Chapter 15

Kara was working at her desk when she noticed a commotion going on at the front of the office. She noticed one of the former reporters of CatCo, Siobhan Smythe, walking through the building. Siobhan had been fired from CatCo after she tried to give out information to the daily planet after Cat refused to publish it. Clark and Lois had informed her of Siobhan's actions and Kara had brought the information to Cat. This was followed by Siobhan being called to Cat's office and getting fired.

"Keira please call security and have her evicted from the building." Cat told her.

"Siobhan, you do remember that you are kind of banned from the building, right?" Winn asked trying to convince the woman he had dated for a short while that she was getting herself into trouble. Siobhan ignored him and simply pushed him aside, continuing to walk towards Kara.

"Siobhan. You're not supposed to be here. Please leave." Kara said, trying to be nice.

"You ruined my life Kara Danvers." Siobhan said before she released a sonic scream that sent Kara flying through the window and plummeting towards the ground. Before Kara could react though she found herself enveloped by a flash and outside of National City.

"You're on fire!" A man dressed in a red suit said to a still disorientated Kara. Kara quickly put out the flames on her sweater and realized that he was the one that had probably taken her here.

"You don't seem that bothered by the fact that you're on fire." The man remarked.

"I didn't need you to save me." Kara said.

"You were falling down from a building. If I hadn't saved you, you would have gone splat." The man countered.

"I have to get back to the City." Kara said, changing into her new costume. Leo had worked some new abilities into her and Astra's costumes. While they still came from the bracelets, they now completely replaced whatever they wore. The downside was that it was more of the suit, getting rid of their normal clothes so they would have to get a new set of clothes after. She quickly flew off back to National City.

"That was a new one. I thought I was the impossible." The man in the red suit commented before running after Kara. Kara was surprised to see him running at such speeds and landed next to him.

"How did you that?" the man asked, stopping his run when Kara landed.

"I'm Supergirl." Kara said as though the answer should have been obvious.

"You're who now?" the man inquired not understanding what she meant. Kara however took a while to answer, her ears still ringing.

"Sorry I'm still a little disorientated from the scream. How did you save me?" Kara asked.

"Well you fell out the window and I caught you and ran you all the way out here. Which I did not mean to do but after working on my speed I guess I'm faster than I thought." The man said.

"Yes, but who are you?" Kara questioned.

"I'm the flash." The man responded as though it was just as obvious as Kara's earlier response to his question.

"The who now?" Kara said, not knowing what his answer meant.

"Wait do you not know who I am? What about the green arrow? Black Canary? Firestorm? Atom? Zoom?" The flash asked, listing off the names of the heroes from his earth that Kara did not know. Kara apologized to him but Barry just gave her a look of shock.

"Not as sorry as I am. I'm Barry Allen, the fastest man alive. Also, I think I'm on the wrong earth and I'm going to need your help." The flash said, taking off his mask and revealing his identity. Any further conversation was interrupted though when a screech filled the air and a bird made entirely of flames landed nearby Kara. The flames dissipated to reveal Leo in his Rogue suit.

"Supergirl, are you alright?" Leo asked. Kara nodded at him before gesturing to Barry.

"This is Barry Allen. And he claims to be from another earth." Kara said.

"That would explain the large energy surge I detected earlier. He probably tore a hole between the dimensions." Leo said.

"Okay, so you seem to understand what's going on here. But can I know who you are?" Barry asked.

"My name is Leo Titus also known here as the hero Build." Leo introduced.

"Since we're doing the whole introduction thing, I'm Kara Titus. I'm Supergirl." Kara followed.

"Same last name? Are you two related?" Barry inquired.

"Nope he's my husband. We just got married about a month ago actually." Kara said.

"I think we should continue talking somewhere a little nicer. I'll see you back at the hideout. Get Winn and James in too. We need to address Siobhan's attack on you as well." Leo said, taking out the Phoenix Fullbottle from the holder on his belt.

"Phoenix, Discharge Bottle. Discharge Crush." The Sclash driver announced before Leo was engulfed in flames and took off into the sky towards the DEO.

"That is so cool." Barry commented.

"Come on. I'll bring you to the hideout so you can explain how you got here." Kara said, taking to the air and motioning for Barry to follow her.

