William Castle became a master of gimmick-driven horror, turning moviegoing into an interactive experience. Known for directing cult favorites like House on Haunted Hill and The Tingler, Castle combined clever storytelling with unforgettable promotional stunts—ringing buzzers under seats to simulate the film’s titular creature, for example. His knack for blending suspense and camp shines in Homicidal, where a haunting family mystery unfolds with twists that keep audiences guessing. Castle’s work often featured atmospheric settings and quirky characters, capturing an earnest sense of fun in horror that influenced many. His 13 Ghosts used a unique "Illusion-O" technique, inviting viewers to interact with the ghosts on screen. These inventive choices made his films entertaining beyond their scares, securing Castle a special place among genre directors who knew how to thrill a crowd.