David Marshall Williams is sent to a prison farm where he works in the tool shop and eventually develops the precursor of the famous M-1 Carbine automatic rifle used in World War II.
James Stewart
as Marsh Williams
Jean Hagen
as Maggie Williams
Wendell Corey
as Capt. H.T. Peoples
Carl Benton Reid
as Claude Williams
Paul Stewart
as 'Dutch' Kruger
Otto Hulett
as Mobley
Rhys Williams
as Redwick Karson
Herbert Heyes
as Lionel Daniels
James Arness
as Leon Williams
Porter Hall
as Sam Markley
Fay Roope
as District Attorney
Ralph Dumke
as Andrew White
