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 |
| Art | Paweł Łuszczyński | Assistant Property Master |
| Writing | Mariusz Kuczewski | Writer |
| Writing | Marcin Baczyński | Writer |
| Art | Marek Warszewski | Set Designer |
| Sound | Łukasz Targosz | Music Producer |
| Camera | Stanisław Horodecki | Camera Operator |
| Camera | Robert Romaniuk | Aerial Camera |
| Art | Paweł Stachowiak | Props |
| Art | Adrian Sosnowski | Assistant Property Master |
| Camera | Bartłomiej Piętka | Grip |
| Editing | Kamil Komorek | Digital Intermediate |
| Camera | Jakub Stolecki | Camera Operator |
| Production | Piotr Bartuszek | Casting |
| Camera | Krzysztof Hargot | Grip |
| Camera | Maciej Tomków | Steadicam Operator |
| Art | Joanna Kuś | Interior Designer |
| Costume & Make-Up | Małgorzata Bednarek-Chumakou | Costume Design |
| Camera | Vadim d' Erceville | Aerial Camera |
| Camera | Adam Mendry | Steadicam Operator |
| Lighting | Artur Zabiegałowski | Master Lighting Artist |
| Visual Effects | Radosław Rekita | VFX Supervisor |
| Art | Rafał Antoszkiewicz | Assistant Property Master |
| Camera | Ksawery Zylber | Camera Operator |
| Camera | Marek Zajączkowski | Aerial Camera |
| Camera | Mariusz Hargot | Grip |
| Costume & Make-Up | Adam Samsel | Assistant Costume Designer |
| Sound | Łukasz Targosz | Musician |
| Production | Aleksandra Rybołowicz | Data Management Technician |
| Sound | Jacek Tarkowski | Music Producer |
| Sound | Jacek Tarkowski | Musician |
| Sound | Jacek Tarkowski | Conductor |
| Costume & Make-Up | Jolanta Madejska | Makeup Department Head |
| Crew | Tomasz Lipski | Stunts |
| Crew | Artur Mikołajewski | Stunts |
| Crew | Piotr Nawrocki | Stunts |
| Crew | Dominika Jaworska | Stunts |
| Crew | Jacek Kwaśniewski | Police Consultant |
| Crew | Wojciech Konkol | Health and Safety |
| Camera | Marcin Makowski | Still Photographer |
| Crew | Janusz Mazurkiewicz | Stunts |
| Crew | Adrian Luzar | Public Relations |
| Crew | Radosław Ozimkiewicz | Stunts |
| Crew | Piotr Słupiński | Stunts |
| Sound | Sebastian Aleksandrowicz | Musician |
| Crew | Aneta Kielak | Catering |
| Crew | Jacek Jeleń | Stunt Coordinator |
| Sound | Michał Górczyński | Musician |
| Sound | Patrycja Bukowska | Music Consultant |
| Crew | Jacek Jeleń | Stunts |
| Crew | Zyta Bujacz-Dziel | Stunts |
| Crew | Jan Słupski | Catering |
| Crew | Agata Wojciechowska | Public Relations |
| Crew | Paweł Poletyło | Stunts |
| Production | Przemysław Malec | Production Manager |
| Production | Marta Grela-Gorostiza | Supervising Producer |
| Production | Natalia Łukawska | Assistant Production Manager |
| Sound | Krzysztof Owczarek | Sound |
| Production | Anna Waśniewska-Gill | Production Supervisor |
| Crew | Beata Duda | Stunts |
| Crew | Tomasz Blaszkowski | Catering |
| Production | Ewelina Król | Assistant Production Manager |
| Sound | Małgorzata Czuro | Sound Effects |
| Sound | Patryk Gąstoł | Sound Effects |
| Sound | Paweł Krajewski | Boom Operator |
| Sound | Krzysztof Bogucki | Boom Operator |
| Sound | Krzysztof Owczarek | Sound Recordist |
| Sound | Jacek Rychły | ADR Editor |
| Sound | Radosław Adamski | Boom Operator |
| Sound | Łukasz Tuński | Boom Operator |
| Sound | Małgorzata Czuro | Sound Effects Editor |
| Sound | Grzegorz Sieradzki | Sound Effects Editor |
| Sound | Grzegorz Koniarz | Sound Effects |
| Sound | Jacek Rychły | ADR Recordist |
| Sound | Grzegorz Sieradzki | Sound Effects |
| Sound | Krzysztof Owczarek | Dialogue Editor |
| Sound | Łukasz Świerzawski | Sound Editor |
| Sound | Jacek Tarkowski | ADR Recordist |
| Sound | Maciej Pawłowski | Dialogue Editor |
| Sound | Łukasz Świerzawski | Sound Designer |
| Sound | Łukasz Świerzawski | Sound Effects Editor |
| Production | Marta Pasławska | Producer's Assistant |
| Editing | Jarosław Barzan | Editorial Coordinator |
| Sound | Przemysław Kamieński | Sound |
| Art | Marek Warszewski | Art Direction |
| Directing | Patrick Yoka | Director |
| Production | Tomasz Blachnicki | Producer |
| Production | Przemysław Malec | Production Coordinator |
| Sound | Maciej Pawłowski | Sound |
| Art | Janusz Bieniek | Title Designer |
