Buster Crabbe

Buck Rogers

Constance Moore

Wilma Deering

Jackie Moran

George 'Buddy' Wade

Anthony Warde

Killer Kane

C. Montague Shaw

Prof. Huer

William Gould

Air Marshal Kragg

Philson Ahn

Prince Tallen

Guy Usher

Aldar

Henry Brandon

Capt. Laska

Wheeler Oakman

Lt. Patten

Kenne Duncan

Lt. Lacy

Jack Mulhall

Capt. Rankin

Reed Howes

Capt. Roberts

Carleton Young

Scott

Karl Hackett

Councillor Krenko

John Harmon

Hidden City Air Controller

Wade Boteler

Prof. Wade

Al Bridge

Dynamo Room Floor Guard

Roy Butler

Control Officer

Eddy Chandler

Captain of Dirigible

Lane Chandler

Army Official at Wade's Lab

Russ Clark

Lt. Carson

James Conaty

Kane Councilman

Cyril Delevanti

Saturnian Councilman

Frank Ellis

Kane Soldier

Jack Gardner

Prof. Huer's Lab Assistant

Kenneth Harlan

Reporter at Wade's Lab

Ben Lewis

Cell Guard (uncredited)

Theodore Lorch

Kane's Council Member

Edmund Mortimer

Member of War Council

Eddie Parker

Council-Room Guard

Stanley Price

Capt. Martin / Zugg Man

David Sharpe

Kane Pilot / Hidden City Sentry / Saturnian Lieutenant

Tom Steele

Kane Pilot / Hidden City Tech / Balcony Guard