Based on an original idea by best-selling Danish novelist Elsebeth Egholm, the series follows the inquiries of a special unit at Copenhagen's police force, consisting of detective inspector Katrina Ries Jensen and forensic psychiatrist Thomas Schaeffer. The pair specialise in serial killers that do not fit within traditional behavioural patterns.

Laura Bachas Katrine Ries Jensen
Jakob Cedergrenas Thomas Schaeffer
Lars Mikkelsenas Magnus Bisgaard
Frederik Meldal Nørgaardas Stig Molbeck
Lærke Wintheras Mia Vogelsang
Iben Dorneras Benedicte Schaeffer
Kim Bodniaas Jakov
Peter Hesse Overgaardas Frederik Herning
Sune Nørgaardas Fange
Elsebeth Egholm
Stefan Jaworski
Siv Rajendram Eliassen
Rikke De Fine Licht
Morten Dragsted
Torleif Hoppe
Per Daumiller
Karina Dam
Frans Bak