Cas stood outside of Metatron's jail cell, watching the other angel closely. He didn't seem to be aware of Cas's presence, Cas didn't mind he didn't particularly want to be noticed in the first place. Cas had felt a twinge that he assumed was from the bond but he couldn't be sure and he really needed to find out. The only way to do that, as Dean was dead by all accounts, was to talk to Sam. Cas wasn't sure if he was ready to learn the truth or not.

But he needed to know and if he never found out it would kill him more than knowing (he hoped). Cas made his decision in that moment and left Heaven's Prison for what had been named Heaven's Back Door, for no one believed that the gates would never be opened.

Upon arriving in that park guarded by the two angels in child vessels, Cas walked to his car. The two angels watched him carefully. It was a little unnerving to be stared at so intently by a child, even when you knew the being inside was so much older. In fact, that was probably what was so unnerving about it (After all that was why Lilith chose a child vessel).

Cas settled into the drivers seat and gripped the wheel. Strangely, this mode of transport had become a comfort to him. Turning the key in the ignition, Cas pulled his seatbelt on and drove off. The radio hadn't been on when he and Gadreel had driven up not that long ago. Now Cas turned it on, flicked it to a classic rock station and turned the volume up.

Dean was still on his bed. His black eyes open. The blade gripped tightly in a white knuckled hand, still against his chest. "Crowley?" He said, his voice hoarse. "You have 10 seconds to explain to me what the hell you're doing in my room?"

"Well-" Crowley started. "Planning to go take a howl at the moon?" He finished with a vague gestured towards the door.

"One thing I don't understand Crowley, is that you seem to think you can control me," Dean said. "Why is that?"

This seemed to strike a chord with the other Demon. "I am your King!"

"No Crowley you are the King of Hell," Dean said, sitting up, blinking his eyes back to green and facing the King. "And I am a Demon created on Earth. The likes of me haven't been seen since Cain himself!"

"Well, yes," Crowley tried. Dean stopped him by pointing the First Blade at him.

"Leave," The younger Demon said. Silently, that is exactly what Crowley did, Dean got the distinct impression that he had caused the older Demon to need a change of underwear.

Dean sighed in relief and sank back into the pillows. He really didn't want to deal with this. Now he was a demon he could control the Mark and he didn't feel a need to stab every living thing within a 100 mile radius. Truth be told he felt more like himself than he had in a long while. Yet at the same time he felt completely different.

He felt more powerful. He felt stronger. He felt faster (if that was a thing you could feel whilst being completely still). And strangest of all, he felt more in control.

Dean stood up. He walked over to his wall of weapons and took down his own first blade (a small knife really only good for skinning rabbits) and put the FIrst Blade in it's place. He then placed the other knife on his bed side table and walked out of his room.

Sam was sat in the main room of the Bunker. A glass of whiskey in his hand and a demon summoning spell in front of him. Crowley seemed to be a no show.

Just as Sam was giving up, the aforementioned King of Hell appeared. "Moose," He said, nonchalantly placing his hands in his pockets. "I take it this is about that hot headed brother of yours?"

"Yes," Was Sam's simple answer. "Bring him back."

"Now you see, I can't do that Moose," Crowley said. "You can't bring back what's not dead."

"What do you mean not dead?" Sam yelled.

"Sammy, he means I ain't dead," Dean said, walking into the main room from the side corridor leading to the sleeping quarters.

Sam dropped his whiskey. "How?"

"Ask the low life there," Dean said, gesturing with a loose hand.

"Low life?" Crowley growled. "You can't call me a low life! What with you being on the same level as me now!"

"Dean, what does he mean?"

"Me?" Dean asked calmly. "On the same level as you? Someone's got delusions of grandeur."

"Delusions of grandeur?" Crowley said. "Hows about you step into this here Devil's Trap and see who's got the delusions of grandeur?"

Sam repeated himself. "Dean, what does he mean?"

Dean shot a side glance at Sam. "I know what would happen, Crowley. I ain't stupid. But you seem to be forgetting something her, my King, you are merely a Crossroads Demon who has declared himself King, whilst I am a freshly formed Knight of Hell."

If Sam still had hold of his Whiskey when Dean walked in, he definitely would have dropped it then. "What do you mean, you're a Knight of Hell, Dean?"

