"Okay, tell me Max," Marley said.

"Where do I start?"

"From the beginning," Kara replied, nudging Mxy.

Barry, Kara and Marley, were looking into Mxyzptlk's eyes, ready to listen to any new information given.

"So you're from Earth-38."

"Correct," Kara said, gesturing to Mxy to carry on.

"Sugar, you live here, on what is called, Earth-9."

"Uhh, what do you mean Earth-38 and Earth-9? But I guess, correct."

"Marley, I'll explain the different earths thing later," Barry replied, interrupting Mxyzptlk.

"Before I continue, sweetie, I have to tell you something about myself," Max told Marley.

Marley looked at Max with a confused face.

"Hey 'Max', can you please stop calling her silly names. Her name is Marley, I consider you start using it, " Kara expressed, giving Mxy an evil glare.

"Okay, Marley," Max said, with an emphasis on her name, "My name isn't actually Max Thomas Wood. My name is Mxyzptlk. Most people call me Mxy, mostly because they are too dumb to be able to pronounce my name correctly. I am from the 5th dimension, and I am deeply in love with you, beautiful," he said, looking at Marley.

"Woah, that was a lot to take in. Why did you never tell me this? We had a no secrets rule. This is the biggest secret, and you don't even bother to tell me," she said, raising her voice.

"Sweetie."

"Max, or whatever your name is, I just need a minute to process," she replied, walking away to a nearby table.

"Kara, there is something you need to know."

"Yes Mxy?"

"You weren't an only child."

"Yeah, I know, I've got Alex."

"Not what I meant."

"Oh."

Barry just sat there, listening to the conversation, not saying much. It was like he was unaware of anything else happening around him.

"I mean, you have a biological sibling."

"Impossible Mxy, I would remember if I had a sibling."

"You don't get what I'm saying. I'm tryna tell you that Marley is your sister."

Kara's eyes opened wider than they already were.

"To be exact, she isn't just your sister, she's your twin."

Kara was speechless. She had no idea what to say. Neither did Barry.

A few minutes passed, and Marley returned to their table.

"Hey sorry about leaving. I just needed a minute alone."

"That's okay honey," he responded.

"Is Kara okay?"

"Yeah she's fine, I just told her something."

"Do I know about this something?"

"You don't, well, not yet. I was going to tell you, but you needed space. I'll tell you when Kara is ready for me to."

"Huh? I heard my name... Mxy?" Kara said, looking up, confused.

"Okay, beautiful, sit down. I'm gonna tell you something, and you probably won't believe me. But I'm Mxy. I know everything."

"I'm ready," Marley said, pulling out a chair, and sitting down.

"Honestly, I don't think you are," Barry said, butting in, like usual.

"Here goes... Sweetie, Kara is your sister, your twin sister. Also, you are an alien."

"Alien? Aliens don't exist."

"Well here I am, sitting next to you."

"It's true," Kara said, breaking her silence.

"Whaaaat? How?"

"Marley, you are from a planet called Krypton," Kara stated, "It's gone now, but it once was a beautiful place. Because of our Sun that Krypton was orbiting, I was able to gain powers, once my pod landed on Earth. Unfortunately, I don't have my powers on this earth, the air is a little too polluted, and not enough sun, to recharge my powers.

Flashback*

Kara and Marley could be heard laughing from a few rooms away. They were playing hide and seek. Which was pretty hard, considering there were barely any places to hide.

Marley tackled Kara, and they both fell to the ground, in a fit of laughter.

"Hey, Kara, Marley, stop playing games. It's time for sleep," Alura said, walking in, sending the two young children to bed.

"But Moooom,"

"No buts Kara! Bed, now!"

"Fine," Kara growled, as she stomped out of the room.

"Do you think that they'll actually go to bed?" Zor-El asked, knowing that the twins would probably be up for a while.

"Maybe we should go check on them," Alura replied.

"Hey Marles?"

"Yeah Kara?"

"Do you think Aunt Astra will come back?"

"Maybe, I hope so.

"Mommy said she wouldn't," Kara said, tears starting to explode down her face.

Alura and Zor-El walked into, the now quiet room.

"Bedtime," said Alura, tucking the twins into bed.

