Season 9, Episode 17 Mother's Little Helper
First Aired: March 25, 2014
Sam visits a town where ordinary people are turning into violent murderers. His investigation reveals that the Men of Letters came to the town in 1958. Meanwhile, Dean struggles with effects from the Mark of Cain and is tested by Crowley.
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- Premiered: September 21, 2006
- Rating: TV-14
- Premise: Two brothers hunt demons, ghosts and other supernatural entities as they investigate crimes caused by paranormal forces. (more)