"You guys have Central City but no star labs. No Cisco Ramon, Harrison Wells or Caitlin Snow. No one who might be able to help me get home." Barry groaned out at one of the computers in the hideout.

"Don't worry. I'm sure Leo can help you figure something out. I still don't understand how this whole alternate earth thing works." Kara remarked. Following her remark, Leo walked in together with James and Winn.

"You alright Kara?" James asked.

"I'm fine. What happened to Siobhan?" Kara asked.

"After she went all Mariah Carrey on your ass, she left." Winn answered.

"I don't really know how to explain this but this is Barry Allen and he is from another earth." Kara said, gesturing to Barry who gave an awkward smile.

"Wait, the theory of the multi-verse Is true?" Winn asked, his face lighting up in interest.

"Oh yeah it is. Basically, there are multiple earths that all occupy the same pace. But they vibrate at different frequencies so they can't see each other. On each earth, something different happened." Barry said, drawing a diagram on the board behind them.

"Like Kennedy not getting assassinated, the Nazis winning world war two and any other possibility. Ordinarily the earths are separated due to their different oscillating frequencies. However, it is theorized that you can travel between the earths if you go fast enough." Leo added.

"I find that a little hard to believe." James said.

"I know. I can't believe it either and I'm from another planet." Kara concurred.

"Wait, you're from another planet?" Barry asked.

"Oh yeah, she's an alien." Winn pointed out.

"Does that mean you're an alien too?" Barry asked Leo.

"Oh no. My situations a little complicated. I'm a human whose body is slowly being enhanced by an alien power source." Leo answered.

"Right before we get sidetracked, how did you get fast enough to tear a hole between the earths to end up here Barry?" James asked, getting them back on topic.

"Well…I was struck by lightning the night a particle accelerator exploded and became a superhero." Barry said, running out and getting them all ice cream.

"So, you can just pop between the different earths?" Winn asked.

"This was actually an accident. I was working on my speed before I somehow ended accidentally crossing over to this earth. The same thing happened before actually except that time I ended up accidentally travelling through time." Barry admitted.

"Don't worry. We'll help you find a way home Barry. Like you mentioned. It should just be a matter of finding the right speed for you to hit to tear open a hole that will lead you to another earth. The hard part will be hitting the speed required that opens a breach that leads back to your world and not one of the other earths. Until we can figure it out, I guess you should get yourself settled in." Leo said.

"Right. Thanks a lot for the help. Just one thing I need. Food. I need to consume about 10000 calories in a day." Barry said nervously.

"You bumped into the right couple then. Kara there has a bottomless pit for a stomach and Leo keeps her fed and happy." Winn said, gesturing to the couple. Kara gave a knowing smile to Leo.

"It seems like my wife is currently craving for some donuts. That okay with you Barry?" Leo asked as Kara let out a cheer.

"Sure, who doesn't like donuts?" Barry questioned rhetorically.

"Great then let's go find Cat and tell her that you will be stepping out of the office for a moment." Leo said, pulling Kara along with him towards the elevator to head to her desk, the others following behind.

"Keira, I see you survived the fall. Not that I'm surprised. Please come inside here, I need to speak to you." Cat said when she noticed Kara going to her desk. Kara, Leo, Barry, James and Winn entered Cat's office.

"It seems we have a new superhero in National City. The same one who saved you Keira. Since you were part of the incident, I want a firsthand account of the events. You will give information of it to no one. James, I want pictures of our new hero. Winn, Keep an eye out for any information or sightings on the web. Now we need a name for this guy. The whoosh? No. The Blur." Cat said.

"How about the flash?" Barry suggested.

"That sounds like someone whose power is to leap out of dark alleys in a trench coat. No. I want mystery I want intrigue I want The Blur. Also, who are you?" Car asked, finally taking note of Barry.

"He's Barry Allen. I met him at a conference in Chicago and we've been friends since. He's staying over for a short while before he heads home to Central City." Leo answered smoothly. Cat nodded before shooing everyone out of the office.

"Kara, we have a problem. Livewire broke free." Leo said over the phone.

"But how? I thought she was being held by the DEO?" Kara asked.

"She was. Keyword being was. Siobhan broke her free. She escaped though the power grid before I could respond. Siobhan probably figured out her location when she was brought to the DEO by you and Winn for treatment after she fell off the building. I've texted James to keep a lookout for her and see if he can find out anything about Siobhan. Winn too. You need to be careful. It won't surprise me if they both are working together. You and Cat Grant will their most likely targets. Be careful." Leo warned.