"Okay. Mommy, Daddy, can you read us a bedtime story?"

"Which one Marles?" Zor-El responded.

"Any of them."

"I want the one about twin sisters, saving the world."

"Alright Kara. Supertwins, coming up," Alura said, picking the book off the bookshelf in the corner of the room.

"Once upon a time," she read, "There were two little girls..."

About ten minutes later, both girls were fast asleep.

Marley looked up from the table.

"Hey Marley, you okay? You passed out a moment ago," Kara asked.

"Yeah, yeah I'm fine. I just had the weirdest dream though."

"What was it?" Barry asked, curious.

Well, I think Kara and I were on Krypton. We were quite young. It was our parents, I think named Zor-El and Alura. It was night time, and they read us a bedtime story. I'm pretty sure it was called Supertwins.

"Supertwins? That exact name?"

"Yeah, why?"

"I had a book placed in my pod, when I escaped Krypton. It was called Supertwins."

"I'd love to learn more about Krypton," Marley mentioned.

"Maybe if you come back with me, to Earth-38, I can tell you what I remember. Plus, with the Fortress of Solitude, and my cousin, Kal-El, you can learn about our family.

"What about my friends? My family? I can't just leave them behind."

"I have to go back to my friends and family too. I have a sister. Non-biological of course. Her name is Alex, she's probably very worried right now."

"Maybe I'll come with you. I'd just have to say goodbye to ever--"

Marley fell forward, passed out, maybe she was having memory flashes.

Flashback*

"Kara, Marley, meet your new cousin, Kal-El."

"Wow, he's beautiful, Aunt Lara," Kara said, staring at Kal.

"Can I hold him?" Marley asked.

"Sure, just don't drop him."

Kara and Marley walked away, Kal gigging, as Marley tickled him. He was the most gorgeous baby, and the sweetest.

"Kal-El, you are going to be our best friend, forever," Kara said, watching him giggle, and smile.

Marley lifts her head up. This time, there is a small bump on her head, most likely from when she passed out.

"Did it happen again?"

"Yes, Marley it did. I should be concerned," Barry said, "Mxy, can you heal Marley."

"Sure. Sugar, this might hurt a little."

"I'm ready."

"Huh, thats awfully strange. My powers aren't working," he said.

"Maybe it's because you've been exposed to this air for so long," Kara said, pointing at the sky outside, a little darker, than on the 'Bright and Sunny, Earth-38'.

"I have never really stayed that long on this earth before," Mxy replied.

"So Marley, what did you dream about this time?"

"First of all Barry, I don't think they are dreams. I'm pretty sure they are memory flashes. Secondly, I had a memory of when Kara and I first met our cousin, Kal-El. Aunt Lara was there, Uncle Jor-El was there. But, Aunt Astra wasn't there."

"Maybe they are memory flashes. I honestly don't remember first meeting Kal," Kara responded.

They talked for a while longer. Marley had another memory flash, this time, it was from right before her and Kara got into the pods.

All of a sudden, a guy walks in the front door. A guy that looked awfully familiar to another person in the café.

Barry's doppelgänger, Sebastian, had recently gone on a holidy, to visit family in Paris. He wasn't due home for another few days.

Mxy used to be a Warbler. So Sebastian and Mxy were brothers.

Once a Warbler, always a Warbler, right?

"Hey Sebastian," Mxy said, calling him over to their table.

"Hey Max."

"There is someone I'd like to introduce you to," he said, "Sebastian, this is Barry Allen. Barry, this is Sebastian Smythe, your doppelgänger.

"Marley," Sebastian said, in a snarky tone.

"Sebastian."

"Wait, wait, wait," Kara said, interrupting, "Why so snarky 'Sebastian'?

"Our glee clubs are rivals, we don't like each other," Marley responded.

"You're in a glee club?" she asked.

"Yes."

"Excuse me, who are you?" Sebastian asked.

"I'm Kara, Marley's twin sister."

"You look a lot older though."

"That's probably because I am, 10 years, to be exact."

"How is that possible?"

"No idea."

"I have to go, I'm meeting someone,"

"Bye Sebastian," Max said, expecting a reply.

"Hey Blaine," Sebastian said, as he and Kurt walked in.

