Episode 58 was written by Nelson Bond and adapted for radio by John Dunkel. It was produced and directed by Norman McDonald. Dr. Grove was played by Bill Johnstone. Lieutenant Brady was played by David Ellis and Dr. Gorham was played by Ted von Eltz. Special music was arranged and played by Ivan Ditmars. A flyer is forced down on a strange island and discovers a race of superior humans preparing to take over the Earth. Harry Bartell stars.