Dean curled his lip. Someone was tailgating him, even though he was going about 20 miles faster than the speed limit. What the hell was this guy's problem? Dean sped up, just to see what the guy would do.

"Dean, you're going well over the speed limit as it is, just let the guy pass you."

"Hell no, Sam! He wants a race, he's got one!"

"DEAN! I'M NOT DYING BECAUSE OF YOUR PRIDE!"

Dean grumbled and took his foot off the gas, letting his baby return to a more reasonable speed.

"Maybe he wants something?" Sam thought aloud as the guy behind them made a move to pass.

"Yeah, a race." Dean pouted.

Sam just rolled his eyes at his butt-hurt brother.

The car pulled up to the left of the Impala, and Dean finally got a look at the driver.

"Cas!?" Sam shouted, while Dean grumbled "What the hell?"

Castiel looked terrified, and was clearly having some difficulty controlling the most likely stolen car. Dean sighed, and motioned for the frantic angel to follow him.

Cas nodded, and proceeded to swerve dangerously close to the Impala to avoid a bird.. "Son of a bitch." Dean spat as he inched his baby to the right to avoid a collision.

"He really shouldn't be driving." Sam stated the obvious. Dean just scowled in agreement.

Cas slowed down and slid in behind the Impala, nearly causing another collision by not signaling. Dean sighed at this as Sam pinched the bridge of his nose.

"This had better be important, he almost wrecked my baby!"

Sam just raised his eyebrows and said, "Well, maybe you should get off the highway, Dean!"

"Yeah, yeah." Dean saw an opening, and, after quite a bit of maneuvering, pulled into a diner right beside a gas station. Cas skidded to a halt beside them, having to slam on the brakes to avoid smashing into Sam's side of the car.

Cas staggered out of his crappy car, and rushed over to the Impala, clearly bursting to talk to Dean. He shuffled impatiently as Dean got out of his baby, giving Cas an indignant look.

"Look, this had better be important, you-" Dean started, but Cas cut him off.

"It is Dean, we have to talk now!" Cas was starting to fidget nervously.

"Alright, alright. Calm down, man." Dean clapped Cas' shoulder, and started heading towards the diner, Sam following.

Once they had settled themselves in a booth near the bathrooms, Dean raised his eyebrows at Cas, inviting him to say his piece.

Cas leaned in, looking around for anybody who may be listening in. "I've been hearing about suspicious deaths around here, so I decided to investigate some of them." Cas paused to watch a man walk past their table and enter the bathroom.

Dean shifted and raised his eyebrows. "And?" he asked, rather impatiently.

"They were all hunters, Dean." Cas looked to Sam. "And I believe that demons are behind all of it. There's sulfur at most of the crime scenes I visited, and the manner of death is most easily described as demon activity."

The man that passed by earlier walked by again, returning to his seat near a window.

"How many demons do you think there are?" Sam asked, looking at Cas questioningly.

"Two or three, if not more."

"What makes you think that?" Dean inquired, looking somewhat surprised now, almost as if he was only just starting to take the angel seriously.

"Some victims show clear signs of torture, while other victims were quickly dispatched. It seems as though at least one demon possesses his victims, and looks around in their minds for information. Once he finds what he needs, he fatally wounds the vessel, then leaves to find a new body, or perhaps an old favorite he uses while tracking hunters." Castiel looked down for a moment, before sighing and looking back at Dean. "The torture victims seem to have either been burned on their limbs, repeatedly, or are covered in various lacerations that range in severity. They were clearly being pressed for information, then killed; whether or not they gave away anything remains to be seen."

Sam looked down for a moment, and Castiel watched him, waiting for him to speak his mind.

After looking back up, Sam shook his slightly and asked, "You said "two or three, if not more". Why "if not more"?"

"There have been thirteen deaths in the past week alone, and several more before that. Also, the styles of death differ greatly; I doubt only a couple of demons could do all of this in just one week." Castiel answered.

Sam and Dean looked at each other, eyebrows raised slightly.

Dean looked back at Cas and said, "We have work to do."