This summer, Pumuckl and Eder have a lot going on: a turtle, a trip to the countryside and then neighbor Burke's birthday! Perhaps too much - because with so many events going on, the two of them are barely able to maintain their friendship. And when a big misunderstanding arises, everything changes between Eder and Pumuckl...
| Actor | Role |
|---|---|
 Florian BrücknerFlorian Eder | Florian Eder |
 Maximilian SchafrothPumuckl (voice) | Pumuckl (voice) |
 Matthias BundschuhLothar Hermann Burke | Lothar Hermann Burke |
 Robert PalfraderNot listed | Not listed |
 Stella GoritzkiTessa Brunner | Tessa Brunner |
 David ZimmerschiedSilvio | Silvio |
 Mira HuberMartina | Martina |
 Moritz KatzmairMader | Mader |
 Ferdinand HoferGeorg | Georg |
 Jakob SchmidtMr. Rieger | Mr. Rieger |
| FFranziska WanningerNot listed | Not listed |
 Rainer HausteinPorter | Porter |
 Frederic LinkemannNot listed | Not listed |
 Ilse NeubauerNot listed | Not listed |
 Gisela SchneebergerNot listed | Not listed |