Supernatural (TV series)/Recap/S07/E05 Shut Up, Dr. Phil!

Season 7, Episode 05:

Shut Up, Dr Phil
Sam and Dean deal with a witch who is using her powers to terrorize a small town. They soon discover that she is taking out her anger with her husband, who she discovered was having an affair.

Tropes

 * Aw, Look -- They Really Do Love Each Other
 * Bury Your Gays: Sue.
 * Disproportionate Retribution
 * Karma Houdini - The witches never receive any punishment for the people they killed.
 * Hey, It's That Guy! - Spike and Cordelia are married. And witches.
 * The Masochism Tango
 * Mistaken for Cheating
 * Villainous Rescue