"Seriously Blaine, you brought him?" Sebasian remarked.

"Long time no see, meerkat," Kurt said.

"What happened with you earlier?" Blaine asked.

"Earlier, I was on a plane, from Paris. I just got back," Sebastian replied.

You could tell Sebastian was a little jet lagged, he was being a little soft.

"How does that work? We were talking to you earlier, you were in the auditorium? Does that ring a bell?" Blaine asked, confused.

"When I said I only got back, I mean, my plane only landed an hour ago. Wait... I think I know what you mean. You met Barry, my dop-,"

A latina woman walked in the door, softly pushing everyone in her way. Finally reaching Barry's table.

"Well well well, if it isn't the little 'innocent' fievel. What happened now, did you become besties with your friend Marley here? Forget about the rest of your stupid life? Finally change that disney haircut of yours? Got a worse sense of style? Oh, hey Max."

"Dop-pelgänger," Sebastian finished saying, when Santana walked into the room.

Everyone, was staring at her, including Blaine, and Kurt.

"Sha-Queera," Sebastian said, bluntly, walking over to face her.

"Wha-?" Santana replied, looking back and forth, from both Barry and Sebastian.

"I see you've met my doppelgänger Barry."

Barry gave her a small smile, and a wave, "Hi."

A few minutes had passed, Barry ended up explaining to Santana, Blaine, and Kurt, what exactly a doppelgänger was, with them assuming that Kara was Marley's doppelgänger.

"Wait, so Kara, you're Marley's doppelgänger?" Kurt asked.

"I'm actually her sister, twin sister to be exact."

You look so much older though."

"I am, but it's complicated."

"Wait what? You have a sister Marley Why did you never tell us about her?" Blaine asked.

"Maybe, because I only found out today," she replied.

All of a sudden Barry's hand started to phase through the table. Everyone just stared at his hand, weirdly.

He leaned over to Kara, and whispered in her ear, "Uhh... Kara, I didn't do that, I can't stop my hand from vibrating."

A large breach opened outside the small café, it was identical to the one that Barry had travelled through, mid last year.

A woman, resembling the appearance of his mother, stepped out.

"Not again," Barry mumbled.

"Again? What happened last time?" Kara asked.

"That is the speed force. So, there always needs to be a speedster in the speed force to keep it stable. Somehow the team tricked the speed force into thinking there is one in there. But there isn't. I was stuck in the speed force for six months, until they got me out," he replied, shivering at the thought.

Everyone ran outside.

"My little boy, we know you have left. But you need to come back, or terrible things will happen," Barry's lookalike mother, said.

"Uhh... Who would that be?" Kara and Marley asked, at the same time.

"That would be the speed force, taking the appearance of my mother," Barry replied.

"Speed force?" most people gathered around them, said.

"I'll explain later," he said, "Look, guys, I have to go. Last time the speed force was unstable, a lot of damage was caused to Central City. I can't let that happen here."

"But Barry?" Kara cried out.

"Kara, somehow, get Cisco, he can get me out, but I have no choice, bye Kara," he said, liquid starting to seep from his tear ducts, walkin into the breach.

"So, what do we do now?" Kara asked everyone.

Everyone who had stayed, Marley, Sebastian, Blaine, Kurt, and Santana, and even Mxy, were all speechless.

2 hours later*

Everyone had gone to Marley's house, after Barry had left. Millie Rose, Marley's adoptive mom, was making everyone snacks. Marley was also introducing Mxy, to her, as he was Marley's boyfriend.

Luckily, Kara was sitting outside, sad that Barry would do that, so Millie didn't have to ask any questions about why her and Marley look so alike. Kara understood why Barry had done what he had. National City was once a dangerous, destroyed place. Just thinking of the memory, made Kara shiver.

After a while, everyone came outside to comfort Kara. But they were greeted by a massive gust of wind.

They all saw a flash of red, running past them, and for a second, Kara got all happy and excited, thinking it was Barry that was returning.

Unfortunately, it was not.

A speedster, wearing a red suit, near identical to Jesse's suit, stopped, right infront of Kara, carrying two people.

"Iris?" Kara asked, as the speedster removed their mask.

"My name is Patty, Patty Spivot."

