Sam tapped on the keyboard of his computer and looked at the screen in dismay. Dean, sitting on his bed, brooding, his arms folded, saw Sam's worried look and asked, "What is it?"

"Something's wrong here," Sam said, his worried hazel eyes never leaving the screen.

Dean feigned a look of shock. "You think?" he ব্যক্ত sarcastically.

Sam shook his head. "No, I mean, something's really wrong."

His tone caught Dean's attention, made the hairs on his arms stand on end. "Like what?"

Sam took a deep breath and looked up at Dean. "Like, I've done a খুঁজুন on Samantha and Deanna Winchester, and they're real. They have the exact same history as ours: parents are John and Mary Winchester, Mary died in a house আগুন in 1983, both children attended Truman High School for one মাস when they were teenagers, and Samantha was studying pre-law at Stanford বিশ্ববিদ্যালয় in California when she dropped off the map."

Dean's head was spinning. "So, what, they're stealing our identities, tryng to turn into us?"

Sam looked grim. "If that's the case, they're doing a hell of a job."

Dean was getting scared. "What do আপনি mean?"

Sam looked back at the computer screen, raised his hand, let it drop back on the table, and shook his head. "I've looked through every database I can find, and we're not even listed. Anywhere. Under any alias."

"What?!"

"It's like we've never existed, but those girls always have."

"What the hell...?"

Sam just sat staring at the screen and shaking his head.

Dean felt anxious and restless, and he started pacing the room. "What kind of a creature would do that?"

Sam shrugged. "I don't know. But we can be sure of two things: they're not demons অথবা shapeshifters. আপনি did know there was a devil's trap under the rug, right?"

Dean smiled smugly. "Of course I did. That's why I made sure to walk into it. Did আপনি notice that the pen Sammy-girl gave আপনি was plated with silver?"

Sam nodded.

"How'd আপনি know she had it, anyway?"

"Cuz I have one," Sam ব্যক্ত simply.

Dean looked curious. "Where'd আপনি get yours?"

Sam looked a little sheepish. "You remember when we first met Zachariah, about a বছর and a half ago?"

"Yeah?"

They were interrupted দ্বারা a knock at the door. Dean went to the door and looked through the peephole. Satisfied, he unlocked and opened the door.

Samantha stood outside, holding a পিজা box. Dean grinned. "The পিজা delivery girl."

"No, this is for me and Sam," Samantha said. "You can বিভক্ত করা with D for the other one, if আপনি get over there before she eats it all."

Dean was somewhat intrigued. "And আপনি and Sam...?"

"Got some প্রশ্ন to ask him," Samantha answered. "D's got some for you, too."

Dean smiled. "Fine. Come on in. Just let me get my jacket." Dean snatched his জ্যাকেট off the বিছানা and shrugged into it. As he passed Sam, he thumped his brother's shoulder and whispered, "Go for it, Sammy!"

Sam furrowed his brow. "What?"

"She's cute. Have fun! Anyway, I'm going to."

"Dean!" scolded Sam.

Dean smiled and winked at Samantha on his way out, closing the door behind him.

Sam groaned deep in his throat and looked up at Samantha apologetically, running a hand through his tousled, dark hair. "I'm sorry, about my brother-"

Samantha held up her hand and said, "Don't apologize. I already know what it's like. Hungry?"

Sam shook his head. "No, not really."

Samantha tossed the পিজা box on Dean's bed. "Me, either." She sat down on the edge of the বিছানা and looked at Sam, who still sat in the chair দ্বারা the table. The two of them just looked at each other for a moment, and Sam found his gaze travelling over Samantha's soft, golden hair.

"What is it?" asked Samantha, seeing the way he was looking at her.

Sam's cheeks reddened, and he stammered, "Ah, I... you... look so much like my mother." He smiled very slightly, and very nervously. "She was beautiful, too."

Samantha smiled back, feeling herself blushing a little. "Thanks. If your mother looked like my mother... well, yes, she was beautiful."

Sam glanced back at the computer screen, chewing on his lip, not even realizing that the screen had turned itself off because it had been idle for too long.

"So," Samantha said, breaking the silence, "I take it you've discovered the, uh... discrepancy দ্বারা now."

Sam laughed mirthlessly. "If that's what আপনি call finding out that I'm not real and আপনি are... yeah, I found it." He looked up at Samantha. "So now you're ready to stake and burn us, অথবা find and burn our অস্থি অথবা something, right?"

"Me, no," Samantha said. "D is, though, and I'm sure Dean is the same."

Sam nodded.

"So tell me something about yourself," Samantha said. "I know আপনি went to Stanford. Why'd আপনি leave?"

Sam glanced down at the floor sadly.

"A... Jessica?"

Sam looked up abruptly. "How did you-"

"I হারিয়ে গেছে my boyfriend in a আগুন in our apartment," Samantha confessed. "Jesse Lee Moore."

Sam shook his head. "Everything's the same. Only the genders are backwards. And not even that. I mean, you're parents weren't Mark and Joan, অথবা anything like that."

"Only a few minor changes to make your lives essentially the same as ours," Samantha mused. "I just don't get it."

Sam looked pensive. "I have a theory, but it's pretty wild."

Samantha spread her hands invitingly. "Shoot."

"How much do আপনি know about parallel worlds?"

Samantha raised her eyebrows.