Everyone at Star Labs was trying to think about what they could do to stop Nazi domination over their Earth, some even giving some ideas, a few of them not so great ones. Alex was standing in an empty corridor, thinking about everything. She came up to this Earth with her sister so she could get away of craziness for a while, to try to recover from the deep hurt she felt when she had to let her fiancé go because they wanted different things in life. And here she was, standing before crazy all over again. And she couldn't forget the night she had kissed Sara in a very drunk moment that she was sure she would repeat if she was sober, and the guilt... The guilt ate her inside because her break up was so recent. She knew she was free to be with whoever she liked, but she still felt funny about it. There were footstep noises coming her way and she looked up to see who it was. She smiled shyly as she crossed her arms on her chest.

- Hello! – She said

- Hey you... - Sara smiled back – Are you ok?

- Yep... Totally – Alex tried to disguise that she was not ok at all, something Sara must have read on her face.

- I don't buy it! But... If you want to talk. I'm here. – She said as she was turning around, about to leave back to the cortex.

Alex took a deep breath. All of them from this Earth were strangers to her, but they were stuck together in a fight against Nazis from another universe, she had kissed Sara in a dark alley... She was tired, tired of hiding, tired of wondering. She decided she wouldn't be like that anymore. She needs to be honest with herself and with others around her. The first step was telling Maggie what she really wanted, because even if she loved her so much, she wasn't going to be the sad woman that gives up all of her dreams for somebody. She was finally putting herself first.

- I'm not. And I'm sorry I practically ran away from you that night, it had nothing to do with you, it was something personal...

- Well, I'm glad to know that it wasn't about me – Sara teased Alex with a smile and then she kept going on with a more serious tone – But... We shared a kiss; it doesn't get more personal than this. I see that you are struggling... Again, if you want to talk, I'm here to listen.

Alex stared deeply into Sara's eyes. How could that woman she barely knew, could read her so well? Kara told her Sara had no super power other than being a really great fighter and being good at cheating death (this one got her really curious, Kara didn't know the details, and she really wanted to ask her someday, if she got the chance).

- How... - Alex began – How do you do this? I barely know you, and you can tell exactly what I feel...

- I know a broken heart when I see one.

Alex was about to answer when Oliver's voice came into the comms. They were an open line, so everyone could talk at long distance if they needed to. Alex looked at Sara as she heard his message.

- We can talk about this later – Alex said as they rushed back to the cortex.

Once everyone was back to Star Labs, they were all in desperate mood. Felicity and Cisco were at the computer trying to get any clue about where Jax might be. Stein got up from where he was sat and walked to Cisco, tapping him on the shoulder.

- If the Nazis took Jefferson, they are probably on their Earth... I need you to open a breach there.

- Wait, Professor Stein, I know this is hard. We all know it... - Cisco said as he turned his chair around – We need to be sure where he is so we don't waste any time.

- Mr. Ray! Not you, the other – Stein said as Ray Palmer got up and sat down again – You are from there, you know those Nazis... What do you think?

- I think... No, I'm sure that they might be back to my Earth with Jackson. They want me, it makes sense they take one of you.

- Do you think they will offer a trade? – Felicity asked while she had literally no trace of Jax anywhere in the country.

- I think... But we won't give in – Oliver said as he approached everyone.

- But Jefferson... - Stein looked at Oliver when he was interrupted by Kara.

She walked towards him, putting one of her hands in his shoulders.

- We will save him. But if they truly ask for a trade, we can't just put an innocent life in danger to save another.

- We need to do things in a way that we can save him and keep Ray safe as well. – Oliver said as he looked at Ray.

- We can't be separated for a long time... - Stein walked from side to side, almost bursting in anger – Jefferson is in great danger, we cannot waste any more time thinking. We need to act!

Stein was about to walk out of the cortex when the computer just went off with strange symbols. Cisco and Felicity looked at each other, trying to understand what was happening.

- It's your house, I have no idea.

- Neither do I – Cisco said while getting desperate – It never happened before, I...

There was some static going on the screen and then Overgirl appeared with her mask on.

