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troperville

Sam and Dean investigate a once-reputable town whose citizens have turned to drinking and gambling. They search for demonic activity, but find out that this time it's the humans who are really corrupt.

Tropes

Anti Anti Christ: Sam.
Call Back: Like the Yellow-Eyed Demon, the demon in Casey says the Apocalypse would be the start of the beginning, not the end.
- About Sam possibly coming back different, like the Yellow-Eyed Demon Said.
Dark Is Not Evil: played with. The demon Dean gets trapped with claims she just wants to carry out her life the same as anyone, and she has some valid points about the human race... but then again, she could be lying.
Famed in Story: The Winchesters, especially Sam among the demons.
Hey, It's That Guy!: General Hammond has turned amoral.
Not So Different
Sinister Minister: Possessed by a demon.
Together in Death
Your Approval Fills Me with Shame: Dean doesn't exactly take being liked by a demon as a compliment.