Trailer
Images
 | Luigi Pavese as Antonio Meucci |
 | Leda Gloria as Ester, sua moglie |
 | Nerio Bernardi as Alexander Graham Bell |
 | Greta Gonda as Consuelo Ispahan |
 | Osvaldo Valenti as Giovane Giuseppe Garibaldi |
 | Armando Migliari as Elisha Gray |
 | Rubi D'Alma as Liliana Montes |
| Anna Valpreda as Mary |
 | Emilio Petacci as Sam Cloton |
 | Nino Pavese as Onorevole Closter |
| Rudi Dal Pra as Ramiro Gomez |
 | Olinto Cristina as Wilson |
| Gino Bianchi as Parodi |
| Aristide Garbini as Fleming |
| Oreste Fares as Il medico |
 | Nino Marchesini as Il presidente del tribunale |
| Eugenio Duse as Il giornalista |
 | Cesare Fantoni as L'avvocato difensore |
 | Gildo Bocci |
 | Flora Volpini |
| Tullio Galvani |
| Olga von Kollar |
| Vasco Cataldo |
| Luciano Seno |
| Clara Andri |
| Ernesto Bianchi |
| Franco Barci |
| Bebi Nucci |
| Gina Spicchiesi |
| Directing | |
| Enrico Guazzoni | Director |
Writing | |
| Lucio D'Ambra | Story |
| Guido Cantini | Screenplay |
Production | |
| Angelo Tarchi | Producer |
Camera | |
| Fernando Risi | Director of Photography |
Editing | |
| Pietro Benedetti | Editor |
Sound | |
| Ezio Carabella | Music |
Art | |
| Dante Bruscani | Production Design |
