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.
Buster Crabbe
as Flash Gordon
Jean Rogers
as Dale Arden
Charles Middleton
as Emperor Ming
Priscilla Lawson
as Princess Aura
Frank Shannon
as Dr. Hans Zarkov
Richard Alexander
as Prince Barin
Jack 'Tiny' Lipson
as King Vultan
Theodore Lorch
as High Priest
James Pierce
as Prince Thun
Earl Askam
as Officer Torch
Richard Tucker
as Professor Gordon
George Cleveland
as Professor Henson
