출연진
스펜서 트레이시
Thomas A. Edison
Charles Coburn
General Powell
Lynne Overman
Bunt Cavatt
Rita Johnson
Mary Stilwell
Gene Lockhart
Mr. Taggart
Henry Travers
Ben Els
Felix Bressart
Michael Simon
Peter Godfrey
Ashton
Guy D'Ennery
Lundstrom
Byron Foulger
Edwin Hall
Milton Parsons
'Acid' Graham
Arthur Aylesworth
Bigelow
Gene Reynolds
Jimmy Price
Addison Richards
Mr. Johnson
Grant Mitchell
Snade
Paul Hurst
Sheriff
George Lessey
Toastmaster
Jay Ward
John Schofield
Ann Gillis
Nancy Grey
Erville Alderson
First Lecturer
William Arnold
Minor Role