- These red eyes thing creeps me out – Cisco whispered to Felicity

- Greetings! – Overgirl said in a deep cold voice – We have your friend with us, and I suggest you give us Ray or this nice young dude will keep Ray's friends company... as good as dead! Do as I say and your friend shall live, give us Ray by the end of this day, or suffer the consequences. We won't stop with your buddy, we will bring down everyone you love and care about. You have been warned!

The screen went back to static and everyone stood where they were, in shock.

- At least we got one thing right, they want a trade... - Felicity said as she looked at everyone's faces.

- And they won't get one! – Kara said as she turned from the screen to face the others.

- This might confirm Dark Flash brought him to Earth X. Speedsters like us can open breaches to other universes, so it made sense he was the one that went after Jax.

- And Overgirl and Dark Arrow are still here on this Earth. She wouldn't be able to hack us being in another universe – Harry said – And I bet anything you want that Dark Arrow is with her...

- So, that's perfect. We know for sure, we can all go and... - Stein said as he looked back at Oliver that interrupted him.

- We can't go blindly to an Earth full of Nazis knowing nothing about how to stop them. We might not help Jax but make things worse.

- But I...

Stein's voice was weak and full of desperation. It was heartbreaking the look on his face and Kara was starting to feel his pain as she remembered every time she had to keep calm while someone she loved was in danger. It reminded her of when Alex got kidnapped by the lunatic that went to school with them. She was ready to do whatever it took to save Alex. She could understand what Stein was feeling.

- I promise we will get him back, Professor Stein – Kara said as she noticed the desperation in Stein's voice. - I know how that feels, I've been there. Once, they took my sister, and blackmailed me. I almost lost her and I was ready to take down a wall if I needed, I went over my head trying to fix things, and it backfired. And I learned the hard way that sometimes, we have to take a deep breath and try to think clearly. It wasn't easy, but it was worth it. It will be worth it, and we will save Jax – She said with a smile on her face

- And I think I know how... - Harry said after being quiet in a corner, thinking to himself.

He walked towards the glass blackboard and drew a few circles on it.

- We have all those different Earths right? Even if things on them are different than ours, we have super powered people I think in mostly all of them. But sometimes, we have doppelgangers with similar things between them. Overgirl, Dark Arrow and Dark Flash are proof of that. They have the same abilities as Kara, Oliver and Barry. If they have the same abilities, they might have the same weakness.

- We just need to figure them out and use it against them... Brilliant! – Cisco said, clapping his hands together as he looked at Ray. – Tell us more about them, if you have any information... It can help.

Ray looked thoughtful as he gathered all information he had on that trio.

- Kara is a kryptonian, she was raised by Germans as her cousin Overman did. She can't be around green kryptonite; it can harm her but Nazis knows it so they hid it all so no one could take her down.

- Well, she is exactly like me then... - Kara said as she smiled at everyone – We have a way of taking her down... On my Earth!

- Kara... J'onn got rid of all kryptonite we had, as your cousin asked... - Alex said

- But you know who still has it. They used to harm me and... - Kara stopped abruptly as she remembered when Cadmus captured her and Mon El. – Well, you know...

Alex looked at Kara with a terrified face as she walked towards her sister in a disapproving way.

- There is NO way! No! No way!

- What's happening? – Caitlin asked, feeling confused with their talk.

- My sister is insane, that's what's happening – Alex crossed her arms.

- We can manage to get it from there! You know it!

- It will be dangerous! Especially for you. NO WAY!

Oliver and Sara looked at each other with a knowing look. Oliver looked back at the Danvers sisters arguing as he walked towards them.

- Can I ask you what are you two talking about?

- There is a place on my Earth called Cadmus. They hate aliens. All aliens. They tried to kill Kara multiple times, they are evil. But they stole some kryptonite, to try to harm Kara and Clark, her cousin that is also a kryptonian. – Alex explained – And by the look Kara is giving me, her idea is to go there and take it from them.

- Well, we could make a weapon of it so we could take Overgirl down! – Felicity said as she thought about many ways they could make it happen.

- Whatever you need to do, do it, we are wasting precious time and Jax might be suffering right now! – Stein said abruptly and with no patience as he walked out of the cortex feeling really mad and frustrated.

Caitlin went after him as he looked at the others, reassuring them she got this. After a few seconds, Alex turned to Oliver as she thought about something.

