What if it took place pre-series?
Sixteen year old Sam sat in the back seat of the car sulking. They were moving again. He only had a little over a year left of school. Why couldn't they just stay in one place for once?
"What do you guys want for lunch?" his dad asked from the front seat.
"Double bacon cheeseburger," Sam's older brother Dean answered promptly.
Sam rolled his eyes. Big surprise there. It's what he wanted for lunch every day. "Whatever," he said. He didn't care. A year and a half and he was done with hunting and moving around and diner or fast food every day.
John stole a look in the rearview mirror at his younger son. He knew he hated all this moving around, but at least this time he was just sulking instead of yelling and arguing about it. Luckily somewhere along the way he had learned the futility of all that.
John pulled into a drive-thru and ordered three bacon cheeseburgers and fries. They might as well all eat the Dean Special today. He then turned around and headed back to a rest stop he had seen about an hour ago. It was a nice day and it would be nice to be outside instead of cooped up in the car or a fast food place.
SSS
They had mostly eaten in silence. Sam was being sulky Sam. Dean hadn't been like that when he was 16 and John was getting sick of Sam's attitude. However, at the moment he wasn't doing anything specific to get yelled at about and John figured he would just enjoy the quiet before the storm.
Dean was worried. Sam hated hunting. He only had just over a year until he turned 18. If something didn't change soon, he wasn't going to stick around. His father would never imagine that happening. He thought Sam would shape up and fall into line, but Dean wasn't so sure. He was silently observing both of them over the burger and it amazed him how alike they were and they just couldn't see it. They were both so stubborn.
"I gotta go to the bathroom," he said and got up to go use the bathroom. He was pretty sure it was disgusting, but he had to go.
Sam and John stared at each other momentarily across the table. Sam squirmed a little under the scrutiny. But, he was distracted from that when a man sat down next to him.
"My other son is sitting there. There are a couple of other tables here, both empty," John said, pointedly. He didn't like some stranger just sitting next to Sam like that. What was odder was that he hadn't even seen him walk up.
"But, I want to sit here," he said in a British accent.
"Well, we were just leaving anyway," John said. They were done eating. They would wait for Dean in the car. John stood up and signaled to Sam to do likewise. Sam started to but the man grabbed his wrist and it started burning.
"Aargh," he cried out and sat back down. He looked down at and his wrist was all red. It looked like fire.
"What are you?" John yelled.
Dean came running out of the bathroom. He thought he had heard Sam scream.
"Everybody is going to sit down and be calm," the man said.
Sam was trying to breathe through the pain. He suddenly felt a bracelet slapped around his wrist, but the pain was gone.
"What is this?" he asked.
"That's your leash. I'm not talking to you. I'm talking to your father, who, for some reason is still standing."
John wanted to attack this thing in front of him, but he wasn't sure what it was. Sam closed his eyes and put his head back in pain again.
"If you want it to stop, both of you sit down on the other side of the table and we will discuss this."
"Sit down, Dean," John said as he sat. Once they were both seated, Sam noticed the pain went away immediately.
"My name is Crowley and I need your help with something. As you saw, I placed a device on Sam's wrist. This allows me to give him incredible pain with just one thought. "
"What do you want?" John asked.
"I'm collecting creatures. Werewolves, skinwalkers, vampires, rugarus, you get the idea."
"Why?" Dean asked.
Sam gave a little whimper.
"I told you, I'm talking to your father."
"Sorry," Dean said, but he had murder in his eyes.
"So, you want us to catch creatures for you?" John asked.
"That's right. Big bad hunters that you are, you shouldn't have any trouble." Crowley got up to leave.
"Wait, how do we contact you when we have one."
"I want at least one creature a week. As soon as you have something, I'll come get it from you. "
"How will you know?" Dean asked.
Sam grunted in pain this time. He also glared at Dean. He knew it wasn't really his fault, but just wished he would learn to shut up once in a awhile.
"I neglected to mention that Sam's little gift has a bug on it. I will hear everything you say. So, don't try to double cross me. Don't try to remove it, or Sam will blow up immediately. And I want both of you with him at all times, so I know you're not off plotting somewhere."
"What are you?" John asked.
"If you must know, I'm a demon," Crowley admitted. Then he disappeared as fast as he had appeared.