Story focusing on the search for a couple who disappeared where ships and planes have vanished. Harry: Fred MacMurray. Jed: Sam Groom. Claudia: Donna Mills. Jill: Suzanne Reed. Wendy: Dana Plato. Caldas: Dan White. Doyle: Ric O'Feldman. Filmed on location in Fort Lauderdale, Fla. William A. Graham directed.