Season 1 NPO 1 , 2016 Watch now Not only hostages, murderers, drugs deals and kidnappings are daily tasks for the investigation team and prosecutor. It seems like there is a mole within their ranks, which proofs to be a worthy opponent. Season 2 NPO 1 , 2017 Watch now Season 3 NPO 1 , 2018 Watch now Season 4 NPO 1 , 2019 Watch now Season 5 NPO 1 , 2021 Watch now Season 6 NPO 1 , 2022 Watch now Season 7 NPO 1 , 2023 Watch now