Screenwriter Thijs Römer is the grandson of actor Piet Römer who played Jurre de Cock in the television series Baantjer (1995)
All canal shots are filmed in Leiden and not in Amsterdam.
In the final shot, as de Cock exits the cafe, the trademark hat that Piet Römer wore as Jurre de Cock in Baantjer (1995) can be seen hanging on the coat rack.