"Sorry, you just look identical to a girl I know," she said, "You must be her doppelgänger," she mumbled, quietly.

The other two people, took off their masks too.

"Winn," Kara said, hugging him.

"James," she said, also hugging him, this time, a little harder.

"Ugh, gross, no, I'm not Winn. I'm James, he's Winn," the lookalike version of Winn said.

"Yeah, I would never want to be James, he is so gross and disgusting," the doppelgänger of James said.

"Weird," Kara replied.

"I sensed someone with the speed force was around here recently, but for some reason, I can't sense them anymore."

Everyone left to go back inside, leaving Kara on her own, talking to the new guests.

"That would be my friend, Barry, he was here a few hours ago, but something called the speed force, came and made him leave."

"That isn't a good thing. The only way to get a speedster out of the speed force, is for another one to go in," Patty said, glaring at James and Winn.

"I can only help breach you in, Patty, I don't want you to get stuck in there, it would be hell for you, and you shouldn't, I won't allow it," James said, leaning over, and kissing Patty on the lips.

"Breach?"

"Yeah."

"Can you breach me to another earth?"

"Unfortunately, my powers haven't developed that far yet. But I can breach you into the speed force."

"Oh. What are your powers Ja- I mean Winn?

"I don't have powers, I fight hand to hand combat, plus, I'm the tech expert here."

"Winn, are you able to make me something?" Kara asked.

"Sure, what do you need me to make?"

"A sun grenade."

"I think I can make that. Patty, can you speed me back to base?"

"Sure."

Patty returned a few seconds later, "Winn told me, to tell you, that it'll be ready in about 30 minutes," she said, puffed.

"Great," Kara replied, "That gives us time to come up with a plan to save my friend."

"Wait, you want us to help? Okay, we'll do it, only because we have nothing else to do right now."

Kara smiled, "How are we gonna do this?" Kara was still confused about how Iris, and Winn's doppelgänger's were standing right infront of her.

"We'll save your friend, by having me swap places."

"Patty, you can't do that. I won't let you," James said, angrily, and scaredly, glaring at Patty.

"You can breach me in," Patty told James, "It will only be temporary right?" Patty asked Kara.

"Yeah, once we get my friend back, we can go back to his earth, where there is this amazing guy, who can get you out of the speed force."

"Alright, plan settled. Let's go get your friend back, Kara," she said.

30 minutes later*

Winn had returned, with the item Kara requested, and Kara had gone over the plan, with the rest of the group. No one apart from Kara, Patty, and James were needed, but Marley, Mxy, and Winn came along anyways. Everyone else stayed at Marley's house, enjoying the deliciousness of her mom's cooking.

"We should probably go, we need to do this as quick as possible, my sister is probably worried sick," Kara said.

"James, breach me in," Patty said, getting ready to save Kara's friend.

"Will do," he replied.

In the speed force*

Patty chose to wear casual clothes, instead of her suit. She walked down the stairs of a strange place. It looked like a really old house.

There he was, standing there, hunched over a body, in the middle of what looks to be the living room. Crying his eyes out, over a lifeless body, resembles his facial features.

She knocked on the wall, softly, to try get his attention.

"Iris?" Barry asked, wiping tears from his bloodshot eyes.

"Why does everyone keep calling me that?" she quietly muttered, under her breath, "Uhh.. no, my name is Patty, Patty Spivot."

Barry looked at her, confused, "Oh, you must be Iris' doppelgänger from this earth. What are you doing here?"

"I'm here to save you. If I don't mind asking, who is Iris? Why does everyone keep calling me that?"

"She would be my wife, you look exactly like her. You must be her doppelgänger. Your name is very ironic though."

"How so?"

"You are the doppelgänger of my wife, and have the name of my ex-girlfriend."

"Wow," Patty replied, stepping back to think.

"So, how are you going to save me?" Barry asked, stepping away from his mothers lifeless body.

"I am going to take your place."

"Are you a speedster, and how are you going to get out?" he asked, confused.

"Yes I am a speedster. You need to get out, go back to your earth, your friends and family need you, Kara needs you. Plus, apparently your friend Cisco, can get me out."

"That he can."

"You should probably go, before the breach closes?"

"Breach?"

"Yeah."

