: The seemingly bumbling but sharp retired detective who begins investigating the "disappearance." Key Themes and Style

: The tough, calculating mistress who masterminds the plan.

: The director's wife, playing the fragile, deeply religious, and terrified school owner.

If you'd like, I can provide a (spoilers included) or list some similar classic thrillers to watch next.

: Unlike the stylized thrillers of Hollywood at the time, Les Diaboliques is noted for its gritty, "dirty" realism, depicting the school and its inhabitants with cynical detail. Historical Significance