This time, they travel on holiday with Aunt Thea to Summer Island. There they meet Eddy who is an expert on all the challenges they can face on a magical island. It is rumored that a sea worm has been observed in the fjord, and it will not be long before the energetic sea worm expert Blegen shows up, with his strange devices and instruments. It will be an exciting summer holiday with friendship put to the test, exploration in nature and the hunt for the mysterious sea worm.
| Production | Finn Gjerdrum | Producer |
| Production | Stein B. Kvae | Producer |
| Editing | Margrete Vinnem | Editor |
| Directing | Tove Undheim | Director |
| Sound | Erik Johannessen | Music |
| Sound | Erlend Mokkelbost | Music |
| Writing | Anne-Cath. Vestly | Book |
| Camera | Łukasz Zamaro | Director of Photography |
| Writing | Tove Undheim | Writer |
| Writing | Lars Kilevold | Story |
| Writing | Aksel Kielland | Writer |
| Production | Jan Petter Dickman | Executive Producer |
| Production | Erik Poppe | Executive Producer |
| Production | Finn Gjerdrum | Executive Producer |
| Production | Stein B. Kvae | Executive Producer |
| Production | Nicholas Sando | Line Producer |
| Art | Åsa Nilsson | Production Design |
| Sound | Fredric Vogel | Sound Designer |
| Production | Mia Jensen | Casting |
| Costume & Make-Up | Grethe Gunn Solberg Hansen | Makeup Artist |
| Costume & Make-Up | Miriam Lien | Costume Design |
| Costume & Make-Up | Isabella Leikanger Mork | Costume Design |