How many movies have Biber Gullatz and Sven Burgemeister collaborated on?

They have worked on 4 movies together! Their first movie together was Und dennoch lieben wir (2011) while their highest rated movie together was Schwarzach 23 - Und die Hand des Todes (2015). They have not worked together since Schwarzach 23 - und das mörderische Ich (2020).