged, and a smiling Kara sauntered out of it while telling Barry that she saw Jay heading back towards Central City. Before Barry could answer, Kara noticed the funny looks that everyone was giving her. Her smile vanished from her lips, the young woman then looked at Barry who looked sadness at her while pursing his lips.

Something had happened.

"I.. I guess it's time?" asked Kara as the others looked at each other while Barry took a step towards her, "I.. I mean.."

"The breaches are getting wider, Kara," whispered Barry, "you know I wish that…"

"Yeah," replied Kara before she shook her head, and then a smile formed on her face. Barry looked at the smile, and then at the sadness in her eyes before she walked past him. Turning around, he saw her face Oliver and tell the man that he shouldn't be having a problem from Darhk anymore, "I threw the pieces into space, towards the sun."

"Oh," said Thea as Oliver narrowed his eyes and tilted his head, "that's better than just hiding it in some island."

"I second that," replied Felicity.

"Oli?" asked Laurel.

"Yea," replied Oliver nodding his head at the smiling Kara, "thank you. I'm sorry we have had much time to get to know one another."

"Barry's lucky," said Kara as she looked behind her at the man in red just as she felt a hand on her shoulder. Looking at the unmasked Laurel, Kara smiled as she listened to the blonde in black saying that she was sorry she nearly puked on the flight.

"I would have like another ride," said Laurel as Kara chuckled, and nodded her head.

"Ready, Kara?" asked Barry as he had his hand out towards Supergirl.

The West Residence, Earth-Four, 2300 hours.

A few blocks down from the West household, a blue portal opened up and a blue of yellow lighting dashed out before stopping a few feet away. Barry placed Kara back down on the street feet first before looking back at the closing breach, and then at each other. It was then that the both of them realized they were still holding onto each other. Barry and Kara let go of each other at the same time, and then looked at the emptiness where the breach had once stood.

"So," said Kara turning back to Barry, "I.. I guess this is it."

"Yeah," he whispered as he looked at Kara. Barry knew that there were a few things he wanted to say; that he hoped to see her again, that he hoped they could hang out sometime, that he liked her smile, and that that he wished they could grab dinner sometime. But all that came out of his mouth was that working with her was amazing.

And Kara had the same things that she wanted to tell him. She knew that a part of her heart would be for James, but she knew that Barry was a different kind of person. He was someone who was just like her, especially in terms of having powers and balancing it with a personal life; he was someone who knew what she was going through, he was someone she could see herself fighting alongside… at least when Clark and J'onn were unable to help, and she could see herself sitting across from him and sharing a drink, or having dinner.

Both Kara and Barry knew that this was it, that there was no way for either of them to stay in each other's worlds. Kara still had her friends and family on her Earth, and Barry's family was going to be complete on his Earth. They each knew they couldn't convince the other to stay, so they kept silent.

All they did was give each other a tight hug in the middle of the barely lit street.

"Goodbye, Barry," whispered Kara as she tried to keep the lump that was forming in her throat.

"Goodbye, Kara," said Barry as Kara tightened her hold slightly, but not enough to cause pain. On the other hand, Barry ran his hand through Kara's blonde hair while saying that he'll break the dimensional walls to save her again if she was in danger. All Kara could do was chuckle before parting ways. She nodded her head before gently squeezing his arm one last time.

Barry waved as Kara took off into the night sky. He could tell from her expression that she wasn't good with saying goodbyes, and that it was probably better for the both of them if they just went their separate ways. Barry looked at the star lit sky before running towards the West house. His heart pounding in his chest, Barry stopped at the door, and then knocked.

Smiling as the door opened to reveal Nora, who was laughing in joy upon seeing her son, hugged Barry tightly.

"Mom," said Barry as Joe, and then Francine rushed out of the kitchen upon hearing Nora's laughter.

"Hey Barry," said Joe as he rushed to the door with Francine as Wally walked down the stairs, and grinned at the Flash, "everything ok?"

"Yeah," he replied, "Supergirl's back home and… and it's time we went back."

"Now?" asked Nora.

"I'm sorry, mom," said Barry, "but the breaches on my Earth are expanding and.. and we can't close them until we're back on Earth One."

"Oh," said Nora who turned and looked at a tearful Francine.

"Go home to your family," Francine's voice broke as she hugged Nora tightly, while Joe held on to Barry's shoulder, and made him promise to look after his mother. Nodding his head, Barry stepped back as Joe hugged Nora, while Francine hugged Barry. The two of them separated, and then looked at Nora hugging a tearful Wally tightly. Barry then looked around and asked if Iris was around, but all Joe could say was that she was on a date.

"I'll call and.." Joe was about to call, but Barry simply told him that there wasn't much time.

"Tell Iris that.. that I loved watching her grow up," said Nora as she grabbed Francine's hands, "all of you saved my life. Kept me grounded and… and thank you."

"I love you, Aunt Nora," said Wally who hugged Nora one more time.

It was a few minutes later that Wally, Joe, and Francine stood on the porch as Barry carried Nora in his arms. The older woman lay her head on Barry's shoulder after saying one final goodbye to the West family, "I'm ready, Barry."

Nodding his head, Barry took off running. Nora saw everything blur around her while yellow lightning surrounded them. She looked around, and then at Barry whose eyes were sparking yellow, before giving a small smile. She then looked forward, and watched a blue hued breach open.

Unknown to Barry and Nora, Kara was high in the sky looking down at the West House. She wasn't using her hearing, or her X-ray vision to intrude on them. She just wanted to see Barry one last time. And she did see him, and Nora, just before they entered the breach.

"Goodbye, Barry," whispered Kara wiping a tear before flying off, "I'll miss you."

TBC.