Thomas Edison

Mickey Rooney

Nancy Edison

Fay Bainter

Samuel 'Sam' Edison

George Bancroft

Tannie Edison

Virginia Weidler

Mr. Nelson

Eugene Pallette

Mr. Dingle

Victor Kilian

Joe "Joey" Dingle

Bobby Jordan

Mr. McCarney

J.M. Kerrigan

Dr. Pender

Lloyd Corrigan

Bill Edison

John Kellogg

Mr. Waddell

Clem Bevans

Miss Lavina Howard, School Teacher

Eily Malyon

Army Captain Brackett

Harry Shannon

Passenger Buying Maple Sugar

Ernie Adams

Woman Fainting at Downed Bridge

Maude Allen

Captain Brackett

Pedro de Cordoba

Woman at Station

Jessie Arnold

Woman at Station

Polly Bailey

Red, Joe's Friend

Sherwood Bailey

Man at Dingle's Store

Jack Baxley

Bartender

John Beck

Telegrapher

Arthur Belasco

Train Passenger

Sammy Blum

Army Officer on Train

Stanley Blystone

Si Weaver

Wade Boteler

Mr. Briggs

Eddy Chandler

Man at Station

Jack Daley

Train Passenger

Leigh De Lacey

Man at Station

John Webb Dillon

Man at Station

John Webb Dillion

Mrs. McCarney

Fern Emmett

Train Passenger

Budd Fine

Telegrapher (Indian Attack)

Olin Howland

Black Boy at Tree

Philip Hurlic

Man at Station

John Ince

Man at Station

Mitchell Ingraham

Baggage Man

Milton Kibbee

Train Passenger

Del Lawrence

McGuire - Train Engineer

Mitchell Lewis

Train Passenger

George Magrill

Man at Station

Wally Maher

Woman at Station

Claire McDowell

Woman at Station

Frances Morris

Bob

Emory Parnell

Train Engineer Miller

Lee Phelps

Mr. Tompkins

Victor Potel

Johnny, Joe's Friend

Mickey Rentschler

Train Passenger

Marion Sheldon

Boy at Tree

Buster Slaven

Frank Allen

Marvin Stephens

Army Officer

Harry Strang

Train Passenger

Forrest Taylor

Man Admiring Portrait of Thomas A. Edison

Spencer Tracy

Narrator (voice)

Frank Whitbeck

Mr. Hodge

Joe Whitehead

Man at Station

Al Thompson