A/N: I love Caitlin/Killer Frost, and season five is supposed to reveal a lot more information about their backstory. This isn't backstory, but I thought it would be interesting to see how Frost would react to Cicada - a Frost more than willing to kill to get rid of the threat. Please, let me know if you like it.

"You ready?" Cisco asked.

"You don't have to do this," Barry reminded her.

Caitlin breathed out low. They'd been working on this for weeks, figuring out how to do it just for her. It wasn't right to back down now. "I know. I want to."

"Okay. Turning it on… now."

She felt something around her, in the sealed chamber they'd rigged to re-expose her to dark matter. It didn't hurt. It was just like when the particle accelerator exploded the first time, in that she knew something had happened, but only distantly. Something…

She stayed in the chamber until they opened the door, and then she walked out slowly.

"Well?" Barry asked.

"Well what?" Caitlin asked. She was a bit disoriented, if she was honest, though she didn't let it show.

"Is Elsa back?" Cisco asked.

"Oh. I… don't know."

Cisco ran the dark matter scanner over her again. "The dark matter is back inside you. A shot of adrenaline should let us know if it's enough to bring her back."

Caitlin walked to her desk and opened a drawer, where a shot of adrenaline still lay from weeks ago. "You're right," she said, picking it up. She swallowed nervously. "Here goes nothing."

She felt her pulse pick up as the adrenaline rushed through her, and then her awareness faded.

She opened her eyes and looked around.

"Yes," someone said. "Told you it would work."

"Welcome back, KF. Now we can get more bakin' soda!"

"Everything okay?" the only girl in the room asked. She seemed concerned.

Frost took a step backwards, assessing. Four people stood staring at her, the others all starting to mirror the girl's concern.

"I can't find anything on Cicada," another man said, walking in. He looked like the girl's father. He stopped and faced her, and then looked back at the others. "What's going on?"

"You know that thing we talked about doing, that you said we shouldn't?" the girl asked.

"Yeah."

"We did it anyway."

"Caitlin, say something," one of the men (this one with long dark hair) said. He'd been watching her the whole time. There was only one thought in her mind, though.

"Cicada?" she asked.

"Our latest crazy meta villain?" he said. "Do you not remember -?"

She started walking out of the room.

"Whoa, where are you going?"

She looked at him, wondering if he would try to stop her. "To find Cicada."

"You can't just go! You're not acting right!"

She turned and thrust her arms down, coating the floor in ice and trapping their feet. Then she ran.

"What the hell?" Cisco yelled after her. Barry phased through the ice and started freeing the others. "What was that about?"

"Something's not right," Iris said. "She didn't look like she recognized us."

"She recognized Cicada," Barry said grimly.

"Not this again," Joe said.

"If she goes to follow him, I swear," Cisco said, moving towards the door.

"She won't," Iris said. "What reason would she have?"

"I don't know," Cisco said, "but I'm sure as hell not losing her again." He jogged out of the lab, trying to think fast. It seemed like getting her powers back had affected her memory of them. That bugged him, but there was an even greater concern on his mind. If she didn't remember any of them, that proved that parts of her were being blocked, and with the return of her powers and Frost persona… would she even remember that she was Caitlin?

Cicada.

She knew that name. Something from her past…

She mulled it over as she ran from the people in the lab, exiting the building and slipping into the nearest store. She needed to think of a place to go, but before that, she had to remember Cicada. Why did that name make her slightly scared? Why was it so personal?

She was crouched behind a magazine rack, pretending to inspect the covers, when it dawned on her. Thomas Snow had told her about Cicada once, years ago. He'd said the madman wanted to kill people with powers, so she had to always be on guard. He'd also said Cicada was looking for scientists, to help him figure out how to identify those with powers at a moment's notice.

Shortly after, Thomas Snow had disappeared.

She was intimidated by Cicada, but it was rage that dominated as she stood, looking out the store windows for signs of pursuit. Cicada had something to do with her father's disappearance; she knew it. He was a ruthless killer, starting a new string of murders if he'd drawn attention to himself.

She couldn't wait to kill him.

Frost didn't know who the people in the lab were, but she had a feeling they would keep searching for her. She needed time to find Cicada, but she couldn't stay here longer than necessary. So after exiting the small store she'd hidden in she made her way to the train station, looking at destinations that weren't too far. She found a promising one and snuck aboard, since she didn't have an ID or money. It was safer that way anyway, in case those people tried tracking her movements.

She stepped onto the platform some time later and looked around. It would definitely be easy to get lost in the crowd here. She smiled to herself as she started walking in search of a computer. Star City would be a great place to avoid detection while she tracked Cicada down.