During the Dating Scene in the cinema, the movie Frank and Marlene are watching is "Tartarus", the second film Stefan Müller directed back in 2010.
"Marlene" is the first film since "Jenseits" ( 2006 ) where director Stefan Müller takes on a lead role in one of his own films. In "Marlene" he plays one of the main villains, "Amon".
Paul Hassler did all of his own stunts in the movie.
During the Escape of the Barkeeper, the Poster for "BIEST", Stefan Müller's third film from 2014 can be spotted at the door.