Shock is a 1977 Italian supernatural horror film directed by Mario Bava and starring Daria Nicolodi, John Steiner, and David Colin, Jr. Its plot focuses on a woman who moves into the home she shared with her deceased former husband, where she finds herself tormented by supernatural occurrences. It was Bava's last theatrical feature before he died of a heart attack in 1980.

Mario Bava was an Italian filmmaker who worked variously as a director, cinematographer, special effects artist and screenwriter. His low-budget genre films, known for their distinctive visual flair and stylish technical ingenuity, feature recurring themes and imagery concerning the conflict between illusion and reality, as well as the destructive capacity of human nature. Widely regarded as a pioneer of Italian genre cinema and one of the most influential auteurs of the horror film genre, he is popularly referred to as the "Master of Italian Horror" and the "Master of the Macabre".