- The DEO is perfectly capable of holding Overgirl. We deal with all kinds of things our police department can't. But you – Alex pointed at Kara – you need to stay away from it. I don't want you near Cadmus again. It might get you killed for good this time!

- I can break in there and steal the kryptonite! – Oliver said as he looked as Kara, that looked back at him in a shocking way. – They have no idea who I am, won't be expecting so I can use the element of surprise against them.

- You need lead to hide it, or she will be able to see it – Kara said in a serious voice. She didn't seem ok with all of that but kept it to herself

Cisco had the idea to make a syringe to put the kryptonite on, since it was her weakness, they could inject on her somehow. Curtis and Felicity went to help him.

Caitlin looked all over the lab just to find Stein sat alone in an empty training room, with teary eyes. She sat beside him, putting her right hand on his shoulder.

- I can't lose Jax! – Stein said in a sad voice. – I've grown to see that young man as my son. I'm not even worried about me; I'm worried about his mother...

Caitlin just kept listening while Stein talked. She felt he needed it, but it wasn't feeling like sharing stuff like that with people he barely knew or was used to besides his team.

- He tells me about his mom, and how he wanted to help her and give her a better life since he was a kid. And he has a great future... I can't help but think what if... What if...

- Hey... - Caitlin said as she looked at him – Don't think like that... I know it's hard but they have a point. We got our ass kicked before, imagine how it would be if we just go to Earth X and try to beat them...

- I know. I just can't help but feeling impatient. I don't like sitting around waiting.

- Neither do I. But we need to trust the team. All of them.

- I do. I just... I'm worried.

- I know.

She smiled as she hugged Stein and then got up.

- I'll give you some time alone, I think you need it...

- Thank you Caitlin.

- Don't mention it. – She smiled as she left the room and went back to the cortex.

Kara was feeling impatient as others worked on figuring out the weakness on Dark Flash and Dark Arrow. She couldn't help but worry about someone evil that had the exact same powers as her flying around Earth 1 and putting everyone's lives at risk. She was also worried about Oliver going to break into Cadmus to steal kryptonite. And there was nothing she could do to stop him because she noticed he was stubborn and everyone else liked the plan. She felt more frustrated than ever.

Caitlin and Harry were analyzing Barry's speed and noticed something weird. Ever since Barry went back from Speed force, he has been different, faster, better. It was really weird that out of sudden he wasn't able to be faster than some other speedster, unless his doppelganger also spent some time on the speed force. Ray confirmed to them that Dark Flash was never away, always terrorizing people.

- Barry, you don't remember anything from your time there? – Nate asked as he looked at the computer.

- No...

- Something kept you from reaching your full potential, because your vitals are normal! – Harry said – And I have seen you at your worst. You can totally beat that guy, he is not faster as you are and this here, and my friend – He pointed at the computer analysis of the other Flash – is living proof!

- I think I know what kept me from defeating him back in town square... - Barry lowered his head as he remembered that huge fight - I think I feared it was the same for him, being trapped, being back better and faster. How would I win against someone exactly like me?

- That's the thing... He is not! – Harry said as he smiled in a confident way.

- Killing him is out of option... - Barry said as he thought about his options – But maybe... Maybe we can do with him what we did with Savitar.

- Interesting... - Caitlin said as the others looked at her confused.

- It's a long story guys, but I think we might have a way of dealing with him... - Barry said vaguely

- Now... What about Dark Oliver? – Nate asked

- Well... If he is anything like our Oliver, it will be as hard to deal with him as any meta human. – Barry said.

- We can't kill him! That's for sure!

Kara came walking in as she heard the others talking about how to deal with those Nazis.

- I want to deal with him! No interferences! From anyone – Oliver said with a serious look as his eyes went through everyone and stopped in Felicity's blank face.

- Are you insane? – She asked as she got up, standing in front of Oliver. – Are you actually insane?

- No! I'm not insane! I want to deal with him! And I will.

- You can't... You'll get yourself killed! This is a Nazi version of you Oliver... A NAZI!

The room was suddenly quiet. The air felt thick and everyone felt discomfort as Oliver's and Felicity's voices got higher.

- I can deal with a human being that has similar skills than I.

- I don't think you understand! If he has your strain, we all can worry...

