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