Flash Gordon Conquers the Universe - Chapter Four: The Destroying Ray

Flash Gordon Conquers the Universe (1940)
A Universal Pictures Company Production

Chapter Four: The Destroying Ray

A mysterious plague, the Purple Death, ravages the earth. Dr. Zarkov, investigating in his spaceship, finds a ship from planet Mongo seeding the atmosphere with dust. Sure enough, Ming the Merciless is up to his old tricks. So it's back to Mongo for Flash, Dale, and Zarkov, this time with ready-made allies waiting: Prince Barin of Arboria and Queen Fria of the frozen northern land of Frigia; where, it so happens, is found polarite, antidote to the plague. But Ming will use all his forces to keep our heroes from thwarting his plans of conquest...

Directors:
Ford Beebe and Ray Taylor

Cast
Larry 'Buster' Crabbe - Flash Gordon,
Carol Hughes - Dale Arden,
Charles Middleton - Emperor Ming,
Anne Gwynne – Sonja,
Frank Shannon - Dr. Alexis Zarkov,
John Hamilton - Prof. Gordon,
Herbert Rawlinson - Dr. Frohmann,
Tom Chatterton - Prof. Arden,
Shirley Deane - Princess Aura,
Lee Powell - Capt. Roka,
Roland Drew - Prince Barin,
Don Rowan - Capt. Torch,
Victor Zimmerman - Lt. Thong,
Edgar Edwards - Capt. Turan,
Ben Taggart - Gen. . Lupi,
Michael Mark - Prof. Karm,
Earl Dwire - Janda,
Harry C. Bradley - Keedish,
Sigurd Nilssen - Count Korro,
Mimi Taylor - Verna,
Byron Foulger - Prof. Drok,
William Royle - Capt. Sudan,