Buck Rogers
Buster Crabbe
Wilma Deering
Constance Moore
Lt. Lacy
Kenne Duncan
Capt. Rankin
Jack Mulhall
Capt. Roberts
Reed Howes
Scott
Carleton Young
Councillor Krenko
Karl Hackett
Hidden City Air Controller
John Harmon
Prof. Wade
Wade Boteler
Dynamo Room Floor Guard
Al Bridge
Control Officer
Roy Butler
Captain of Dirigible
Eddy Chandler
George 'Buddy' Wade
Jackie Moran
Army Official at Wade's Lab
Lane Chandler
Lt. Carson
Russ Clark
Kane Councilman
James Conaty
Saturnian Councilman
Cyril Delevanti
Kane Soldier
Frank Ellis
Prof. Huer's Lab Assistant
Jack Gardner
Reporter at Wade's Lab
Kenneth Harlan
Cell Guard (uncredited)
Ben Lewis
Kane's Council Member
Theodore Lorch
Member of War Council
Edmund Mortimer
Killer Kane
Anthony Warde
Council-Room Guard
Eddie Parker
Capt. Martin / Zugg Man
Stanley Price
Kane Pilot / Hidden City Sentry / Saturnian Lieutenant
David Sharpe
Kane Pilot / Hidden City Tech / Balcony Guard
Tom Steele
Prof. Huer
C. Montague Shaw
Air Marshal Kragg
William Gould
Prince Tallen
Philson Ahn
Aldar
Guy Usher
Capt. Laska
Henry Brandon
Lt. Patten
Wheeler Oakman
Director
Ford Beebe
Writer
Ray Trampe
Norman S. Hall
Cinematography
Jerome Ash
Producer
Barney A. Sarecky
Art Direction
Ralph M. DeLacy
Special Effects
Ed Keyes
Saul A. Goodkind