Antonio Meucci

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