Supernatural will go meta - and musical - for its 200th episode. Supernatural will go meta - and musical - for its 200th episode. 'Supernatural' To End After Season 10? Execs Talk Winchesters' Future The CW series has never been afraid of working their fandom into the story line - think Carver Edlund's in-series Supernatural books, "Meta Fiction," and "The French Mistake" - but the landmark episode will take the theme above and beyond the norm.

Could 'Supernatural' come to an end now that Dean is a demon and Castiel's grace is failing

'Supernatural' Season 10 Spoilers: Set Photo Captures Misha Collins & Jensen Ackles Together, What Are Dean & Cas Up To In 'Soul Survivor'? [VIDEO]

Metatron is behind bars, but Castiel will still battle his angelic kin during season 10 Season 10 of Supernatural will be another rough one for Castiel, or so it would seem from the angel's bloody face in a recent set photo.