- That meaning?

- He won't hesitate in killing you! – Felicity said and she regretted it immediately.

- The same way I wouldn't! Because I'm a killer... I got it, and I'm still dealing with him, Felicity! – Oliver's voice was calmer than ever, a bit cold and it gave Kara chills. She never had seen someone so pissed off, but as soft as she was seeing Oliver right now. It was scary.

- Oliver, I'm sorry...

- Here's the thing, if he is anything like me, I am the only one who can understand what he thinks, how he feels, what his plans are. I did what I had to in life in order to survive, and here I am. Do I wish things were different? Yes! Can I change things? No! And I wouldn't change it. I'll do what I can do to help stop this guy, what I can't do is keep arguing with you right now while a good friend is in dangerous and his other half stays here wondering if he will see his friend alive again!

Oliver turned around and left the room, needing to get some air. Felicity started to follow him, but Kara gave her a sign to let him go. She said she would talk to him while she helped others with the rest of their huge problems.

Oliver knew Felicity did not mean to hurt him, but she was harsh with him. Still, it was a bit hurtful that she thought if that guy was anything like him, he was dangerous. He was aware of his personality, of his moods, of his lack of patient, that most of the times he was brutal. But all of that was necessary; it was his ways of getting things done. Dark Arrow was dangerous because he had all of his skills in fighting and was a Nazi.

- Hey. - Kara said as she approached Oliver's side.

- I'm sorry, I... - Oliver said as he scratched his forehead.

- Don't be... I get it. – Kara said as he stopped walking and looked at Oliver

- I know I'm not a saint. I've done horrible things.

- Oliver, I don't think Felicity meant what you think she did. I'm sorry if I'm crossing any lines here, but... You are a great fighter; you have amazing abilities, I've seen it. You have a though way of dealing with things as I've seen it, but this isn't a bad thing. I would choose a calmer and nicer way of dealing with people, for sure – she joked, adjusting her fake glasses and making him laugh – But I guess the thing is... What an evil version of you could do with all of your abilities and knowledge?

- Don't... Kara... I appreciate this, but. I know what she meant. Don't worry; I'm not angry at Felicity. She's been helping me from the start...

- And there is a story there. - Kara lowered her head as she said it out loud. It wasn't supposed to come out like it did.

She didn't want to seem jealous; she had no reason for it. But she couldn't help noticing the way Felicity reacted and the way they argued. It brought her many memories of her own moments of tension with her ex. Oliver looked at her surprised with her affirmation. He could tell she was really good in reading people and situations.

- A long one. But it's over. – He made a pause, looking at Kara. - I'm not angry at Felicity. I'm just surprised. I understand where her comment comes from. Like I said, I know I am no saint, my past always comes back to haunt me, this time it came in a form of an evil doppelganger from another Earth.

- You are not him!

- I need to do this, Kara. I need you to trust me. I have my reasons. Now we need to go back to your Earth so I can grab some kryptonite to deal with Overgirl once and for all.

Kara looked at Oliver and nodded with her head as they went back to the others. Cisco had the lead syringe ready and gave it to Oliver. He gave it to Kara that looked at it intensely, trying to use her x ray vision.

- Yep, it will work – She smiled as she gave it back to Oliver.

- Amazing. We can go now!

- Wait, I want to go with you! – Thea said as she stood up. – You might need help there, I can do it!

- Speedy, I don't know... It might be dangerous.

- My only brother is going to another universe to deal with lunatics that hates aliens and must be evil as hell. He is going to steal something that can take down Supergirl, so yes, I'm coming! – She said as she walked slowly towards him as she spoke.

- I want to go too! – Reneé said

- No way! – Thea said as she looked quickly at him - You stay here!

Alex walked towards Kara and gave her a hug, asking her to be careful.

- Are you sure you don't want me there as well? – Alex said as she looked at Kara, unsure if she wanted to stay in Earth 1.

- They need you here while Oliver, Thea and I are gone. No one knows more about me than you, every bit of information might help us defeat Overgirl.

- Ok, ok. Be safe! – She hugged Kara one more time and let her go.

Reneé looked mad at Thea and he was about to ask why he couldn't go with them, when Kara took her device from her pocket and opened a breach to her Earth.