Emilia is een kind van gescheiden ouders dat in Helsinki woont. Haar leven is doodgewoon; ze gaat naar school, verblijft af en toe bij haar vader en dan weer bij haar moeder. Op een dag wordt ze gebeten door haar cavia, waarna ze ineens kan veranderen in een wollige superheld, die kan vliegen en problemen oplossen. De haringen in de Finse Golf schreeuwen om hulp, omdat hun wateren vergiftigd worden. Emilia gaat ze helpen.
Nee, helaas is Supermarsu nog niet beschikbaar op Netflix in Nederland.
| Art | Toni Kari | Production Design |
| Sound | Sami Sarhamaa | Sound Re-Recording Mixer |
| Costume & Make-Up | Anna Vilppunen | Costume Design |
| Costume & Make-Up | Laura Rantaniemi | Makeup Designer |
| Sound | Juha Hakanen | Sound Designer |
| Editing | Jyrki Levä | Editor |
| Camera | Jani Kumpulainen | Director of Photography |
| Production | Sami Nikki | Co-Producer |
| Production | Ville Rousu | Co-Producer |
| Production | Marko Talli | Producer |
| Production | Olli Haikka | Executive Producer |
| Production | Jorma Reinilä | Executive Producer |
| Production | Minna Sorvoja | Casting |
| Sound | Panu Aaltio | Original Music Composer |
| Production | Minna Virkajärvi | Production Manager |
| Lighting | Henry Wacklin | Gaffer |
| Camera | Nea Salminen | First Assistant Camera |
| Lighting | Jyrimatti Holm | Lighting Technician |
| Lighting | Toni Haaranen | Lighting Technician |
| Writing | Paula Noronen | Book |
| Directing | Joona Mielonen | First Assistant Director |
| Directing | Melissa Markki | Second Assistant Director |
| Camera | Antris Bonsdorff | Second Assistant Camera |
| Camera | Elina Eränen | Second Assistant Camera |
| Camera | Valpuri Lindberg | Second Assistant Camera |
| Directing | Helena Ketonen | Script Supervisor |
| Lighting | Jari Kairamo | Lighting Technician |
| Camera | Olli Kukkonen | Key Grip |
| Sound | Juha Hakanen | Production Sound Mixer |
| Sound | Antti Onkila | Production Sound Mixer |
| Sound | Santtu Sierilä | Boom Operator |
| Camera | Hannu-Pekka Vitikainen | Second Unit Director of Photography |
| Editing | Pasi Mäkelä | Colorist |
| Directing | Joona Tena | Director |
| Writing | Paula Noronen | Screenplay |
| Writing | Joona Tena | Screenplay |
| Crew | Reijo Kontio | Stunt Coordinator |
| Production | Otto Lume | Location Manager |
| Production | Pauli Kairismaa | Location Manager |
| Visual Effects | Zero Tuonela | Animation Director |
| Visual Effects | Sami Nikki | Animation Director |
| Visual Effects | Mikko Heiskanen | Animation |
| Visual Effects | Antti Lempinen | Animation |
| Visual Effects | Tuomas Tulijoki | Animation |
| Visual Effects | Tero Mattila | Animation |
