How many movies have Egon Riedel and Gerhard Schirlo collaborated on?

They have worked on 8 movies together! Their first movie together was Biikenbrennen - Der Fluch des Meeres (1999) while their highest rated movie together was Jack the Ripper: The London Slasher (2016). They have not worked together since Jack the Ripper: The London Slasher (2016).