Sudden Fear is a suspense drama tailored for Joan Crawford. It allows the actress to experience a familiar gamut of emotions, encompassing ecstatic love, fear, hate and revenge. It is essentially a routine chiller [from a story by Edna Sherry], replete with more or less clever gimmicks, but mounted handsomely.
Crawford is presented as a playwright-heiress. Eminently successful at her craft, she falls in love and marries an actor whom she had considered unsuited for the lead in her play. The union is idyllic until she discovers accidentally, via a dictating machine, that her husband had only married her for her money and with the aid of an old flame is planning her murder.
Crawford scores in this type of role.