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 Ein Fall für TKKG: Drachenauge is not yet available on HBO Max.
| Directing | Ulrich König | Director |
| Writing | Inka-Maria Kalmuczak | Screenplay |
| Production | Bernd Eichinger | Producer |
| Production | Sabine Eichinger | Line Producer |
| Production | Robert Kulzer | Associate Producer |
| Production | Dieter Meyer | Line Producer |
| Production | Peter Zenk | Executive Producer |
| Production | Martin Moszkowicz | Executive Producer |
| Sound | Bernie Paul | Original Music Composer |
| Sound | Fritz Muschler | Original Music Composer |
| Camera | Leander R. Loosen | Director of Photography |
| Editing | Hannes Nikel | Editor |
| Art | Matthias Kammermeier | Production Design |
| Costume & Make-Up | Rosie Jurat | Costume Design |
| Production | Patrick Zorer | Unit Manager |
| Production | Sabine Eichinger | Production Manager |
| Sound | Andreas Schneider | Foley Artist |
| Sound | Joo Fürst | Foley Artist |
| Lighting | Bernhard Fuss | Lighting Technician |
| Camera | Dorothea Koerner | Assistant Camera |
| Production | Edward Erdmann | Production Runner |
| Crew | Marc-Thomas Pohl | Set Production Assistant |
| Production | Renate Seefeldt | Production Accountant |
| Production | Balthasar von Weymarn | Production Runner |
| Sound | Frank Zander | Original Music Composer |
| Writing | Rolf Kalmuczak | Book |
