Chuck woke up in a cold sweat, his clothes were sticking to him, his head was spinning. He'd passed out at some point last night, what time, he wasn't sure, he couldn't even remember making his way over to the sofa, but that was where he was awakened - with the sound of screaming still ringing in his ears.

This was one of the few times he couldn't make sense of what he'd seen, where the pieces didn't fit together as easily as they should have. He glanced around the room, his wide eyes blood shot, his chest heaving, still recovering from the images that had been flashing across his mind. He wasn't even sure what exactly what they had been, or why they had been so rushed and unclear, but he knew that they were about one thing and one thing only.

The apocalypse.

He stumbled across the living room, his hands reaching out for something, anything, and the moment his hands slipped over the paper he knew he had found it. It wasn't like the usual dreams, not one bit, it was fleeting, and he was struggling to hold onto the details. The faces, the places, what the hell had he seen. And so he wrote, he grabbed the nearest pen and he pressed it down hard on the paper and wrote. The words didn't even make sense, they were mere snippets of information that he had managed to drag out of the mess.

He could feel his dissociation ebbing away, the world steadying, the ground no longer tilting at a sickening angle. As the information left his head his heart calmed down, his breathing slowed, and by the end his hand had a cramp but he no longer felt like he'd been hit by a truck.

He cleared his throat, glancing down at the notepad, and scowled. It didn't make any sense, not a single word of it. Some of it was in latin, or some other language that he didn't understand, and the rest was just a pile of words, names, with a single one scrawled in the center, the paper torn from where he had jabbed the pen in with emphasis. 'Eve.' It said, as if that was explanation enough.

It was dark, and when Dean pried his eyes open he couldn't quite figure out why he had woken. He was exhausted, mentally and physically, and he knew that he needed his sleep. But something had woken him. He frowned as he rolled onto his back, staring at the ceiling, feeling his hand sneak underneath his pillow to find the gun that he hid there every night without fail.

"You won't need that." The voice was deep, and monotonous, and Dean knew straight away that it was Castiel. He let out an exasperated groan and pushed himself upright, seeing the shadowy figure of the angel standing at the bottom of the bed.

"Cas, it's a little late...early..." Dean rubbed his eyes because he couldn't follow his own train of thought.

"You need to come with me." Castiel told him.

"What about Sam?"

"Him too." Dean glanced over to the twin bed just a few feet away from him, his brother face down, asleep, not having been disturbed by Castiel's rather rude visit. Dean scowled.

"Can't it wait till morning?" He asked. Castiel stared blankly at him.

"No. It cannot."

"What's the big deal?" Dean groaned.

"The seal-"

"Another freaking seal?"

"It's not just any seal. It's the last seal, the sixty sixth seal, the final seal, the one that Lillith has to break in order to open Lucifer's cage."

"She's on the final seal?"

"Not exactly. We can get to it before she can." Dean raised his eyebrows.

"Well that's good news." He muttered. "Where is it?" Castiel's face faltered.

"I do not know." He admitted. Dean nodded sharply.

"That's just great."

"I know someone who does."

"Care to elaborate?" Dean's impatience was not being made any better by his lack of sleep.

"The prophet Chuck. He's had a vision. He knows where the seal is." Dean rolled his eyes.

"Why is this such a big deal? I mean what is this seal exactly?"

"A girl." Dean had not been expecting that. He heard Sam stir from beside him, the conversation beginning to unsettle him from his sleep.

"The final seal is some chick?"

"Eve." Castiel said the name as if it had some sort of significance. Dean frowned, not following.

"Like... Adam and Eve?"

"Don't be stupid." Castiel said bluntly.

"Then who is she?"

"God's perfect creation. She is innocence, how humanity was intended to be."

"And what, she eats an apple and Lucifer is out of the box?" Castiel frowned.

"No, this has nothing to do with fruit. To break the seal she must be corrupted. Once her innocence is lost Lucifer will be free."

"So... we have to stop her from getting laid?" Dean wasn't following, it was a lot of information to process at 4 in the morning.

"Innocence is not connected to procreation. She is without evil, without malice. The moment a malicious thought enters her head she will be corrupted and the final seal will be broken."

"Dude, that could happen at any second."

"That's why we need to go now."

"And what exactly are we supposed to do?" Dean didn't understand.

"Kill her." Castiel said, as if it was the most obvious answer possible. Dean's eyes widened.

"We're killing some completely innocent girl?" Castiel nodded.

"Yes."

"Why? Why not just kill Lillith?"

"Because if Lillith succeeds in breaking all the other 65 seals, we will not have this chance again."

"I'm not alright with killing some... girl!" Dean growled.

"She is not some girl." Castiel told him bluntly, "She is the antichrist."