Shock (Italian: Schock) 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.

In the United States, the film was released under the title Beyond the Door II as an unofficial sequel to Beyond the Door (1974) and second entry into the Beyond the Door trilogy.