13 Frightened Girls! (1963): Directed by William Castle

William Castle launched a worldwide hunt for the prettiest girls from different countries to cast in 13 Frightened Girls!. The stunt helped generate publicity for the film about the thirteen daughters of international diplomats in a Swiss boarding school, who stir up trouble when they mess in the diplomatic affairs of their parents and a Russian spy is discovered murdered. 13 Frightened Girls! has a running time of 89 minutes and is not rated.