SkyShowtime has announced the eight-part crime series Koud, a spin-off of Onopgelost that will premiere exclusively early next year. The series follows forensic psychology professor Frederik Plantyn (Jelle De Beule), who investigates unsolved crimes with his students, with the case taking a dark turn when the mutilated body of Kristine Polet, who has been missing for years, is found. Plantyn investigated this case himself at the time and is forced to work with detective Esther de Graaf (Anna Drijver). The series is directed by Thomas Korthals Altes and André van Duren, written by Philip Delmaar, Karin van der Meer, and Rik D'Hiet, and produced by Chantal van der Horst for Eleven.