When Olivia crossed over to the Other Side, she didn't know what to expect. She always arrived in a different place, but usually in a place she had been before.

She never expected that place to be in her bedroom. Well, not her bedroom, her alternate's. It was exactly as she remembered it, except some things that must have belonged to Frank were gone. She felt very uncomfortable. Her memories of living here and living another's life were not real anymore. And even though she understood that this Olivia Dunham had never fooled Peter, never tricked him and never had a relationship with him in her place, Olivia still felt a hostility towards her because she remembered. She remembered something that didn't happen. And it made her want to get this over with as soon as possible.

No one was home at the moment, but Olivia knew that she had to work fast. She was out the front door and on the street in moments. She couldn't hail a cab and didn't have a car, so she would have to walk to her destination. As she pulled on her hood and shoved her hands into her pockets, she bumped in to someone.

"I'm sorry" they said simultaneously. When she looked up, she saw herself, the face framed with bright red hair.

"What are you doing here?" Liv asked, looking confused, suspicious, and a lot of other things.

Olivia sighed. She had been hoping to avoid this confrontation, but of course it wouldn't be that easy. "I'm looking for someone."

"Huh. And you couldn't find them on your side?" Her hands were on her hips and her tone was borderline rude.

"On my side, they're dead." Olivia looked down at the ground, avoiding eye contact. Liv's arms slid down and her posture relaxed.

"Who?"

"Elizabeth Bishop."

Liv's body tensed up again. "What business do you have with the Secretary's wife?" Olivia saw her arm twitch, as if trying to reach for the cuff on her ear.

"I have a message for her from Peter Bishop. I have the ability to cross over on my own, so..."

Her hands moved back to her hips. "So you came on your own instead of going through the normal channels. Must be some message."

"Well, I was afraid the Secretary wouldn't let me see her so I thought I would track her down myself." Olivia could tell her own tone was more hostile than before, and she mentally caught herself. She attempted to relax a little, knowing her doppelgänger wouldn't understand. "You wouldn't happen to have a car I could borrow, would you?"

Liv could tell that something was wrong with her counterpart, so she felt uneasy letting her go alone in an unfamiliar universe, even if she didn't particularly like this Olivia Dunham. She was too serious, too uptight. Too different.

"I don't really want you driving my car. You might wreck it," she said in a forced but still playful voice. "I'll drive."

Olivia sighed in defeat. "Now that you know I'm here you're not gonna let me go, are you?"

Liv gave her a half smile. "It would be irresponsible of me to let you wander around the universe unattended. Especially since you didn't get over here through legal channels." She turned away, and started walking.

Olivia took a deep breath and started after her.

When they reached Liv's black SUV, they climbed in and got on the road. "Did you even know where you were going?" Liv asked.

Olivia shot her a look as if to tell her to watch what she was saying. "It's not as if I don't know my way around here."

Liv recoiled a little bit, surprised by Olivia's rudeness. "Okay, but what I meant was that you've never been to the Secretary's before. I've only been there once. How did you know where it is?"

Olivia sat back in her seat and glanced out the window in to the night sky. "Long story." She really didn't want to talk about it anymore, let alone trying to explain how she has memories that technically didn't happen and that they are what's causing her attitude to betray her poker face.

"Well, I'm a decent listener. I can listen to Lincoln ramble on and on about-"

"I'm sorry, but I just don't think you would understand," Olivia cut her off. She suddenly realized how strongly she felt against his woman and how confused she would be. "Sorry."

"No, no. Don't apologize. You said yourself I wouldn't understand, and I can assure you I am thoroughly misunderstanding your problem right now." Her voice was hurt, but mostly just angry.

They became silent. After a few uncomfortable minutes, Liv sighed.

"Look, I know we don't exactly enjoy each other's company, but I am making an effort to play nice. And you, you're just... Well, I don't know what I did to you but I'm sure I don't deserve this." She settled in her seat and turned back to the dimly lit road in front of them.

Olivia took a second more to gather her thoughts. "I've been developing memories from a different version of me," she said shakily.

"What, like a third universe?" Liv scoffed, teasing.

"No, more a different...timeline. Still me, just different events throughout my life."

"Okay... But what does that have to do with me?"

Olivia sighed, not knowing how to continue. "Well, in that timeline, Peter Bishop was a part of our team. And when he found out that he was from this side, that our Walter had taken him, he left. And your Walter, the Secretary, came and got him, bringing him here. So we came to get him."

"Were you two a thing?" she asked, curious.

"We were, um, I don't know what we were. But when I came over here to get him, I realized that I wanted something more, and he did, too. So we were going home together, to my side. But in the process of going back..." her voice cracked and she questioned continuing.

Liv waited patiently for her to continue the story.

"In the process of going back, you-the other version of you-and I...switched. And when you returned home, Peter thought you were me and that we were together. And you continued a relationship with him as a cover, while gathering intel from the our side. The Secretary wanted him to activate the machine so he could destroy our universe." Her last sentences were pushed through her teeth, as if trying to keep her voice down. Like she was trying to keep it from being an accusation.

Liv didn't speak. Olivia stopped talking as well. She stared at her red-haired duplicate, waiting for any response at all.

Then Liv broke out laughing. Olivia was caught so off guard that she couldn't make words come out.

"Peter Bishop?" Liv managed out between sidesplitting laughter, trying not to swerve on the road.

Olivia was in shock. Did this woman think she was lying, that she was spinning some fairy tale just for the hell of it? "Yes, Peter! Why?"

"He's just so not my type!" Liv laughed.

"I hardly think that mattered to you at the time!" Olivia shot back.

Liv stopped laughing and focused on the road. "Is that why you hate me? I stole your man?" she asked in a sarcastic tone.

Olivia sighed. "You tricked him, while I was stuck over here forced to live a life that wasn't my own. I think I have the right to be a little defensive."

"Well, how do you know all this, anyway? How is it from another timeline? And how do you remember it all?"

"When Peter got in the machine and created the bridge-"

"Wait, wait. Peter created the bridge?"

"Yes, with the machine. He knew that one universe could not survive without the other, so he built the bridge so we could work together to heal the two worlds. But after the bridge was created, he disappeared. Not just gone, but he was erased from existence or something. I don't know how he was erased, and I don't know how he got back, but the timeline was rewritten. In this timeline, he died as a boy just after being pulled from this side, his original side. So when he returned, no one knew who he was or how he knew all this information about us and our Fringe Division and even this side. "

Liv sighed. "But it still doesn't explain how you have those memories."

"And that we don't even quite understand ourselves. But my memories from this timeline are fading as the other memories get stronger." Olivia paused to catch her breath. "The only benefit is that Peter and I have memories of the same timeline."

"So you are together, now? Is that why you are going to see Mrs. Bishop?"

Olivia looked out her window again. "I suppose, yes. I'm going to see her as a favor to him. He wanted to thank her and I have a convenient way to get over here."

Liv sighed as they pulled in to a long driveway. She turned the ignition off. "Well, here we are. Think she'll freak if we go to the door together?" Liv asked with a playful smile.