Despite seeing it all before, Nick couldn't help but be taken aback when he stepped inside the Men of Letters' bunker. Somehow, seeing it when he wasn't worried about a knocked out, deadweight demon waking up at any moment and attempting to kill them all made him a little more relaxed and actually able to take everything in.

"Hello?" Nick called out once he was halfway down the stairs.

"You made it!" Sam's voice echoed and Nick looked down to see him smiling up at him. He quickly made his way down the stairs in time to see Dean walk into the room.

"Hey, Nick!" Dean smiled, clapping him on the back.

"It's good to see you too," Nick smiled back.

"Just you?" Dean asked, looking over Nick's shoulder to see that no one stood behind him.

"Yeah, just me. Trubel's off kind of doing her own thing now, and I didn't really want to get anyone else involved," Nick smiled a little sadly. Sam nodded but decided not to say anything; he was happy she had finally been able to do want she had been wanting to.

"Well, it's good to have you here anyway. And not just because this case is way above our pay grades," Dean laughed, and Nick rolled his eyes.

"So, what's the deal with this case anyway? You guys going to give me any more details other than a few gruesome pictures? Thanks for those, by the way," Nick asked, trying to not remember the moment he first saw the pictures.

"The morgue where the body is being kept isn't too far from here. We'll explain everything on the way," Dean grabbed the keys for the Impala and the three of them piled into the car. As they drove, Sam explained about the 'animal attack' and that neither of them had ever seen anything like it before. Soon enough, they pulled up to the morgue.

"Okay, so you're going to have to pose as an FBI agent too, obviously" Dean casually said to Nick as they walked inside.

"What? No way! I'm an actual police detective," Nick scoffed in shock.

"Yeah, a police detective on the other side of the country. They would be way more suspicious if you say who you really are," Dean pointed out. But before Nick could answer back, they had reached the front desk.

"Hello boys, back again so soon?" the receptionist smiled, "And who's this?" she raised an eyebrow as she looked towards Nick.

"Oh, I'm-" Nick stated but Dean cut him off.

"Agent in training," Dean said a little too quickly. The receptionist paused for a moment, a frown forming on her face.

"Alright then, head on through," the receptionist finally said, and Sam thanked her before ushering them all through. Once they were out of earshot, Nick turned towards Dean.

"Agent in training, really?" he sighed, and Dean shrugged.

"She bought it," Dean smirked slightly.

"Barely. Please try to remember that, unlike you two, I actually am employed by a real police force. I could lose my job over something like that," Nick shook his head in despair. Much to Sam's relief, before this could continue any further, they had reached the right room. As soon as Dean pulled out the body, Nick instantly knew it was Wesen.

"That's the work of a Hundjäger," Nick stated matter-of-factly.

"A what now?" Dean asked, still a little overwhelmed by Grimms and Wesen and that entire world, really.

"A Hundjäger," Nick repeated "they're kind of dog-like, different to Blutbaden though,"

"Okay, do you have any idea why one would kill some random guy in the middle of the street?" Sam asked and Nick began to frown.

"Honestly, I've got no idea. They're quite often hired as assassin's, so maybe this guy had a price on his head? But, other than that, I don't-" Nick suddenly stopped and bent down, looking closer at the victim's hand.

"What is it?" both Sam and Dean asked, almostly at exactly the same time.

"The mark on his hand, it's Verrat," Nick mumbled, standing up straight.

"I thought you said it was a Hundjäger?" Dean asked, becoming more confused by the second.

"No, it is. The Verrat are an organisation. But why would…?" Nick mused, now also quite confused.

"At least we know it's Wesen now," Sam nodded.

"Yeah, we should probably head back to the bunker. I'll explain everything there," Nick said and the brother's agreed. They headed back to the Impala and began driving back.

"I still can't believe you tried to pass me off as an agent in training," Nick huffed a laugh at some point during the journey back.

"Hey! Like you had any better ideas. Plus, like I said, she believed us," Dean retorted.

"As if! She looked at you like you had gone mad,"

"Come on, don't-"

"Dean, stop the car," Sam suddenly said, looking at something out the window.

"What? Come on Sammy, we were just-"

"Just pull the car over," Sam repeated, not turning away from what he was looking at. Sensing his brother was serious, Dean quickly pulled over to the side of the road and stopped the car. Both Dean and Nick watched in silence as Sam cautiously stepped outside. They watched as Sam walked over to the edge of the road and disappeared into the tree line.

"Sam? Where are you going?" Dean called out after him, but he got no reply.

"What is-" Nick started but was quickly cut off.

"Dean!" Sam's voice suddenly called out. In the flash of a moment, Dean and Nick jumped out the car.

"Sammy!" Dean shouted, running towards the trees. Nick followed him but they both soon came to a stand-still; Sam was nowhere to be seen.

"Sammy! Where are you?" Dean shouted again, turning in a circle. But still no reply.

"Where is he?" Nick asked, unable to see any sign of anyone but himself and Dean.

"I don't know, but now we have to find him," Dean's face held a determined expression and Nick nodded in agreement. They had to find Sam.