Just a few years after the first filmmakers emerged in the mid-1890s, Mellies created Le Manoir du Diable, sometimes known in English as The Haunted Castle or The House of the Devil, in 1896, and it is widely believed to be the first horror movie.
While Supernatural ran for a total of 15 seasons, the series changed drastically over time, and arguably, only got worse and worse after season 5.