"Supernatural" ran for a whopping 15 seasons, not including the prequel "The Winchesters," which follows a young John and Mary Winchester before the events of the original series. The show, which was actually originally intended to be about two journalists, spans over 300 episodes of brothers Sam (Jared Padalecki) and Dean Winchester (Jensen Ackles) saving people, hunting things, and doing the family business, with a flannel shirt, a gruff voice, and a classic rock soundtrack. That's...

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