Season 2...

"What the hell is he doing here?" Addison asked while Barry was distracted. She walked into the Core to see Harrison Wells and marched forward, slamming her fist into his face. He crashed to the ground without a fight.

Barry turned, "Addy, that isn't that Wells," he shook his head, "He's from Earth-2."

Addison shrugged her shoulders, "Sorry," she offered her hand to Wells 2.0, helping him back to his feet. "How do you know he's so trustworthy?"

Cisco nodded in agreement, "I second that. Just because he isn't our Wells that doesn't mean he is a good guy."

Barry sighed, "He saved my life last night. He knows Zoom and I think his help outweighs the risks," he looked at Addison, "Help me out, sis."

Addison looked at the man again, taking in all the Wellsiness of him, "I'll give him a chance. But, one wrong move and I'll make sure he doesn't get back up from my punch," she warned. She looked at him, the mark on his face bruising already, "Come with me and I'll get you some ice for that."

Harry rolled his eyes but nodded, as he followed her, but was stopped by a comment from Cisco, "We've been doing just fine without him. That's all I'm saying. We're batting a thousand against these breachers."

"A thousand, Crisco?" Harry replied, his tone arrogant, "What's your sample size, ten?"

Addison grabbed his arm to pull him with her, "Let's not make you enemies on your first day," she suggested, guiding him to the kitchen where she could get some ice for his face.

He sat down once they reached their destination while Addy made an ice pack before bringing to him, holding it gently against his face.

"I am sorry about that," Addy began, "I have super strength so I was probably the last one who needed to punch you," she revealed.

He waved off her concern, "I've been punched before, it won't be the last."

"We are probably going to call you Harry," she replied, "You know, to differentiate you from Harrison Wells version one."

Harry almost cracked a smile at her comment, "Whatever you need to do to help me take care of Zoom once and for all. Has he shown himself to your team yet?"

Addy shook her head, "No, we've only seen his agents sent to take care of Barry before he has to. Luckily, my brother has a great team so we can keep him safe. Though, your knowledge and experience will certainly help," she offered her hand, "Do you accept my truce? I promise to see you as Harry and not the evil monster from our past."

Harry's lips did curve into a smile that time as he took her hand in his own, "I accept. Now, can we get started on taking down Zoom?"

Addy nodded, standing to lead him back to the Core and get started.