The Devil in the Details

• How long will it take Sam and Dean to realize Castiel is NOT Castiel?
• What will happen to Crowley, now?
• Will Castiel be able to expel Lucifer when the time comes?
• What happens to the Book of the Damned now that Rowena is dead?
• In Rowena's dream, she recognized Lucifer when Santa-Lucifer removed his beard. But Rowena had never met Lucifer before then, so how would she know what he looked like?

• Rowena was working with Lucifer to trick Sam back into the cage.
• Sam does feel guilty about leaving Dean in purgatory (assuming Lucifer was not lying about that).
• Dean and Sam truly believe in each other again.
• "Smiting Sickness" is a thing, and angels are immune to it.
• Lucifer thinks Sam is prissy, and that not looking for Dean when he was in purgatory was the worst thing Sam has ever done.

• Child-Crowley gets a Funko Sam Winchester doll for Christmas in Rowena's dream
• John Winchester took Dean and Sam to Mexico to hunt a chupacabra when Sam was younger. During that trip, they saw Aztec temples.
• Crowley and Rowena both take their tea with honey and milk

• "Girl Power" was a social phenomenon in the 1990s.
• A "droog" refers to a thug or a street gang member.
• According to Castiel, the last time heaven smote someone so powerfully, "Lot's wife turned to salt." This is a reference to the biblical story about the destruction of Sodom and Gomorrah. Lot and his family were fleeing god's wrath, but Lot's wife turned around to look at the destruction and was turned to salt.
• A device called a "with catcher" actually existed, but it was a weapon (a point and a hook) on the end of a long pole; it was intended to keep a witch at a distance and prevent the witch from being able to touch another person.
• "Oedipal" refers to a psychological concept called the Oedipus complex, used to describe an attraction between a man (or boy) and his mother. The concept is derived from the actions of a mythical Greek king (Oedipus) who killed his father so he could marry his mother.
• "50 Shades" refers to the book and movie "50 Shades of Grey" that depicts erotic bondage.

• "Changing Tracks" - by Wishbone Ash (plays during "The Road So Far")
• "Has Anybody Seen Chris Kringle" -- by Hal David and John Cacavas (plays during Rowena's dream)
• "De Camptown Races" -- by Steven Foster (Dean sings the song reluctantly as the password to enter the warehouse)
• "Heaven Must Be Missing An Angel" -- by The Tavares (plays while Lucifer, Castiel, Dean and Sam are in the cage)

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