Anything can happen during Christmas Eve. Mel has to face new professional challenges and adapt to the new standards prevailing at work. Then Karina and Stephan plan to introduce serious changes in raising children. They decide to change their approach and apply somewhat sophisticated educational methods. A new woman will step in between Karolina and Filip, and the past will be reminded of Rudolf.
Unfortunately the movie Letters to Santa 4 is not yet available on HBO Max.
| Camera | Marian Prokop | Director of Photography |
| Camera | Maciej Adamczyk | Assistant Camera |
| Sound | Łukasz Targosz | Original Music Composer |
| Camera | Krzysztof Hargot | Grip |
| Visual Effects | Radosław Rekita | VFX Supervisor |
| Art | Joanna Kuś | Interior Designer |
| Writing | Mariusz Kuczewski | Writer |
| Sound | Jacek Tarkowski | Music Producer |
| Camera | Adam Mendry | Steadicam Operator |
| Art | Adrian Sosnowski | Assistant Property Master |
| Camera | Marek Zajączkowski | Aerial Camera |
| Costume & Make-Up | Adam Samsel | Assistant Costume Designer |
| Camera | Jakub Stolecki | Camera Operator |
| Art | Marek Warszewski | Set Designer |
| Camera | Ksawery Zylber | Camera Operator |
| Sound | Jacek Tarkowski | Conductor |
| Sound | Łukasz Targosz | Music Producer |
| Sound | Patrycja Bukowska | Music Consultant |
| Costume & Make-Up | Jolanta Madejska | Makeup Department Head |
| Production | Przemysław Malec | Production Manager |
| Camera | Vadim d' Erceville | Aerial Camera |
| Camera | Bartłomiej Piętka | Grip |
| Production | Aleksandra Rybołowicz | Data Management Technician |
| Costume & Make-Up | Małgorzata Bednarek-Chumakou | Costume Design |
| Sound | Sebastian Aleksandrowicz | Musician |
| Camera | Mariusz Hargot | Grip |
| Production | Ewelina Król | Assistant Production Manager |
| Crew | Adrian Luzar | Public Relations |
| Crew | Piotr Nawrocki | Stunts |
| Crew | Radosław Ozimkiewicz | Stunts |
| Crew | Aneta Kielak | Catering |
| Production | Piotr Bartuszek | Casting |
| Camera | Stanisław Horodecki | Camera Operator |
| Art | Paweł Stachowiak | Props |
| Art | Rafał Antoszkiewicz | Assistant Property Master |
| Crew | Dominika Jaworska | Stunts |
| Crew | Tomasz Lipski | Stunts |
| Sound | Jacek Tarkowski | Musician |
| Crew | Wojciech Konkol | Health and Safety |
| Crew | Agata Wojciechowska | Public Relations |
| Camera | Robert Romaniuk | Aerial Camera |
| Lighting | Artur Zabiegałowski | Master Lighting Artist |
| Art | Paweł Łuszczyński | Assistant Property Master |
| Crew | Piotr Słupiński | Stunts |
| Production | Natalia Łukawska | Assistant Production Manager |
| Sound | Krzysztof Owczarek | Sound |
| Crew | Jacek Kwaśniewski | Police Consultant |
| Crew | Jacek Jeleń | Stunt Coordinator |
| Crew | Paweł Poletyło | Stunts |
| Crew | Jan Słupski | Catering |
| Camera | Maciej Tomków | Steadicam Operator |
| Sound | Łukasz Targosz | Musician |
| Sound | Michał Górczyński | Musician |
| Production | Marta Grela-Gorostiza | Supervising Producer |
| Camera | Marcin Makowski | Still Photographer |
| Crew | Zyta Bujacz-Dziel | Stunts |
| Crew | Beata Duda | Stunts |
| Crew | Janusz Mazurkiewicz | Stunts |
| Writing | Marcin Baczyński | Writer |
| Editing | Kamil Komorek | Digital Intermediate |
| Crew | Tomasz Blaszkowski | Catering |
| Crew | Jacek Jeleń | Stunts |
| Crew | Artur Mikołajewski | Stunts |
| Production | Anna Waśniewska-Gill | Production Supervisor |
| Sound | Grzegorz Sieradzki | Sound Effects Editor |
| Sound | Krzysztof Owczarek | Dialogue Editor |
| Sound | Łukasz Świerzawski | Sound Editor |
| Sound | Radosław Adamski | Boom Operator |
| Sound | Patryk Gąstoł | Sound Effects |
| Sound | Paweł Krajewski | Boom Operator |
| Sound | Łukasz Świerzawski | Sound Effects Editor |
| Sound | Małgorzata Czuro | Sound Effects |
| Sound | Jacek Rychły | ADR Editor |
| Sound | Małgorzata Czuro | Sound Effects Editor |
| Sound | Krzysztof Bogucki | Boom Operator |
| Sound | Jacek Tarkowski | ADR Recordist |
| Sound | Łukasz Tuński | Boom Operator |
| Sound | Maciej Pawłowski | Dialogue Editor |
| Sound | Grzegorz Koniarz | Sound Effects |
| Sound | Krzysztof Owczarek | Sound Recordist |
| Sound | Jacek Rychły | ADR Recordist |
| Sound | Łukasz Świerzawski | Sound Designer |
| Sound | Grzegorz Sieradzki | Sound Effects |
| Production | Tomasz Blachnicki | Producer |
| Production | Marta Pasławska | Producer's Assistant |
| Sound | Przemysław Kamieński | Sound |
| Production | Przemysław Malec | Production Coordinator |
| Editing | Jarosław Barzan | Editorial Coordinator |
| Sound | Maciej Pawłowski | Sound |
| Directing | Patrick Yoka | Director |
| Art | Marek Warszewski | Art Direction |
| Art | Janusz Bieniek | Title Designer |
