A young communist discovers the power of faith.
| Actor | Role |
|---|---|
 May BrittNadia Ulianova, periodista Soviética | Nadia Ulianova, periodista Soviética |
 Francisco RabalSergio Gresky | Sergio Gresky |
 Bernard BlierDon Lorenzo | Don Lorenzo |
| VVera CarmiElena Ulianova, hermana de Nadia | Elena Ulianova, hermana de Nadia |
 Julio PeñaRuggero Scotto | Ruggero Scotto |
 Cristina GradoSusana | Susana |
 Nino ManfrediMario Giorgi | Mario Giorgi |
| AAugusto PennellaNandino | Nandino |
 Miranda CampaNot listed | Not listed |
 Ada ColangeliNot listed | Not listed |