Feature version of the futuristic serial, detailing the land-and-space adventures of Buck (Larry "Buster" Crabbe) and his young pal Buddy (Jackie Moran). Wilma: Constance Moore. Rankin: Jack Mulhall. Kane: Anthony Warde. Dr. Huer: C. Montague Shaw. Aldar: Guy Usher. Kragg: William Gould. Lasca: Henry Brandon.