The four young snoopers Tim, Karl, Kloesschen and Gaby by chance discover a hidden cave near an old castle. In it there's a board that seems to describe the way to a legendary sword. They ask their history teacher Schindler about it. He forbids them further actions, but secretly continues investigations with help of two ruthless criminals. But our young heros don't give up on an adventure so fast...
Unfortunately the movie Four Junior Detectives is not yet available on HBO Max.
| Writing | Inka-Maria Kalmuczak | Screenplay |
| Directing | Ulrich König | Director |
| Sound | Bernie Paul | Original Music Composer |
| Lighting | Bernhard Fuss | Lighting Technician |
| Production | Edward Erdmann | Production Runner |
| Production | Sabine Eichinger | Line Producer |
| Production | Balthasar von Weymarn | Production Runner |
| Production | Sabine Eichinger | Production Manager |
| Crew | Marc-Thomas Pohl | Set Production Assistant |
| Production | Martin Moszkowicz | Executive Producer |
| Art | Matthias Kammermeier | Production Design |
| Sound | Fritz Muschler | Original Music Composer |
| Editing | Hannes Nikel | Editor |
| Production | Patrick Zorer | Unit Manager |
| Sound | Joo Fürst | Foley Artist |
| Production | Dieter Meyer | Line Producer |
| Production | Peter Zenk | Executive Producer |
| Production | Bernd Eichinger | Producer |
| Production | Renate Seefeldt | Production Accountant |
| Camera | Leander R. Loosen | Director of Photography |
| Writing | Rolf Kalmuczak | Book |
| Camera | Dorothea Koerner | Assistant Camera |
| Production | Robert Kulzer | Associate Producer |
| Costume & Make-Up | Rosie Jurat | Costume Design |
| Sound | Andreas Schneider | Foley Artist |
| Sound | Frank Zander | Original Music Composer |
