Magic Island was a science-fantasy radio serial syndicated in the late 1930s and 1940s. The series had 130 15-minute episodes, and all episodes have survived. The storyline followed wealthy Patricia Gregory as she ended her 14-year search in the South Pacific for her long lost daughter Joan. When Joan was one year old, the Gregory yacht was shipwrecked near the 30th parallel south. Lashed to a lifeboat, Joan was presumed lost by all but Patricia. In the opening episode, she receives a tip about a white girl living on a mysterious island populated by scientifically advanced people in the Pacific. After the reunion of mother and daughter, the program dramatized their subsequent adventures on the island, which could submerge to escape detection.