After Dean and Sam and Bobby catch Castiel lying about working with Crowley to open the purgatory and trapping him in the holy oil and questioning him.

Dean and others kinda lost their Trust to Castiel but the problem of Castiel was that he couldn't explain the problem properly so Dean and others could understand. Also Dean and other's problem were that they couldn't truly understand Castiel problem with rafayel and the heaven war.

That night Castiel appeared in Bobby's house looking at Dean. Dean woke up and saw Castiel. He sat up and said seriously. Obviously didn't want him to be there. "Why are you here?"

Castiel whispered. "The symbols that you painted had some problems"

Would Castiel be able to make Dean understand his problem this time? Would Dean understand Castiel for once?

(You can take each one's role you want)