Young Tom Edison

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

Victor Kilian

Mr. Dingle

Bobby Jordan

Joe 'Joey' Dingle

Lloyd Corrigan

Dr. Pender

John Kellogg

Bill Edison

Clem Bevans

Mr. Waddell

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

John Beck

Bartender

Arthur Belasco

Telegrapher

Sammy Blum

Train Passenger

Stanley Blystone

Army Officer on Train

Wade Boteler

Si Weaver

Eddy Chandler

Mr. Briggs

Jack Daley

Man at Station

Leigh De Lacey

Train Passenger

John Webb Dillion

Man at Station

Fern Emmett

Mrs. McCarney

Budd Fine

Train Passenger

Olin Howland

Telegrapher (Indian Attack)

Philip Hurlic

Black Boy at Tree

John Ince

Man at Station

Mitchell Ingraham

Man at Station

Milton Kibbee

Baggage Man

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

Emory Parnell

Bob

Lee Phelps

Train Engineer Miller

Victor Potel

Mr. Tompkins

Mickey Rentschler

Johnny, Joe's Friend

Marion Sheldon

Train Passenger

Buster Slaven

Boy at Tree

Marvin Stephens

Frank Allen

Harry Strang

Army Officer

Forrest Taylor

Train Passenger

Spencer Tracy

Man Admiring Portrait of Thomas A. Edison

Frank Whitbeck

Narrator (voice)

Joe Whitehead

Mr. Hodge

Al Thompson

Man at Station

J.M. Kerrigan

Mr. McCarney