The Winchester brothers finally reveal to Shawn and Gus why they are in Santa Barbara. They tell them about the Mark of Cain and what it could do to Lassiter. Will Shawn and Gus believe them and help Lassiter or will they ignore the brothers' warning?

Although he was hesitant, Dean explained the whereabouts of the situation.

"He has the Mark of Cain."

Shawn and Gus shared a confused glance before looking back at the brothers.

"Um, okay. What the hell is that?" Shawn asked, confused yet curious about this whole situation. Gus crossed his arms over his chest, raising an eyebrow in suspicion.

"It's a special mark that gives the bearer different powers like super strength and telekinesis," Dean explained.

"Well, that doesn't sound too bad. What's wrong with having it?" Shawn wondered, smirking at the thought of having cool powers. Besides being psychic, of course.

"If you would let me explain, you would know," Dean said, clearly frustrated. He took a deep breath before continuing.

"Not only does it grant the bearer powers, but it also slowly corrupts them. The person who has it will always want to kill something and if they give into that desire, the Mark starts taking control of them," Dean said. Gus' eyes widened and he looked at Shawn.

"That does sound a bit like Lassiter," Gus murmured. Shawn gave him a small nod, deep in thought.

"But wait, how do you know all this stuff about the Mark of Cain?" Gus questioned, turning to look at the two Winchesters again. Dean's eyes clouded over and he cleared his throat, shuffling his feet awkwardly.

"Because I had it before," Dean muttered, "and I'm not proud of some of the things I did."

Sam gave his older brother a sympathetic pat on the shoulder, signaling to him that everything was alright. Dean coughed and lifted his head again, putting on an emotionless expression.

Shawn pursed his lips, understanding things a little bit better now. All this talk of the supernatural actually being real was still hard to wrap his head around. Gus seemed to be having trouble with it too.

"Wait, so what's your plan for Lassiter?" Gus questioned, rather scared by what their answer would be.

"Well, we were planning on just killing this Lassiter guy," Dean admitted. Shawn's jaw dropped in shock and Gus let out a small gasp.

"You can't kill Lassie! He's our friend!" Shawn exclaimed. "Well, sort of..."

"Hey, Lassiter was Cain in our world before we killed him and we don't really have any other options here," Dean told them.

"But there has to be another way to do this without taking Lassiter's life!" Gus cried. Sam thought for a moment before having an idea.

"Wait, there is one other way," Sam murmured. Shawn turned to him.

"What is it?" Shawn asked hopefully. They might not get along all the time but Lassie was a good guy and he wasn't going to watch him get killed.

"There's a special spell that can remove the Mark from the bearer," Sam explained. "It was used on Dean to remove the Mark from him."

Shawn let out a relieved sigh. There was still a chance for Lassie, after all. "Okay, so if we get Lassie alone and say the spell, the Mark will be removed, right?" he asked. Sam and Dean nodded.

"Yeah, that should do it," Dean sighed. "Well, I don't know about you guys but I'm tired. Maybe we could talk more tomorrow?"

Shawn and Gus nodded, noticing how Sam let out a yawn. The two brothers hopped in the Impala and Dean started the engine.

"Okay, where should we meet tomorrow?" Sam wondered, leaning over toward his brother's open window.

"Meet us in our office. It's called Psych and it's right on the beach front. You'll know it when you see it," Gus told them.

"Yeah, because it has Psych in big green letters on the front window," Shawn smirked. Gus frowned and nodded.

"You'll see it," Gus assured them. Dean gave him a curt nod before speeding away to find a motel to crash in. Shawn and Gus watched them go.

"Wow. I can't believe that just happened," Gus murmured. Shawn sighed, feeling overwhelmed by the situation before them.

"Yeah, me too," he muttered. Pulling out his phone, Shawn dialed a number before holding the device to his ear. Juliet's voice answered after two rings.

"Hey Shawn. What's up?" she asked politely. Shawn let out another sigh and rubbed his forehead.

"Look Juliet, something's come up and I need you to promise me that you won't tell anybody. Not even the Chief and especially not Lassie," Shawn said.

"Yeah sure. What is it?" Juliet sounded worried and Shawn immediately began telling her about the conversation that him and Gus had had with the Winchester brothers. He told her about the supernatural being real and about how Lassie had the Mark of Cain. Juliet listened the whole time, absorbing every word.

"Shawn, is this some sort of joke?" she questioned skeptically. "Because it's not funny."

"No Juliet! You have to believe me! This is all true; everything I just told you is true!" Shawn exclaimed. He heard Juliet sigh through the phone.

"Alright, I believe you. But what do I do about Carlton?"

"Just keep an eye on him and make sure he doesn't hurt anybody."

"Okay, I can do that," Juliet replied. "But Shawn, be careful."

Shawn smiled and chuckled softly. "I will, Jules. Bye." He hung up the phone, letting out a deep breath. At least he had his best friends to help him face this situation. Lassie needed his help and he was going to do his best to help him.