"I will. I'll try and get Ms. Grant to safety then head over to the DEO so we can work on putting both Siobhan and Livewire away." Kara said, ending the call before walking into Cat's office.

"Ms. Grant you need to pack a bag and head for the airport with Carter. Livewire's escaped. You know she will be coming after you. I'll have everything arranged for you." Kara suggested.

"I am staying put. I did not get to where I am by cowering in fear. Besides I defeated her once before and I can do it again." Cat said, her expression mirroring her firm decision. Kara simply gave a shocked look at the last part of what she said. Cat rolled her eyes and amended it.

"Okay fine. I had help. I'm certain I will have help again. I have faith in Supergirl. And don't discount Build either." Cat said. Hearing that statement, Kara told her she would be stepping out of the office for a moment. She rushed down to the hideout to find Winn and Barry there.

"I need help. Livewire's escaped and I believe she's working with Siobhan. We need to get to the DEO so we can work on catching them. If you don't mind of course." Kara said to the two, directing the last part to Barry who shrugged and asked her to lead the way.

"This place is awesome." Barry said, running around the DEO.

"Is that a spaceship?" Barry asked, pointing to Kara's ship in the corner of the room.

"Supergirl and I see you brought our earth hopping guest. Agent Titus has already briefed us on who he is." Hank commented as he Alex and Leo walked up to meet them.

"Have we found anything on Livewire?" Kara asked.

"We have managed to get a fix on her location. Me and Alex were able to isolate the power surges in the City's power grid to track her location. While this may be a good indicator of where she is, it's no guarantee that she's still there." Leo said, bringing up a map that showed Livewire's last detectable location.

"An abandoned warehouse? What is it with bad guys and abandoned warehouses?" Barry commented.

"Livewire may have been smart enough to cover her tracks by walking on foot and given the fact that her associate doesn't seem to have the same capabilities I would think that it's a good possibility." Alex raised.

"Have you run the algorithm to search the cameras for her?" Winn asked. Leo nodded and told him they hadn't managed to find anything.

"I guess we have no choice but to search the warehouse then. Where's Aunt Astra?" Kara asked.

"She is currently out tracking one of the Fort Ross escapees who has been using their ability to manipulate people into stealing things for him. It's a simple mission that she said she could handle herself. She should be back soon though. Do you want to wait for her or handle Livewire and Siobhan first?" Leo asked.

"We should deal with Livewire and Siobhan quickly. The faster we put them away the less people will get hurt." Kara said.

"Good luck then. I can't authorize a formal strike team as they are still considered humans." Hank said.

"This is Astra requesting assistance. I've managed to track down the alien and he's apparently part of something bigger. The parts they've been stealing is for some sort of alien bomb. Based on the looks of things, I think they're nearly done with it too. I've managed to locate their base and thought that some help would be nice just to be sure." Astra's voice came over the comms.

"I'll go. Kara, you and Barry handle Livewire and Siobhan. Good Luck." Leo said, transforming into his Rogue armor before heading out to where Astra was.

"That was so cool!" Barry said, referring to Leo's transformation.

"Come on we need to get going." Kara said, turning Barry's attention to her.

"Wait, do you two even have a plan for stopping Livewire? How about the Capacitor you wanted to trap her with the last time?" Winn brought up.

"That thing was destroyed and we have no time to wait to make a new one. Hopefully the building has a water source so we can use it to make her fry herself." Kara said, explaining her plan. She and Barry then left the DEO to see if Livewire and Siobhan were at the abandoned warehouse.

"That could have gone much better. I can't believe they got away." Kara groaned when she and Barry returned to the DEO.

"That was partially my fault too. Didn't think Livewire could absorb my lightning. So, we kind of started the fight on the wrong foot. Also, you probably weren't expecting Siobhan and her scream to work so well against you." Barry said.

The two of them had gone to the abandoned warehouse and at first only found Livewire there. Barry had tried to use his lightning on her but that backfired on them. It only served to strengthen her and allow Livewire to shock Barry and incapacitate him for some time. Kara had tried to use the sprinklers in the warehouse against Livewire but that failed when Siobhan made her presence known, using her screech to disorientate Kara. Kara and Barry were able to mount a counterattack though, Barry spinning his hands fast enough to create mini tornadoes and Kara using her freeze breath to send the villains back. However, the villains took the opportunity to get away.

