During a summer holiday, two boys discover an anti-gravity cannon in an old attic.
| Actor | Role |
|---|---|
 Mario MirkovićMiro | Miro |
| JJiří GuryčaPepek | Pepek |
| NNina PetrovićBožena | Božena |
 Rene BitorajacAdam | Adam |
 Špiro GuberinaMarko Pivac | Marko Pivac |
 Boris DvornikŠime | Šime |
| PPetar JelaskaToma | Toma |
 Jan KanyzaAristotel Holm | Aristotel Holm |
 Miloš KopeckýBoss | Boss |
 Mia OremovićTetka Lucija | Tetka Lucija |
 Edo PeročevićInspektor | Inspektor |
 Antun NalisTonči | Tonči |
| KKsenija UrličićTV voditeljica | TV voditeljica |
| IIvo MarjanovićPredsjednik turističke zajednice | Predsjednik turističke zajednice |
| FFrane JurićNot listed | Not listed |
| ZZlatko MartinčevićNot listed | Not listed |
| VVinko VarvodićNot listed | Not listed |
| TTomislav GotovacNot listed | Not listed |
| VVladimir GačinaNot listed | Not listed |
| DDanilo PoprženNot listed | Not listed |
| BBruno TerbovcNot listed | Not listed |
| MMiroslav BuhinNot listed | Not listed |
| MMiko ZaninovićNot listed | Not listed |
| ŽŽivojin SkočićNot listed | Not listed |
| TTonči BanovNot listed | Not listed |
| DDragan SučićNot listed | Not listed |
| IIvo KrištofMornar s Barracude | Mornar s Barracude |
| AAntuno BanovNot listed | Not listed |