"Okay, thanks Patty," Barry said, finding it weird to say.

Barry ran through the breach, finding his way back to Lima, Ohio.

"Barry," Kara said, running up to him, so fast, like she was using her powers, "So glad you're okay, I was so worried about you."

"I'm fine Kara," he replied, a large smile forming on his face.

Kara squeezed him so hard, Barry couldn't breathe.

"Kara, please let go," Barry struggled to say.

"Sorry, I just got excited," she replied.

"You always get excited Kara. There is never a moment, when you aren't trying to be postitive."

"Barry," Kara said, smiling, and blushing.

"Kara, how are we going to get to Earth-1?"

"By using our speed, to open a breach."

"How would we do that? You don't have your powers."

"A friend made this for me," she said, holding up the sun grenade.

"What is that?"

"That Barry, is a sun grenade," James said, stepping forward.

"Winn?"

"James. That is Winn," Winn's doppelgänger replied.

"Weird," Barry said.

"Barry, the sun grenade will fill up the solar radiation in my cells, giving me back my powers."

"Cool," Marley said, getting excited.

"Marley, I need to talk to you, quickly."

"Yes Kara?" she asked, being pulled away by Kara, to somewhere quiet.

"If I use this, you might get your powers. If you do, it will feel different. Your ears will start to ring, with sounds from all over the city. You wi-"

"It's okay Kara," Marley replied, cutting off Kara mid-sentence, "I'll be fine, I'm sure you'll be able to teach me how to control it."

"Okay..." Kara said, her, and Marley walking back over to the small group of people, "Everyone stand back. This is gonna be bright."

Kara threw the sun grenade, covering her, and Marley, in sunlight. Kara started to hover, but Marley, she fell to the ground, clutching her ears.

"Blossom!" Mxy exclaimed, running over to her, with a concerned look on his face.

"Marley, are you okay?" Kara asked.

"Y-yeah, I think I got it under control. Woah, I can hear like everything."

"Marley, are you coming with us?"

"Kara, I need to say goodbye to my friends, they also told me that they had a surprise for me."

"Good thing that a sun grenade will keep the solar radiation in my cells, charged, so I won't need another one.

10 minutes later, at William McKinley High School*

James and Winn had said their goodbyes, and Barry promised they would get Patty back as soon as they could.

"So what do you think this surprise is?" Barry and Kara asked Marley, along their walk to her school.

"Probably the thing they do best," she replied, walking into the auditorium.

Suddenly all the lights went off, and a spotlight hit the stage. Kara, Barry, and Marley took their seats, in the middle of the large auditorium.

Kitty stepped forward, and started singing Marley's song. The song she wrote. The song that she had sung with Blaine, Sam, and Unique.

You Have More Friends Than You Know*

Kitty sung all of Marley's parts, and Blaine, Sam, and Unique sang their parts.

Santana, and Sebastian, even though they didn't know Marley well, sang the song, she had sung with Blaine, which was one of her favourites.

All or Nothing*

Marley couldn't stop blushing. She was sad, that she would leave this behind, but now she would have a sister, and learn about her family.

A shadow peered around the corner, at the back of the auditorium, staring at the back of Barry's head, and not moving their eyes.

Out of nowhere a breach opened, out came Cisco, and Alex. Kara heard the breach open, and saw everyone staring at the two figures emerging from the portal.

"Kara!"

"Alex!" she replied, running over to her, and giving her the biggest hug ever.

"Kara, what exactly is going on here?"

"Come take a seat, and see for yourself."

Barry looked over at Cisco, "Hey Cisco."

"Barry, what happened? I vibed you, and you were stuck in the speed force."

"That is all in the past, come watch this."

"Alex, this is Marley. Marley, this is Alex."

"Hi," they both said, in unison.

Kara saw someone familiar on stage. It was the doppelgänger of Adam, Ms Grant's son.

Jake and Ryder called Marley up on the stage, to sing one last song.

Outcast*

After everyone had said goodbye, Kara, Marley, Barry, Alex, Mxy, and Cisco, travelled through a breach, to Earth-1. What they didn't know is that the shadow somehow snuck in, right before the breach closed.

No one saw it, no one even knew it was there, it was someone they knew, but they wouldn't know it yet.