It is the seventh movie of the film series but the ninth book of the book series.
Final film for Joker (the Picardy Shepherd dog) who played the canine character, Ludwig. He passed away on 28 June 2021 due to the internal bleeding caused by splenic tumors.
The release of the movie was originally planned for August 2020 but because of the COVID-19 pandemic in Germany and its negative influence for Cinema-visitors in Germany, producers decided that the release will be postponed until further notice. In autumn 2020 it was announced to be released soon.
335.978 visitors in the opening week.
It is based on the novel of "Rita Falk"