Lion Wasczyk and Gerrit Klein played the same role Jack Leopold on Hotel 13 (2014). They worked on this series but not together.
Jessica Ginkel (Karin Noschke) quit the show to focus on her family [February, 2019].
Although filmed in 2007, the first season didn't air until 2009.
Hendrik Duryn quit the show after the 4th episode of season 9. [January 28 2021]