Based on Leo Tolstoy's novel, Father Sergius, Night Sun stars Julian Sands as Sergio, a nobleman in 18th-century Italy who is expected to marry a duchess, Nastassja Kinski. Upon learning that she was previously the King's mistress, Sergio turns his back on society and becomes a monk. While at the hermitage he tries to resist all sexual temptations before him and soon becomes known as a miracle worker. Eventually he succumbs to a young seductress and knowing he is undeserving of the adulation, leaves the hermitage to travel around as a homeless beggar.
| Actor | Role |
|---|---|
 Julian SandsSergio Giuramondo | Sergio Giuramondo |
 Nastassja KinskiCristina | Cristina |
 Charlotte GainsbourgMatilda | Matilda |
 Rüdiger VoglerKing Charles | King Charles |
 Massimo BonettiPrince Santobuono | Prince Santobuono |
 Sonia GessnerDuchess Del Carpio | Duchess Del Carpio |
 Riccardo Parisio PerrottiDuke Del Carpio | Duke Del Carpio |
 Margarita LozanoSergio's Mother | Sergio's Mother |
 Patricia MillardetAurelia | Aurelia |
 Pamela VilloresiGiuseppina Giuramondo | Giuseppina Giuramondo |
 Geppy GleijesesBishop | Bishop |
 Tony SperandeoGesuino | Gesuino |
| SSalvatore RossiEugenio | Eugenio |
 Matilde PianaPeasant Woman | Peasant Woman |
| TTeresa BrescianiniConcetta | Concetta |
 Biagio BaroneFather Biagio | Father Biagio |
 Ferdinando MuroloLawyer | Lawyer |
 Aleksander MincerOrgan Player | Organ Player |
 Ubaldo Lo PrestiMinister | Minister |
 Carlo Luca De RuggieriGesuino's Son | Gesuino's Son |
 Maria Antonia CapotortoLivia | Livia |
 Marco Di StefanoOfficer in Coach | Officer in Coach |
 Fausto LombardiNot listed | Not listed |
 Carlo Di MaioNot listed | Not listed |
 Dora RomanoNot listed | Not listed |