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