The mermaid Undine is looking for a man who is worthy of her love.
| Actor | Role |
|---|---|
| AAngela von RadloffUndine | Undine |
| IIngo ThouretHans | Hans |
| GGundy GrandBerta | Berta |
 Elisabeth FlickenschildtAja | Aja |
 Werner PochathRocker | Rocker |
 Herbert FuxHotelangestellter | Hotelangestellter |
| KKurt HeintelNot listed | Not listed |
| HHeidrun HammerdingerNot listed | Not listed |