Dunderklumpen lives all alone in the mountains of Jämtland. One Midsummer's Eve when he feels very lonely he sets off on a journey to find friends.
Unfortunately the movie Thunderclump is not yet available on HBO Max.
| Directing | Per Åhlin | Director |
| Editing | Per Åhlin | Editor |
| Sound | Lars Klettner | Sound Effects Editor |
| Production | Gunnar Karlsson | Producer |
| Sound | Lars Klettner | Production Sound Mixer |
| Visual Effects | Kjeld Simonsen | Animation |
| Visual Effects | Ib Steinaa | Animation |
| Art | Michaela Halvegård | Painter |
| Visual Effects | Per Svensson | Animation |
| Art | Esther Eckstein | Painter |
| Art | Anna-Lena Fries | Painter |
| Art | Annbritt Kaptein | Painter |
| Art | Tony Pahlborn | Painter |
| Art | Inger Torstensdotter | Painter |
| Visual Effects | Birgitta Jansson | Animation |
| Art | Saskia Ackema | Painter |
| Visual Effects | Hans Åke Gabrielsson | Animation |
| Art | Christina Svensson | Painter |
| Sound | Toots Thielemans | Music |
| Art | Gullmaj Persson | Painter |
| Art | Karin Schmidt | Painter |
| Camera | Lennart Carlsson | Director of Photography |
| Camera | Per Svensson | Director of Photography |
| Visual Effects | Tibor Belay | Animation |
| Sound | Jörgen Hasselblad | Foley |
| Sound | Claes Rosendahl | Music Supervisor |
| Art | Marie Torstensdotter | Painter |
| Writing | Beppe Wolgers | Screenplay |
| Visual Effects | Per Åhlin | Animation |
| Camera | Lennart Carlsson | Still Photographer |
| Sound | Björn Almstedt | Sound |
| Sound | Sven Fahlén | Sound |
| Sound | Jan-Erik Lundberg | Sound |
