Dean quickly got up and ran to Cass, arms raised in surrender. "Woah, woah, Cass, it's me." Dean tried to hold on to Cass' shoulders but Cass forcefully pushed Dean off, causing Dean to fall backwards. Cass pulled out his angel blade from underneath his trench coat and started towards Dean.
"Get out of Dean," Castiel said calmly but powerfully. Cass could see the demon's hideous and grotesque face alternate with Dean's vivid green eyes, make Cass feel as if he was experiencing whiplash.
"Cass!", Dean tried again, "I'm not being possessed! I'm – I'm one of them now." Dean watched as Cass hand carrying the blade wavered slightly, but did not lower. "It was the Mark, I swear to you."
"You're lying." Cass stood strong and still. Dean's words had made no visible effect on Cass so tried a different tactic instead. If Cass wouldn't believe him, he would believe Sam.
"Think of Sam's prayers. And don't tell me that he didn't pray to you," Dean commented when he saw Cass tilt his head.
That made Cass start to lower the blade, and Dean knew it would. Sam always had more faith than Dean, so Dean knew that Sam would immediately turn to Cass for help. That's what both of them always did. The angel blade was finally completely by Cass' side. Dean didn't know how many times Sam prayed to him, but it must have been a substantial amount.
"You never answered him." Dean didn't pose it as a question.
This time Cass actually looked guilty, but still glared hard at Dean. "Sam never said you had turned into a monster."
Dean froze for a second before getting back on his feet. He looked wounded but asked, "Can we talk about this, man?"
Twenty minutes later, Dean and Cass had almost settled into the foyer of the Bunker. Dean was comfortably lounging in a chair with his feet on the table, feeling surprising confident despite Cass' last remark. Cass, on the other hand, was sitting, but his back was completely straight and his hands were folded in his lap. When neither of them spoke, Dean finally decided to break the silence, taking his feet off the table.
"Look, Cass," Dean started, his confidence and relaxation that he had just felt slowly fading way, and Dean continued telling Cass everything, starting with Dean working with Crowley to Sam and Dean finding Metatron and eventually ending with Dean becoming a demon. During Dean's story, Cass only shifted slightly when Dean was telling him what Metatron had said and how he killed Dean. "So we good?" Dean asked after pausing to let everything sink in with Cass.
Cass tilted his head and furrowed his eyebrows. After some time, Cass responded, "We are good, Dean."
Dean smiled, let out a breath he didn't know he was holding, and relaxed once again in his chair. "It's really good to see you, man. So, what happened with all the heaven crap and stuff?"
Now it was time for Castiel to tell his story and for Dean to listen. Castiel talked about his and Gadreel's plan to enter heaven, how it turned out to be a trap, and finally how Cass tricked Metatron into revealing his true self on angel radio.
Dean started laughing when he heard how Metatron met his downfall. "Nice one, Cass! At least that douchebag won't be ruling heaven or anyone else for a long time." Dean slapped his hand on the table in triumph and stood up with his arms spread out wide. "Alright. So you have your angel mojo back. Fix me."
Cass stood up too, but a look of confusion spread across his face. "I do not understand."
Dean started to become confused once Cass said that. "What do you mean? Do some magic or something," Dean said, gesturing wildly. "Get this demon out of me."
"Dean" Cass started solemnly. He took a step towards Dean, making Dean become nervous. Before Dean could get a word out about a reminder about personal space, Cass spoke again. "You said yourself before. You are not possessed. This is something that I cannot fix. There is no cure."
Dean took several steps back away from Cass and shook his head repeatedly. "No!" Dean screamed and took a swipe at the books on the table, sending piles of them crashing to the floor. He walked closer to Cass, so close that their faces were almost touching. Dean spoke slowly but his words were filled with cruelty. "You are an angel. You heal people. So do your damn job." And, with that, Dean turned and stormed off to his room, slamming the door behind him.
