Castriel investigates the mass slaughter of angels and finds a lone survivor... and an old friend. Meanwhile, Sam and Dean capture Gadreel, and Metatron begins the ending of his story.
Fanfare Rondeau — Jean-Joseph Mouret
Metatron types on his typewriter, then talks about stories; (repeats) Castiel awakens tied up in Metatron's office.
The Sun Ain't Gonna Shine (Anymore) — Frankie Valli
Metatron turns on his turntable; Sam and Dean drive; Cas rips down his research wall; Metatron types his story; Cas finds followers waiting outside his hotel room.