Mickey RooneyThomas Alva 'Tom' Edison George BancroftSamuel 'Sam' Edison Fay BainterMrs. Samuel 'Nancy' Edison Virginia WeidlerTannie Edison Eugene PalletteMr. Nelson Bobby JordanJoe 'Joey' Dingle Eily MalyonMiss Lavina Howard, School Teacher Harry ShannonArmy Captain Brackett Ernie AdamsPassenger Buying Maple Sugar Maude AllenWoman Fainting at Downed Bridge Jessie ArnoldWoman at Station Polly BaileyWoman at Station Sherwood BaileyRed, Joe's Friend Jack BaxleyMan at Dingle's Store Arthur BelascoTelegrapher Sammy BlumTrain Passenger Stanley BlystoneArmy Officer on Train Leigh De LaceyTrain Passenger John Webb DillionMan at Station Olin HowlandTelegrapher (Indian Attack) Philip HurlicBlack Boy at Tree Mitchell IngrahamMan at Station Del LawrenceTrain Passenger Mitchell LewisMcGuire - Train Engineer George MagrillTrain Passenger Wally MaherMan at Station Claire McDowellWoman at Station Frances MorrisWoman at Station Lee PhelpsTrain Engineer Miller Mickey RentschlerJohnny, Joe's Friend Marion SheldonTrain Passenger Marvin StephensFrank Allen Forrest TaylorTrain Passenger Spencer TracyMan Admiring Portrait of Thomas A. Edison Frank WhitbeckNarrator (voice) Al ThompsonMan at Station J.M. KerriganMr. McCarney John W. Considine Jr.Producent Orville O. DullAssociate Producer Cedric GibbonsArt Direction Sidney WagnerDirector Of Photography 
