Reparto (por orden de créditos)
Buster Crabbe
Flash Gordon (archiveFootage)
Carol Hughes
Dale Arden (archiveFootage)
Charles Middleton
Ming the Merciless (archiveFootage)
Frank Shannon
Dr. Zarkov (archiveFootage)
Don Rowan
Capt. Torch (archiveFootage)
Victor Zimmerman
Lt. Thong (archiveFootage)
Lee Powell
Capt. Roka (archiveFootage)
Donald Curtis
Capt. Ronal (archiveFootage)
Edgar Edwards
Capt. Turan (archiveFootage)
Roland Drew
Prince Barin (archiveFootage)
Shirley Deane
Princess Aura (archiveFootage)
Luli Deste
Queen Fria (archiveFootage)
Sigurd Nilssen
Count Korro (archiveFootage)
John Hamilton
Prof. Gordon (archiveFootage)
Herbert Rawlinson
Prof. Frohman (archiveFootage)
Tom Chatterton
Dr. Arden (archiveFootage)
Roy Barcroft
Ming Soldier (uncredited) (archiveFootage)
Allan Cavan
Man of High Intelligence (uncredited) (archiveFootage)
Lane Chandler
Radio Room Adjutant (uncredited) (archiveFootage)
Carmen D'Antonio
Ming Dancing Girl (uncredited) (archiveFootage)
Earl Dwire
Jenda (uncredited) (archiveFootage)
Anne Gwynne
Female Spy in Arboria (uncredited) (archiveFootage)
Michael Mark
Prof. Karm (uncredited) (archiveFootage)
Jack Roper
Man of Low Intelligence (uncredited) (archiveFootage)
William Royle
Capt. Suden (uncredited) (archiveFootage)
Ben Taggart
Gen. Lupi (uncredited) (archiveFootage)
