Mickey Rooney
Thomas Alva 'Tom' Edison
George Bancroft
Samuel 'Sam' Edison
Fay Bainter
Mrs. Samuel 'Nancy' Edison
Virginia Weidler
Tannie Edison
Eugene Pallette
Mr. Nelson
Bobby Jordan
Joe 'Joey' Dingle
Eily Malyon
Miss Lavina Howard, School Teacher
Harry Shannon
Army Captain Brackett
Ernie Adams
Passenger Buying Maple Sugar
Maude Allen
Woman Fainting at Downed Bridge
Jessie Arnold
Woman at Station
Polly Bailey
Woman at Station
Sherwood Bailey
Red, Joe's Friend
Jack Baxley
Man at Dingle's Store
Arthur Belasco
Telegrapher
Sammy Blum
Train Passenger
Stanley Blystone
Army Officer on Train
Leigh De Lacey
Train Passenger
John Webb Dillion
Man at Station
Olin Howland
Telegrapher (Indian Attack)
Philip Hurlic
Black Boy at Tree
Mitchell Ingraham
Man at Station
Del Lawrence
Train Passenger
Mitchell Lewis
McGuire - Train Engineer
George Magrill
Train Passenger
Wally Maher
Man at Station
Claire McDowell
Woman at Station
Frances Morris
Woman at Station
Lee Phelps
Train Engineer Miller
Mickey Rentschler
Johnny, Joe's Friend
Marion Sheldon
Train Passenger
Marvin Stephens
Frank Allen
Forrest Taylor
Train Passenger
Spencer Tracy
Man Admiring Portrait of Thomas A. Edison
Frank Whitbeck
Narrator (voice)
Al Thompson
Man at Station
J.M. Kerrigan
Mr. McCarney
