An engineer and his 5-year old son Rasmus are kidnapped by a group who wants to get their hands on the engineer's latest invention. Three kids become witnesses to the kidnapping and decide to follow the kidnappers to an island and attempt to make a rescue.
Unfortunately the movie Kalle Blomkvist and Rasmus is not yet available on HBO Max.
| Writing | Astrid Lindgren | Novel |
| Directing | Göran Carmback | Director |
| Writing | Göran Carmback | Screenplay |
| Production | Waldemar Bergendahl | Producer |
| Sound | Peter Grönvall | Original Music Composer |
| Art | Olle Remaeus | Production Design |
| Editing | Dominika Daubenbüchel | Editor |
| Sound | Christer Furubrand | Sound Engineer |
| Sound | Lars Jameson | Sound Engineer |
| Crew | Kimmo Rajala | Stunt Coordinator |
| Crew | Anna Idman | Script |
| Production | Maria Bolme | Casting |
| Production | Lena Ringqvist | Casting |
| Crew | Fred Nordström | Second Unit Cinematographer |
| Camera | Carl Sundberg | Director of Photography |
