Supernatural (2005)

S9E17 Mother's Little Helper

In the episode "Mother's Little Helper," Dean decides to remain in the bunker to track down Abaddon, while Sam heads to a quaint town in Illinois. There, he looks into a series of brutal murders that have been perpetrated by individuals who appear to be innocuous. As he delves deeper into the mystery, Sam uncovers unsettling truths about the seemingly ordinary townsfolk and the sinister forces at play.