A boy explores the hidden depths of his bathtub in a grey world dominated by boring adults.
| Actor | Role |
|---|---|
 Bo JakobsenBenny (voice) | Benny (voice) |
 Jesper KleinTadpole (voice) | Tadpole (voice) |
 Peter BelliOctopus (voice) | Octopus (voice) |
 Jytte AbildstrømDagny (voice) | Dagny (voice) |
 Otto BrandenburgLobster Boy (voice) | Lobster Boy (voice) |
| JJytte Hauch-FausbøllBenny's Mother (voice) | Benny's Mother (voice) |
| RRolf KroghOrnithologist (voice) | Ornithologist (voice) |
 Povl DissingFirst Pirate (voice) | First Pirate (voice) |
 Per Bentzon GoldschmidtSecond Pirate (voice) | Second Pirate (voice) |
| PPer Tønnes NielsenCowboy (voice) | Cowboy (voice) |
| AAyaMermaid (voice) | Mermaid (voice) |
| MMaia ÅrskovMermaid (voice) | Mermaid (voice) |
 TrilleMermaid (voice) | Mermaid (voice) |
| CChristian SievertCrab (voice) | Crab (voice) |
| AAllan BotschinskySeahorse (voice) | Seahorse (voice) |