A warship returning from a training exercise was tasked with apprehending an unknown schooner that had violated GDR territorial waters. Although nothing illegal was found during the search of the ship, the ship's commander Fischer was suspicious of the owner of the schooner, Arendt, a former lieutenant of a Nazi coastal battery. Fischer's doubts were confirmed when a diver came aboard the schooner and photographed a military object underwater. The investigation showed that the detained schooner was on a sabotage mission, and the "activities" of Arendt, a former Gestapo Obersturmführer, were also revealed.
Unfortunately the movie Im Sonderauftrag is not yet available on Disney Plus.
| Directing | Heinz Thiel | Director |
| Writing | Hans Oliva-Hagen | Writer |
| Editing | Wally Gurschke | Editor |
| Writing | Heinz Thiel | Writer |
| Sound | Helmut Nier | Music |
| Art | Alfred Hirschmeier | Production Design |
| Sound | Bernd Gerwien | Sound |
| Camera | Horst E. Brandt | Director of Photography |
| Costume & Make-Up | Joachim Dittrich | Costume Design |