The sound of the bunker door opening draws both brother's attention away from the books they are currently scouring. Both share looks of surprise and confusion as the dark-haired girl rushes into the library.
"Seriously?" Lexi questions them both, throwing her arms out in exasperation, "I tried calling both of you and it said the numbers were no longer in service. I have a serious problem, what do you guys know about doppelgangers?"
Neither man responds for a moment, still glancing at each other awkwardly in confusion.
"And you are?" Dean questions calmly.
"I'm awesome," she replies with a smirk, then points a finger in Sam's direction and cocks her head sideways, "Did you do something different to your hair?"
"Seriously, who are you?" Sam questions, raising a curious eyebrow.
"And how did you get in?" his brother adds, "That door was locked."
"I have a key," Lexi places her hands on her hips and looks at them in confusion, "Are you guys okay?"
"I'm going to ask you again," Dean says slowly as he stands up from the table, "Who are you?"
As he stands up Lexi notices his sleeves are rolled up to his elbows and on the inside of his right forearm, she sees what appears to be a scar. She instinctively reaches over and grabs his arm and twists it so she can get a better view of it. Lexi's eyes go wide in realization, she would know that symbol anywhere because of the research Charlie was doing before she died. It's the Mark of Cain.
"I'm…I'm Lexi," she fumbles with the words, her face going pale, "but you haven't met me yet."
She can feel her heartbeat quicken and she tries to slow her breathing as she lowers herself into a chair at the table.
"Haven't met you yet?" Sam questions, "As in, from the future?"
Lexi just nods her head as a million thoughts run through her mind. The doppelganger she saw this morning wasn't a doppelganger at all, it had to have been herself from this timeline. That would also mean Charlie's still alive, and she just barged in on the Winchesters and they have no idea who she is. What kind of Butterfly Effect does this cause?
"Wait," Dean tries to wrap his mind around things, "you're from the future, and you know us?"
She nods again, not looking up from the blank stare she has fixated on the table in front of her.
"And I don't have this mark in the future?" he questions again and points to the mark on his arm.
Lexi looks over at the bright red scar on his arm for a moment and shakes her head at him.
Dean's face breaks into a wide smile at that information as he looks across the table at his brother who in turn questions Lexi more, "How far in the future are you from?"
"Just a few years," she's trying to pull her thoughts together, "but you'll be rid of that thing within in a few months."
"What happened?" Sam questions, curiously changing the subject, "How did you get here?"
"I don't know," she replies, "I woke up in a motel room, I don't really remember what happened last night, and I don't have my cell phone. I borrowed some soccer mom's phone tried calling both of you, but it said the numbers were no longer in service. Then I saw what I thought was my doppelganger, but now I realize it was just myself from this timeline, so soccer mom offered me a ride and I had her drop me here."
"You're a hunter?" Dean questions sitting down on the edge of the table.
"No shit sherlock," she quips, then holds a hand up in defense, "sorry, still processing."
"Were you working on case?" Sam questions trying to be helpful.
"No, I was actually kind of on hiatus from hunting at the moment."
"What does a hunter do on hiatus?" Dean looks thoroughly intrigued.
"Bartend," she looks at him as if the answer was as simple as two plus two and he nods his head in agreement.
She covers her face with her hands and takes a couple deep breaths and then looks back across the table at Sam, "How do I get back?"
"We'll figure it out," he responds reassuringly.
"I'll call Cas," Dean says as he stands up, "See if he has any ideas."