Deze film vertelt over de confrontatie van de tweelingbroers van het Koninkrijk Leeuw met de tweelingzussen uit het Diamantgebergte. Het verhaal speelt zich af in een feodaal-middeleeuwse wereld met kasteelheren, rondreizende kooplui en zwervende straatartiesten. Koorddansers, jongleurs en vuurvreters arriveren in het koninkrijk om er aan de kinderloze koningin de komst van een tweeling te verkondigen. Maar vanaf dan treden er vreemde verschijnselen op.
Nee, helaas is Třetí princ nog niet beschikbaar op Netflix in Nederland.
| Directing | Antonín Moskalyk | Director |
| Directing | Vít Horálek | Assistant Director |
| Writing | Ota Hofman | Story |
| Writing | Stanislav Rudolf | Creative Producer |
| Writing | Karel Jaromír Erben | Book |
| Camera | Jiří Zavřel | Assistant Camera |
| Camera | Miroslav Jirsa | Still Photographer |
| Directing | Vladimír Zelenka | First Assistant Director |
| Art | Milan Nejedlý | Production Design |
| Art | Boris Moravec | Assistant Production Design |
| Camera | Pavel Dosoudil | Camera Operator |
| Art | Eva Slívová | Set Decoration |
| Crew | Ilona Přívětivá | Stunt Double |
| Crew | Cyril Neumann | Stunt Double |
| Sound | František Belfín | Conductor |
| Writing | Ota Hofman | Screenplay |
| Costume & Make-Up | František Pilný | Makeup & Hair |
| Editing | Zdeněk Stehlík | Editor |
| Crew | Marcela Pittermannová | Dramaturgy |
| Sound | Karel Jaroš | Sound |
| Crew | Ilona Šťastná | Stunt Double |
| Art | Yvetta Kornová | Set Decoration |
| Costume & Make-Up | Zuzana Bursíková | Costumer |
| Sound | Ivan Kurz | Original Music Composer |
| Costume & Make-Up | Libuše Pražáková | Costume Design |
| Costume & Make-Up | Ladislav Bacílek | Makeup & Hair |
| Production | Václav Rouha | Production Manager |
| Writing | Antonín Moskalyk | Screenplay |
| Costume & Make-Up | Petra Barochová | Costumer |
| Camera | Jiří Šámal | Director of Photography |
| Art | Jiří Matějka | Set Decoration |
| Costume & Make-Up | Zdena Prchlíková | Makeup & Hair |
| Production | Jana Hauserová | Assistant Production Manager |
| Production | Václav Dobeš | Unit Manager |
| Production | Václav Petr | Unit Manager |
| Production | Zdeňka Černá | Unit Manager |
| Directing | Eva Kubesová | Script Supervisor |