"I take it that you both didn't manage to get Livewire or Siobhan?" Leo asked as he walked into the room with Astra behind him.

"Barry, this is my aunt Astra. And no, we didn't manage to get Livewire or Siobhan. A mistake on our part. We weren't expecting them to cooperate very much. I mean they weren't chummy with each other but they at least knew to have each other's backs. Siobhan, or as she called herself Silver Banshee, used her screech on me before I could use the sprinklers to short out Livewire." Kara said, retelling the events of the confrontation to him.

"Did you manage to stop them from finishing the bomb?" Kara asked.

"We were successful on the mission little one. The bomb has been dismantled and the DEO team is working on bringing it back here for study. The aliens involved have also been detained. But I think we should be focusing on stopping Livewire and this Silver Banshee." Astra said, appraising Barry for a moment before addressing Kara.

"They'll be expecting me and Barry to confront them the next time they show up. You and Astra can catch them by surprise." Kara suggested.

"We should probably do something about Silver Banshee's screech though. I don't think I have anything that can really counter it. It's not something I've encountered before. And while any of us could probably take her down faster than she can use it on us, I'd prefer to have something in reserve just in case." Leo said.

"I think I might be able to come up with something if I have the right materials. I've fought someone similar. If I could get an analysis of Silver Banshee's shriek I can probably adapt it to block her." Barry brought up.

"Winn can help you with the analysis. Whatever you need should be available here. Just ask." Leo said, gesturing to Winn who nodded and quickly got to work. James walked into the DEO and approached them.

"I did some digging with Winn's help and well apparently Siobhan's family is cursed by a banshee." James said, pulling up some articles he had.

"Cursed by a banshee?" Kara asked incredulously.

"Yes. All the females in Siobhan's family are cursed. If they are ever wronged, they need to get rid of whoever wronged them or a voice inside their heads will eventually drive them insane." James said, pointing to the various articles that involved female members of Siobhan's family.

"So, we have a potential nutcase to deal with. Great. No offense Winn, but I think the Siobhan you knew is long gone." Leo said.

"None taken. She never really was the same since she got fired." Winn said, pausing from his work for a moment before continuing.

"I guess all that's left now is to wait and see if they turn up or if the algorithm manages to find anything." Leo said, taking out the Crocodile Fullbottle and letting the armor dissipate. He went to get some food for everyone while they made themselves comfortable for the inevitable wait.

"And it's done. This should serve to shield us from Silver Banshee's screech." Barry said holding out a set of earpieces. Kara, Leo and Astra each received a set. Kara heard her phone ringing and saw that it was James trying to reach her. James had gone back to CatCo to help them keep an eye out for anything.

"This is bad. Livewire and Silver Banshee have taken Ms. Grant." Kara said. They were about to rush out before Livewire's face appeared on the screen as she made a citywide broadcast.

"Hey Supergirl, unless you want Cat Grant's blood spilled all over National City Park, you would come here now." Livewire taunted.

"Stick to the plan. You and Barry pull them away from civilians. Astra will help with Silver Banshee. I'll take down Livewire when I get the chance." Leo said. Kara and Barry nodded, leaving ahead of Leo and Astra.

"Hey sparky, shrieky! Hi." Barry said when Kara and he arrived at the park. Cat was handcuffed to a park bench behind the two villains.

"What do you say we step away from the nice lady and settle this like women?" Barry taunted. Kara gave him a questioning look.

"In my defense, there's more of you guys here than me." Barry countered.

"Kill them both." Livewire said. Silver Banshee used her scream on the two heroes by Barry's device worked, shielding the pair from the effects of the scream.

"What's wrong lose your voice?" Kara taunted.

Barry used their shock to quickly push the two villains apart as Livewire tried to zap both him and Kara. Livewire used the powerline to move to the top of a nearby apartment building, Barry hot on her heels. Kara delivered a swift uppercut that sent Silver Banshee tumbling away. Astra quickly took the opportunity to take Silver Banshee, shoving her away from civilians while they engaged in a brief fight that ended up with Silver Banshee unconscious on the ground. Kara meanwhile went to free Cat Grant. Barry was running around Livewire, delivering strikes as he went that didn't serve to do more than annoy her. It served as distraction enough for the opening Leo needed.

