Previously on Supernatural...
Without needing to think about it, he remembered...Dark had full control. But then Dark was gone and Mark was himself again. Then the angel, Castiel, was there driving a blade into Mark...
"It was Dark's plan all along. To have me trapped here."
...the only information they had on Darkiplier were the files Sam had gotten from the computer of Dr. Laurie Bates, whose dream was to rule by Dark's side. She had gotten killed by him instead...
That meeting with Dark didn't make sense sometimes. Why had he gone through so much trouble to get Mark then do so much to get Amy to decide to save him?
"This plane of existence is connected to the Multiverse. Meaning every path you could have or will take can be seen from here, by me. It was how Dark was able to travel between alternate universes."
Amy had been living day by day, watching Dark live as Mark. For nearly a year.
Dark was back. Sam looked at Dean. Neither of them liked the fact that Sam's hunch had been right.
What your mind can do...
Mark focused his thoughts...he could feel power surging through him.
"And it turns out...Dark took control of his original body when the angel came up..." Mark mimed stabbing himself.
Cas hadn't needed an innocent murder on his shoulders on top of everything else he had dealt with before Lucifer killed him.
Mark had felt that power and it had obviously scared him. But Dean could tell that that tasted hadn't been enough...
"You have this desire for revenge...but there's an endless supply of alternate universes, alternate Marks. You might wipe out a few of them, but you've already lost. Mark will keep going no matter what you've done or will do."
Then he remembered that power surge... It had only lasted a brief moment, but it felt... I want to feel that again...
"In another time, another world...Mark was led astray by the dark forces surrounding this house...The house wouldn't let him go until he fulfilled that lust for revenge. But things got out of hand. He stole someone else's body and ran. Dark is after him. Dark believes that Mark found his way into another world. Dark thinks you are him."
"Once he's here, I can trap him...So I can save him."
"You've spent close to a year with this young lady. True, it was all a ruse...but this last year has changed you. Dark is fading, isn't he?"
Amy hadn't believed there was anything human left in Dark...but she had seen a glimpse of who he had once been...
Damien.
"He's not who you think he is."
"You haven't seen what he can do."
"You put him there. You gave him that power...He's not who you say he is!"
Amy didn't know what he did, but she was suddenly knocked off her feet by a force that sent Dark flying across the room...Mark's eyes weren't a solid black, but there was something dark inside him.
"She can't leave...She doesn't have a body back in the real world. She's been dead a while. She can only live here."
Dark heard a gunshot then pain lanced through his side...Celine...she had been the one to let the shot wound him. Letting him know what she was capable of?
Dark didn't have to look to know that Amy had almost moved to protect him... "I win again," Dark said...Before anyone could do anything, Dark opened a portal and escaped into another world...
"You should learn not to trust me." Celine was going after Dark.
"Just tell me you didn't love him."
"I don't. But something did happen."
Too much time had been spent apart. They would need each other to heal that rift.
"If anything weird happens, let us know."