It: Welcome to Derry hits HBO October 26, bringing Pennywise the Clown out of the sewer to feast on a new generation of children. It remains to be seen if Derry will rank among the scariest Stephen King adaptations — we have a feeling it might —but there are still plenty of chilling movies and TV releases that draw on King’s prolific output to make your nights as sleepless as possible.

10. Cujo (1983)

Based on King’s 1981 novel about a St. Bernard who transforms from a gentle pooch into a vicious, violent monster after tangling with a rabid bat, the 1983 movie makes a few key plot changes, including softening the ending. However, the movie is still deeply unsettling, with the dangers of being trapped in a car with no water on a scorching day very nearly eclipsing the terror of

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