"Fullbottle. Funky Attack!" the purple colored handgun in Leo's hand announced when he inserted the Whale Fullbottle into it. The announcement caused Livewire to turn and look at him as he floated in the air with the hawk wings, the gun pointed straight at her. Leo pulled the trigger and a large burst of water emerged from the gun and hit Livewire causing her to shock herself into unconsciousness. The crowd cheered as the heroes landed in the middle of the park with the downed villains, thanking them for saving the city once again.

"So, what happened to Siobhan and Leslie? Are they locked up in the DEO again?" Winn asked as he James and Kara were at Kara's desk watching the news broadcast of the heroes saving the day from Livewire and Silver Banshee.

"Nope. Thanks to Barry, the National City Police Department is now able to lock up metahumans." Kara said as she continued to happily watch the newscast. She heard her phone ringing and saw that Leo was trying to call her.

"You know, your happiness is extremely infectious. That aside, I've found a way to get Barry home." Leo said through the phone.

"That's wonderful news. When will he be going back?" Kara asked.

"Well now that he's done helping the NCPD, we're just waiting if you're free before we send him home. Can you meet us outside the City Limits? Same place Barry dropped you off when you fell out of the building? I'll explain when you get here." Leo said. Kara hung up the phone, telling Winn and James to help cover for her before she went off to meet Leo and Barry.

"So how is this going to work?" Kara asked as she landed.

"The device Barry has on him? Turns out it can act as a beacon to guide him back to his earth. He just needs to go fast enough to break the dimensional barrier." Leo said, pointing to the metallic ring around Barry's chest.

"Basically, we need to work together so I can achieve the speed necessary to break through the barrier. The two of us will go at our top speed then you'll throw me forward. In theory, the speed should be more than enough to allow me to break through the dimensional barrier." Barry said.

"So, you now get to race the fastest man alive. Or claims to be." Leo said with mirth, feeling Kara's excitement through their bond.

"It was nice meeting you Barry." Kara said, a little sad to see him go.

"it was nice knowing all of you too. But hey, maybe someday I can come by for a visit and help out again." Barry replied.

"The same goes for us right Leo? If you ever need help with anything, feel free to come and get us." Kara said, Leo nodding in agreement. Kara gave Barry a hug in goodbye before Leo came up to shake his hand and give him a pat on his back.

"Alright, on your marks, get set, go!" Leo announced, before the two sped off. Once they were both at their top speed, Kara smiled at Barry and gave him a strong shove, Barry tumbling forwards before being engulfed in a bright light and disappearing. Kara stopped and gave a smile into the distance.

"Goodbye Barry." Kara said. It was a few moments later when Leo joined her in his Rogue form.

"Something tells me that won't be the last we'll be seeing of him." Leo commented, Kara agreeing with the sentiment.

And that's the end of the Crossover episode with the Flash. Next week's update will see the start of season 2. Thanks for all the support so far. Once again, I need inputs for the below plot topics.

1) Should Sanvers stay together?

This is an important plot point and I'm leaning towards keeping them together. But if enough people feel I should make them split up like in the series I have my own ideas for that.

2) Should Kara and Leo have a surprise Baby?

I've worked out that this is possible but requires me to lengthen the gap between season 2 and 3 to about 1 year and 6 months instead of just six months. this is just a cute side of the story that I might consider adding in if enough readers feel I should.

3) Evolt or Mad Rogue and Blood

For Leo's earth X counterpart, should he be Evolt or Mad Rogue? This will have implications as if enough readers think I should do an Evolt then I'll push crisis on earth X back to post Reign.

I have come up with a new plotline that keeps Crisis on Earth X where it is right now, using Mad Rogue as Leo's counterpart. This plotline will then feature Kamen Rider Blood as the final Big Bad after the gang has dealt with Reign!

5) I'm considering secondary riders but they'll only come after Leo gets his Genius form. Below are the options for secondary riders. I would like recommendations on who they should be. Some candidates I have in mind include Alex, Maggie and James.

Cross Z Charge with eventual transition to Magma.

Grease with eventual transition to Grease Blizzard.

Rogue with potential transition to Mad Rogue