A/N: Thank you for the comments. MMMMK - hopefully it doesn't disappoint. Anna - Thanks!


"How are you feeling?" Astra asked as Kara opened her eyes.

"The pain has gone, almost." Kara said.

"Your powers are returning. I am afraid that is a mixed blessing. They will come for you soon."

"Then what?"

"You'll use your heat vision, either willingly or unwillingly, until you lose your powers. Then you'll be brought back here to recover."

"How long have you been here?" Kara asked.

"I have no way to track time." Astra said.

"Do you think your team is looking for you?" Kara asked.

"My team? What team?" Astra asked amused.

"You don't still have an army fighting for you?"

"No Little One. When I turned against Non, the army followed him not me."

"You turned against Non?" Kara asked.

"The you of this world gave me something else to fight for." Astra explained.

"So what about the DEO? Won't they come for you?" Kara questioned.

"I am not trusted by them. They'd rather see me dead."

"What about me? Well the me of this world?"

"She died." Astra said her eyes glistening.

Before Kara could ask further questions they heard guards marching towards the cell.

"Stay in the corner." Astra instructed Kara. Too weak to argue Kara watched her aunt going to the cell door as the footsteps neared.

"Good morning." Max greeted happily. "According to the sensors we are almost good to go. So where's the little alien?" He asked.

"Take me instead." Astra said standing between the guards and Kara.

"If you had value we would be using both of you. But you are weak and spent." Max said. "The only reason you are still alive is you may one day redevelop your abilities. But until then your niece is what we need."

"I won't let you take her." Astra said.

"How noble." Max said nodding to his guards who fired a weapon at Astra who collapsed in a heap writhing in pain.

"Leave her alone." Kara said springing to her feet, but nearly collapsing soon after.

"Do as I ask and I will." Max said.

"Fine." Kara said stumbling to the door.

"Excuse me if I don't take your word on that." He said before shooting her with a Kryptonite dart.

-00-

"You've brought…. not Kara." Cisco said as Barry emerged through the portal with Alex.

"Yeah, this is Alex. Alex, Cisco Ramon and Caitlin Snow."

"So he's the one we need?" Alex said pointing at Cisco.

"He is."

"Good. Grab your gear and let's go." Alex instructed.

"As awesome as I am, I don't just follow anyone. And you are a little scary." Cisco said backing away slightly.

"This is Kara's sister." Barry said.

"Really? You seem so un-Kara like." Cisco said earning a glare from Alex.

"It seems like a me from another Earth went to Kara's Earth a few days ago, made her think it was me, and then took her to another Earth." Barry explained.

"Do you know which one?" Caitlin asked as Cisco threw Barry a knowing glance.

"No, which is why we came to get Cisco." Barry said. "We are going to go back and figure out where she went. In the mean time can you call Oliver and ask him to come down?" He asked Caitlin.

"What's going on?" Alex asked picking up the silent exchange between Barry and Cisco.

"How do you mean?" Cisco said trying to look innocent.

"You two are hiding something. What?" Alex demanded.

"The reason I came to your Earth was because a new weapon has appeared and it has a radiation signature that is really similar to what is given off when Kara uses her special eye thing." Barry said.

"Heat vision." Alex corrected.

"Actually we call it laser vision….never mind." Cisco said intimidated by Alex.

"When did it appear?" Alex asked.

"That's the weird part. There was one case a few weeks ago. Then nothing until three days ago."

"Which was after Kara went with the other you." Alex said. "What does the weapon do?"

"We're not entirely sure." Caitlin said. The comment now putting her in Alex's firing line. "What I mean is we know what it did, but we don't think that is the ultimate purpose."

"So what did it do?" Alex asked.

"The first weapon was a small device that was detonated by a portal. It acted to keep the portal open for a prolonged period."

"How prolonged?"

"Hours."

"And that's a bad thing?" Alex asked.

"It's not great, but that wasn't the problem." Barry said.

"The second device, the one that appeared three days ago was bigger and it didn't just keep the portal open. Whoever was on the other side was using the interaction of the weapon and the portal to generate energy, which was streamed back to the other Earth." Caitlin explained.

"How?" Alex asked. "Exotic particle generation?"

"Um, yes." Cisco said confused that Alex got it right. "The interaction created a lot of exotic particles. And as you know these particles aren't stable. They are creating dark matter collisions which release a lot of energy, dark and normal. The useful energy is being sucked through the portal, the bad staying here and is tearing at the fabric of our universe."

"So Kara's heat vision is powering a type of bomb that causes a chain reaction to generate energy that is being taken by the other Earth?" Alex surmised. "Whilst leaving dark energy in this world?"

"Yeah." Barry agreed.

"And you didn't feel like mentioning this before?" Alex asked.

"Um, no. You already looked like you wanted to kill me. And we still don't know that it is Kara's heat vision." Barry said. "Although it does seem a big coincidence."

"Why are the other Earth doing this? Are you at war with them?" Alex asked.

"No. We don't think we have ever interacted with them." Caitlin said. "It is possible they think this is a safe way of energy generation and genuinely don't understand the threat they are creating."

"But the fact that they possibly went after Kara, kind of lying to her, implies the intentions aren't good." Cisco said.

"Either way we need to stop them." Barry added. "But the first step is to figure out which Earth Kara was taken to and if that is the same Earth sending the weapons through."

"Okay then grab your gear and let's go." Alex said to Cisco.

"Have we got a new boss?" Cisco asked Caitlin.

"We? I get to stay here and call Oliver." Caitlin reminded him.

-TBC...


A/N: Thanks for reading and reviewing.