The series is created and written by Elsebeth Egholm and Stefan Jaworski, with various other screenwriters helping out as episode writers, among them Siv Rajendram, Rikke De Fine Licht and Morten Dragsted.

TV2 programming manager Keld Reinicke stated that, "We have no plans to continue the series as it never gave us the audience share we expected in Denmark".

[3] Announced in April 2018, Those Who Kill returned to the screens in 2019 on the Viaplay streaming service and the TV3 network across Scandinavia, with a new separate season which starred Kenneth M Christensen and Natalie Madueño.

The pilot starred Chloë Sevigny as police detective Catherine Jensen, and James D'Arcy as forensic profiler Thomas Schaeffer.

[20] A&E pulled the series after poor opening ratings plunged even more for the second episode, then moved it to Lifetime Movie Network (LMN), where it was not renewed for a second season.