Overall : A murder mystery with a creative sci-fi time-bending spin that is fresh, compelling, and thrilling! Another movie on the list of greatest movies you probably never heard of, Frequency innovates the typical murder thriller with characters working across time to catch a prolific serial killer that killed someone they loved. Frequency skillfully builds the tension throughout, starting as a warm story of family and turning into a thrilling hunt using evidence and crime reports in the future to stop a killer before he kills a loved one in the past. Frequency's themes of family, loyalty, maturity, and hope elevate this film from a clever crime thriller to an extraordinary story with rich character development, high stakes, and an innovative plot.