Forgotten (джен)

Sam and Dean are working a case in Wyoming, but are distracted by news of a dangerous angel called "Castiel" who they can't remember ever having heard of before. The name seems a little bit familiar, but neither of the boys is sure why.
Based off of mid-season 9 (before mark of Cain, before the angel army); takes place several months later, in September 2014. Case fic wrapped in a big ol' amnesia mystery. NO SLASH; the idea is that this is something they could do on the actual show, like a 3-4 episode arc with some mini cases and a cool story running through it all. GETS VERY EMOTIONAL with super strong friendship/family themes, lotsa hurt/comfort, about three metric tons of Cas angst, feels galore, plus monsters and M&M's.