A heavy condensation of the 1936 serial Flash Gordon, with altered musical score. Flash Gordon, Dale Arden and Dr. Hans Zarkov visit the planet Mongo to thwart the evil schemes of Emperor Ming the Merciless, who has set his planet on a collision course with Earth. Released abroad as "Flash Gordon" for countries not interested in booking the serial, and never shown in the USA before 1950, where the title was changed to "Rocket Ship".
| Actor | Role |
|---|---|
 Buster CrabbeFlash Gordon | Flash Gordon |
 Jean RogersDale Arden | Dale Arden |
 Charles MiddletonEmperor Ming | Emperor Ming |
 Priscilla LawsonPrincess Aura | Princess Aura |
 Frank ShannonDr. Hans Zarkov | Dr. Hans Zarkov |
 Richard AlexanderPrince Barin | Prince Barin |
 Jack 'Tiny' LipsonKing Vultan | King Vultan |
 Theodore LorchHigh Priest | High Priest |
 James PiercePrince Thun | Prince Thun |
| EEarl AskamOfficer Torch | Officer Torch |
 Richard TuckerProfessor Gordon | Professor Gordon |
 George ClevelandProfessor Henson | Professor Henson |