Alexander Graham Bell falls in love with deaf girl Mabel Hubbard while teaching the deaf and trying to invent means for telegraphing the human voice. She urges him to put off thoughts of marriage until his experiments are complete. He invents the telephone, marries and becomes rich and famous, though his happiness is threatened when a rival company sets out to ruin him.
Don Ameche
Alexander Graham Bell
Loretta Young
Mrs. Mabel Hubbard Bell
Henry Fonda
Thomas Watson
Charles Coburn
Gardner Hubbard
Gene Lockhart
Thomas Sanders
Spring Byington
Mrs. Hubbard
Sally Blane
Gertrude Hubbard
Polly Ann Young
Grace Hubbard
