En film om uppfinnaren Thomas Edisons liv.
Spencer Tracy
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
