Natalie Wood was one of Hollywood's biggest stars when her body washed up on a beach Thanksgiving weekend, 1981. Robert Wagner, also a huge star, has acknowledged that he and his wife argued before she disappeared off their yacht, which was anchored in a Catalina Island, California, harbor. Crime Stories re-examines the cause of death, which the Los Angeles coroner recently reclassified from "accidental" to "undetermined." The first episode in our series is with Sheryl McCollum, head of the Cold Case Investigative Research Institute.