Svein's best friend is a fancy rat named Halvorsen who goes missing during a pet contest, leading to chaos with newspapers reporting a rat invasion. To avoid losing both Halvorsen and the competition, Svein must work to keep his parents unaware of the situation.
| Writing | Siv Rajendram Eliassen | Writer |
| Directing | Magnus Martens | Director |
| Writing | Marit Nicolaysen | Novel |
| Writing | Kristin Ulseth | Writer |
| Production | Dag Alveberg | Producer |
| Production | Knud Bjørne-Larsen | Co-Producer |
| Production | Nina B. Andersson Figenschow | Line Producer |
| Production | Kristin Ulseth | Development Producer |
| Sound | Stein Berge Svendsen | Original Music Composer |
| Camera | Marius Johansen Hansen | Director of Photography |
| Editing | Kirsti Marie Hougen | Editor |
| Production | Celine Engebrigtsen | Casting |
| Art | Eli Bø | Production Design |
| Art | Merete Boström | Art Direction |
| Art | Tom Gammelsrød | Set Decoration |
| Costume & Make-Up | Ingvild Eiring | Costume Design |
| Costume & Make-Up | Therese Gaarde | Assistant Makeup Artist |
| Costume & Make-Up | Aase Lund | Makeup Artist |
| Production | Marie Susanne Bøhmer | Production Manager |
| Directing | Ida Øversveen Gabrielsen | Assistant Director |
| Directing | Binne Thoresen | Assistant Director |
| Art | Christine Bozenski | Property Master |
| Crew | Bjørn Grønnerud | Carpenter |
| Art | Hans Gunnarson | Construction Manager |
| Crew | Lars Erik Gurholt | Carpenter |
| Art | André Henriksen | Assistant Decorator |
| Crew | Rolf Kise | Carpenter |
| Crew | Kristian Lie | Carpenter |
| Art | Anders Lunde | Property Master |
| Crew | Geir Opheim | Carpenter |
| Art | Karen Søndrol | Assistant Decorator |
| Sound | Ingar Asdahl | Sound Editor |
| Sound | Peter Clausen | Sound Recordist |
| Sound | Gunn Tove Grønsberg | Sound Editor |
| Sound | Geir Hoseth | Boom Operator |
| Sound | Gunnar Meidell | Foley Recordist |
| Sound | Christian Schaanning | Sound Effects Editor |
| Sound | Gisle Tveito | Sound |
| Sound | Erik S. Watland | Foley Artist |
| Sound | Nick Watson | Dolby Consultant |
| Editing | Mats Holmgren | Digital Colorist |
| Visual Effects | James Hunt | Animation |
| Visual Effects | Fredrik Höglin | Digital Compositor |
| Visual Effects | Morten Kjær Jensen | Animation |
| Visual Effects | Thomas Borch Nielsen | Visual Effects Producer |
| Visual Effects | Daniel Silwerfeldt | Visual Effects Supervisor |
| Visual Effects | Daniel Thuresson | Digital Compositor |
| Visual Effects | Tonni Zinck | 3D Supervisor |
| Crew | Ota Bares | Animal Wrangler |
| Crew | Radim Macha | Animal Wrangler |
| Production | Michael Pfleghar | Production Assistant |
| Production | Eirin Høgetveit | Production Assistant |
| Production | Thor Arne Bergset | Production Assistant |
| Production | Ann-Kristin Lian | Production Secretary |
| Production | Tove A. Mar | Production Accountant |
| Lighting | Jon Arne Bakker | Lighting Technician |
| Camera | Jan Benkholt | Camera Operator |
| Camera | Philip J. Borgli | Second Assistant Camera |
| Lighting | Iver Bostad | Electrician |
| Camera | Charles Curran | First Assistant Camera |
| Camera | Virre Dahl | Still Photographer |
| Lighting | Karsten Heidar | Electrician |
| Lighting | Rune Kalgraff | Electrician |
| Camera | Viggo Knudsen | First Assistant Camera |
| Camera | Anders Leegaard | First Assistant Camera |
| Camera | Odd Reinhardt Nicolaysen | Second Unit Director of Photography |
| Lighting | Henning Røkke | Electrician |
| Lighting | Terje Røkke | Gaffer |
| Camera | Pål Tohje | Grip |
| Camera | Endre Eken Torp | First Assistant Camera |
| Costume & Make-Up | Elin Langhoff | Set Costumer |
| Production | Kristin Emblem | Production Coordinator |
| Editing | Sophie Hesselberg | Additional Editor |
| Editing | Andrzej Kiwala | Color Timer |
| Editing | Tomas Kværner | Assistant Editor |
| Editing | Veslemøy Blokhus Langvik | Additional Editor |
| Art | Jørgen Stangebye Larsen | Location Scout |
| Production | Karl Kristian Meidell | Assistant Location Manager |
| Directing | Therese Messel | Script Supervisor |
| Writing | Kristin Ulseth | Script Editor |
