Commissaris Piet Van der Valk (Marc Warren) and the team return for a fourth season with three vibrant and daring new investigations set in and around Amsterdam. Authors: Chris Murray, Maria Ward and Nicolas Freeling. Directors: Michiel Van Jaarsveld, Eche Janga and Paula Van Der Oest. Arctors: Marc Warren, Maimie McCoy, Azan Ahmed, Darrell D'Silva and Emma Fielding.