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.
| Directing | Irving Cummings | Director |
| Writing | Ray Harris | Story |
| Writing | Lamar Trotti | Screenplay |
| Production | Darryl F. Zanuck | Producer |
| Editing | Walter Thompson | Editor |
| Art | Richard Day | Art Direction |
| Art | Mark-Lee Kirk | Art Direction |
| Art | Thomas Little | Set Decoration |
| Costume & Make-Up | Royer | Costume Design |
| Camera | Leon Shamroy | Director of Photography |
| Directing | Ad Schaumer | Assistant Director |
| Production | Kenneth Macgowan | Associate Producer |
| Sound | Louis Silvers | Music Director |
