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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.
Doug's parents (Jenny O'Hara, Dakin Matthews) visit while Carrie's on a business trip and they take over running the house, which makes Doug feel like a kid again. Also, Arthur tries to strike it rich by inventing a new type of screwdriver called the Arthu (more…)