"So, you guys all packed for Central City?" Oliver asked Laurel and William, who had begged to come with them when he heard they were going to visit the Flash.
"Yep." Laurel said and William nodded as well as he slung his duffel bag over his shoulder.
"Good. I'm hoping that Star Labs has something to help my hand." Oliver said.
"Considering that once your hand is all healed up, John is going to have to give up the hood again, maybe you should see if Cisco can come up with something to help lessen the blow." Laurel said and Oliver nodded.
"I already talked to him about that. He said he has something waiting for us in Central City." Oliver said as he turned out the lights of the loft and they walked out.
"Wow, this place is incredible." William said as he, Oliver and Laurel entered Star Labs.
"Hey Oliver, Laurel, it's great to see you guys and you must be William." Barry said as he shook hands with Oliver and hugged Laurel.
"Hey Barry." Oliver said.
"So, what brings you guys to Star City. I know it wasn't a vacation." Barry said.
"No, I think I've discovered a side effect of my sonic powers. Is Caitlin around?" Laurel asked.
"She's in the medbay." Barry said as she walked over there.
"Wait, this guy knows about Laurel's powers?" William asked.
"William, I'm surprised you haven't figured it out by now." Oliver said, since William had already proven to be as smart as Felicity.
"What?" William asked and Oliver just looked at Barry.
"Show him. He already knows the identities of my team, I think he can be trusted to keep yours to." Oliver said and Barry nodded.
"Show me what?" William asked, right as Barry just sped around the lab, leaving a trail of lightning behind him.
"You're the Flash." William said.
"Yep. And your dad is the one who helped teach me how to fight." Barry said.
"Is that true?" William asked his dad.
"Yep. If it weren't for me, this guy probably would have gotten himself killed due to over relying on his speed." Oliver said.
"But did you have to shoot me with arrows?" Barry asked.
"It helped you learn though didn't it?" Oliver asked as William looked at the two men in awe.
"So, what can I help you with?" Caitlin asked Laurel as she sat down on the medical table.
"Lately I sometimes feel like everyone is shouting at me when really, they're just talking to me at normal volume and since my powers are sonic based, I think it might have something to do with it." Laurel said and Caitlin nodded.
"I'll begin running tests to see if we can pinpoint the cause." Caitlin said as she began running tests on Laurel.
"So how are things back in Star City?" Caitlin asked.
"Well, Oliver is no longer under indictment and we are slowly ridding Star City of Diaz's influence, bit by bit. Soon he'll have nothing left." Laurel said as Caitlin took a sample of her DNA and began running tests on it.
"That's strange." Caitlin said.
"What's strange?" Laurel asked.
"I'm examining a sample of you DNA and while your cells don't possess any traces of dark matter, there is a strange component in it. Unlike anything I've ever seen before." Caitlin said.
"So, is it a problem?" Laurel asked.
"No, it looks like whatever this mutation is, it's giving your cells the ability to regenerate, along with giving you sonic based powers, including your canary cry, but it also looks like it's mutated your drums to." Caitlin said.
"What does that mean?" Laurel asked.
"It means that your hearing has been amplified tenfold, but fortunately, like your canary cry, it has an on and off switch. I think you might actually be able to turn this into another asset." Caitlin said.
"How?" Laurel asked.
"With the right training, you could use this power for something called echolocation." Caitlin said.
"I'm a lawyer turned cop/vigilante, not a scientist. I don't know what echolocation is." Laurel said.
"Right, well basically, you can use this power to able to detect movements and noises from great distances while likewise able to determine where they are coming from, along with using it to potentially track targets and even give you and your team an early warning for sneak attacks." Caitlin said.
"How do you know so much about this, sounds like more than just the science." Laurel asked.
"Let's just say that we recently encountered someone with these same powers and they were not on our side." Caitlin said.
"Who?" Laurel continued to push, since she could that Caitlin was trying to go lengths to avoid telling her.
"Come on, it's better we tell both you and Oliver at once, since you both have a right to know." Caitlin said as they walked out into the cortex, where Oliver and Barry were talking.
"So, we good?" Oliver asked.
"Actually, there's something we need to tell you guys in regards to Laurel's new powers, since she seems to have developed an echolocation power, just like Siren X." Caitlin said.
"Who is Siren-X?" Laurel asked.
"Oliver, you remember Earth-X?" Barry asked.
"No matter how hard I try to forget it, why?" Oliver asked.
"Wait, what's Earth-X? I'm guessing it's another Earth like the one you said Harry's from." Laurel asked and Barry nodded.
"Yeah, but Earth-X is not cool like Earth 2. Until recently, it was an earth ruled by Nazis." Barry said.
"Wait, Nazis?" Laurel asked.
"Apparently on Earth-X, the Nazis won World War 2 and ruled Earth-X until recently." Oliver said.
"You didn't tell her the best part." Barry said.
"That's because I still don't like to think about it." Oliver said.
"What?" Laurel asked.
"My Earth-X doppelganger was the leader of the Nazis and he led an invasion of this Earth." Oliver said.
"And his timing was just wonderful." Barry noted.
"Hey, at least you didn't have to fight an evil Nazi version of yourself like Kara and I did." Oliver said.
"Anyways, it turns out that you, Kara, Tommy, Sara, Alex, Snart, and Lance weren't the only ones with Earth-X doppelgangers. So does Laurel, and sadly, it seems like Earth 2 wasn't the only Laurel who was evil." Barry said.
"Wait, my Earth-X doppelganger was evil?" Laurel asked.
"Yeah, she was actually a member of the New Reichsmen and she has the same powers as you, just more advanced." Caitlin said.
"How do you know that?" Oliver asked.
"Because we met her when we went back to Earth X to get Leo's help for something and now she is currently locked up in the Pipeline until we hear from Earth X about what they want to do with her." Barry said.
"Sounds good. But anyways, while we're here, maybe you guys can see if you can help Laurel get her powers to that sort of level." Oliver said.
"Happy to." Barry said and Caitlin nodded her agreement.