A Golden Clue The Boys find a clue they think will solve the mystery of the Applegate treasure. Details Casts Title A Golden Clue Genres Kids Mystery Release Date 1956-12-28 Episode Runtime 00 Hours 30 Minutes Season Number 1 Episode Number 15 Production Companies Walt Disney Productions Tim Considine Frank Hardy Tommy Kirk Joe Hardy Florenz Ames Silas Applegate Russ Conway Fenton Hardy Sarah Selby Aunt Gertrude Hardy Robert Foulk Jackley the Plumber Carole Ann Campbell Iola Morton Donald MacDonald Perry Robinson Arthur Shields Boles