In Search of the Castaways
Loosely based upon the 1874 novel "The Mysterious Island" ("L'Île mystérieuse") by Jules Verne (which was the sequel to two other novels by Verne, 1867's "In Search of the Castaways" and 1870's "Twenty Thousand Leagues Under the Sea"), the film was produced by Charles H. Schneer and directed by Cy Endfield.