Finally Dean turned fully to face his brother, meeting his eyes for the first time. "I mean Sammy, that this power hungry low life didn't tell me that there was a catch to the Mark of Cain-"

"I seem to remember Cain himself trying to warn you about something but you, what was it?" Crowley paused. "Oh yeah, told him to skip the warning label."

"Stow the crap low life," Dean said. "Yeah so he didn't tell me that if I died whilst in possession of the Mark I would wake up with black eyes."

"Okay," Sam said, trying to process his brother being a Demon. They had hunted demons and the like since Sam was a 6 month old baby, and now his brother was one. This would take some getting used to. It didn't even cross Sam's mind that Dean may have the urge to kill him. He never even thought that his brother would be the next messed up evil mastermind planning to destroy the world. He just saw his brother, sure a different version of his brother, but still his brother. The boy he'd looked up to as a child and the man he still did today. "What do you plan to do Dean?"

"Plan to do?" Dean said. "What do I plan to do? Well I doubt you can kill me without having the Mark and you sure as hell ain't havin' it and you definitely aren't curing me. I don't want you dead Sammy."

Sam hadn't really thought of either of these, in fact he hadn't thought of anything. He had only learnt of his brother being a demon a few seconds ago. Sam was a little bewildered.

Cas was breaking every speed limit ever known to man. He needed to get to the Bunker that day. Luckily the park that was playing host to the door was only about 8 hours drive from the Bunker. Cas felt he could make that journey in half the time if he could get enough speed up. Using a few Angelic powers to dissuade the police from following him and to break all of the speed cameras. Cas made it to the Bunker within three hours, don't ask him how... he doesn't know either.

He just knows he did it. He stepped out of the car. He slammed the door shut. He took a deep breath. He stepped up to the door. He took another breath. He knocked.

At first there was no answer and then the door swung open of it's own accord. Cas was sure that it wasn't supposed to do that. He cautiously took a step inside and...

Nearly stepped right back out at what he saw. A dead man, the King of Hell and a hunter sat at a table... This seemed like a bad joke... "Hey Cas," Sam said.

Cas didn't reply. He was staring at the man he believed to be dead.

That was when he felt it. The bond had surged back to life.

And it was stronger than ever.

Cas watched Dean carefully. Something seemed different about him. But he just couldn't quite put his finger on it. (And no, he didn't notice he made a Merlin quote then...)

"Hey Cas."

"Hello Dean."

With their usual exchange came the realisation of what was different. Dean was a demon. It wasn't two hunters and a demon sat at that table. It was two demons and a hunter. But somehow, this didn't make a difference to Cas. It was still Dean, Sam and Crowley (his opinion of that particular Demon would probably never change...)

"Cas, I can explain-" Dean tried to say.

"You're alive," Cas stated. With that he walked up to Dean gripped his shoulder (the one that used to hold his mark) and pulled him forward into a hug.

At first Dean had stiffened, expecting a punch to the face or a smiting or something... not a hug though... He definitely wasn't expecting a hug. After a moment he relaxed into the angel, hugging him back. After a further moment, Dean pulled back slightly. "Cas, not that this isn't enjoyable, but why are you hugging me and not beating the crap out of me?"

"Why would I beat the crap out of you Dean?"

"Oh maybe because I just went all Anakin Skywalker?"

"I don't see what a fictional character who started using an evil form of magic for his universe has to do with this situation."

"Really Cas?" Dean said. "You get the reference now, but you don't know how it applies to this situation?" Cas just stared at Dean. "Dark side?"

"Oh I see," Cas said. "I don't see how you going dark side has anything to do with me hugging you."

"Maybe because you're an angel and I'm a demon and isn't this profoundly wrong somehow?"

"Actually that's where you're wrong Squirrel," Crowley interrupted the conversation between the angel and knight. "From what I gathered from the energies rolling of the pair of you in waves, you're his mate. And an angel only has one mate. And from what I remember this mate can be anything, supernatural being or human. You were his mate when you were human and you still are now you aren't."

"Is that true Cas?" Dean asked.

"Yes Dean."

"Well, I suppose there's no reason for me to keep this to myself then," Dean said, then he leaned forward and captured Cas's lips in an unexpected kiss. "I love you, my Angel."

Cas returned the kiss and replied to Dean's confession in kind. "I love you too, my Knight."

Dean chuckled and whispered in Cas's ear. "I'm your Knight in Devil horns." Cas blushed lightly at this, his new found knowledge of pop culture allowing him to understand that reference.