John froze, one hand still holding his beer to his mouth. Before he could process much more than … Sammy?, though, not-Jefferson launched across the diner table and knocked both of them to the floor. Other patrons turned from their lunches in shock to watch the two men punch and bite and kick. One of the waiters tried to pull the demon off of John, but was elbowed in the face and stepped back several paces with a dazed expression and a bloody nose. Now the demon had John in a strangling grip while the hunter reached blindly around for his journal, but the book that had all his exorcisms had been on the overturned table and now lay a few feet away on the floor. Suddenly, the demon's grip went slack and he slumped sideways, revealing a timid teenage boy standing behind him holding one of the diner chairs in the air. John took advantage of the moment to lunge for his book and find the page he was looking for. "Regna terrae, cantate Deo, psallite Domino," John read, and not-Jefferson froze like he was going to be sick. "Exorcizamus te, omnis immundus spiritus," he continued the exorcism, ignoring the shocked and confused stares of his fellow diners that hadn't run screaming from the place. He stopped, though, when the demon started yelling, "You can't stop it, Winchester! I'm not the only one! You can't stop all of us!"

John stepped closer to the demon, whom was now lying on the floor, having stopped convulsing now that the ritual was paused, grabbed his collar, and pulled him up so John was in his face, "What the hell are you talking about?"

The demon laughed – a much different laugh than Jefferson's easy chortle – and spat back a reply that sent a whole course of shivers down John's spine, "All your lives have been preparing him for this. Get ready, Winchester. There's a storm coming."

And with that, a plume of black smoke erupted from Jefferson's mouth, out to find another innocent to possess before John could send the bastard back where it came from. Jefferson's body didn't move. "Somebody call him an ambulance," John picked up the overturned table and threw some money on it, not really caring if it met the bill or not, and left. His mind was only on one thing.

Sammy.

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Back at the motel room, John was throwing things into bags as fast as he could. His clothes were almost all in a duffel bag; the guns were put nicely into their slots in his truck. When he had everything he needed loaded up, he looked around the room. All his work on the Constance Welch case was still tacked to the walls; John's first instinct was to take them all down and leave no trace of himself, but there was still a Woman in White to take care of, and he no longer had the time to do it.

Instead, he put up almost all of the protection charms he had with him and lined the room with salt. He would have to get Dean up here to handle the unfinished business. John dug out his book and turned to a new blank page, but stopped – he didn't know what or how much to write in case something got in that wasn't supposed to. He wasn't even sure what was happening yet! Settling for "Dean 35-111", in a circled, large print, John hid the journal in the U-bend of the pipe under the bathroom sink; his son would find it and know what to do. He'd call and leave instructions just to make sure.

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"Dean, I need you to get up here. Something big is starting to happen, and it's more important than Jericho. I need to try and figure out what's going on. It may… no, it definitely has something to do with Sam. Take care of Jericho, it's a Woman in White, then go to the next hunt. I can't have you too close to this right now, but be very careful, Dean. We're all in danger."

John snapped the phone shut on his son's voicemail. He hoped he was clear enough for Dean to understand but vague enough so that demons wouldn't catch up on the trail. He didn't even realize that he was driving down the same stretch of road that Constance Welch haunted, or that she was watching him as he turned left for the interstate.

AN: Praise everything in the universe for the Supernatural Wiki, holy crap! I'm not sure if this will come up again in the story, but in my headcannon, the demon that possessed Jefferson had a hand in Jessica's death. I'm actually not sure if anyone but Azazel can do that to a person, since that's how it sounded like for the first few seasons until Brody said he had a part in it in S5. So I figured if other demons were involved, they included not-Jefferson.

Now the problem is that from here until halfway through the season I don't have a whole lot to work with and it becomes all headcannon. It might take longer to post because of that, but I'll try to do some research and come up with a time-table or something so I can confirm what I can and make plans based on that.

Thanks to missingmikey for the encouragement!