The fourth and final Department Q film The Purity Of Vengeance has become the highest-grossing Danish film at the local box office. It has sold 760,000 tickets to date. As in the previous films, the lead duo comprises Nikolaj Lie Kaas as Criminal Commissioner Carl Mørck and Fares Fares as his assistant Assad, both of Department Q.

The cast also includes Fanny Leander Bornedal, Nicolas Bro and Vibeke Hastrup. The Purity of Vengeance is produced by Zentropa producer Louise Vesth, and directed by Christoffer Boe from a screenplay by Bo Hr. Hansen, Nikolaj Arcel and Mikkel Nørgaard.