A series of disturbing deaths plague Southern California, prompting a private investigator to search for answers (Tony Franciosa), while the lead detective attempts to suppress the strange circumstances (Vic Morrow). A client enlists the investigator’s help; he happens to have a twin sister (Donna Mills and Patty Duke). “Curse of the Black Widow” (1977) shares similarities with other spooky TV-movie thrillers from…

Mills enlists private investigator Franciosa to look into her husband's passing, but the inquiry quickly uncovers a string of killings targeting men connected to her. These victims are found in a bizarre state, seemingly encased and injected with poison. Police officer Morrow grows increasingly frustrated and urges Franciosa toward a resolution that can be documented. Director Curtis is given considerable freedom to …