Filming has started for the six-part VPRO drama series *Koning van de Wallen*. The series is based on the life of Maurits de Vries, alias Zwarte Joop, who built a sex and gambling empire in Amsterdam's Red Light District between 1940 and 1980. Gijs Naber, Thekla Reuten, and Holly Mae Brood play the lead roles. Tim Oliehoek is directing; the script is by Michael Leendertse and Sarah Offringa. The series blends facts with fiction and is not a historical reconstruction. It is a co-production of Lemming Film, Nukleus Film, and the VPRO. The series will be released on NPO Start in 2028.