Not a single word is spoken or heard in 'Gangster Killer', except on a written piece of paper that tells the Victim to wake up and look outside.
The hook from 'Triple Hooked' is a toy that Arjen Rooseboom used in elementary school during carnival when playing Captain Hook.
In 'Going Crazy', Detective Ripman dances to a ballad of Frans Bauer. The song was at number 1 in the national charts at that time.
The character Jan Peter B from 'Klappen Kopen' is a parody to Jan Peter Balkenende, a former prime minister of the Netherlands from 2002-2010.
The sign language between Jeffrey van Veen and Koen van der Donk in 'Doof' was improvised on the spot. None of the signs actually exists.