Season 51

State of emergency in North Rhine-Westphalia! Four inspectors from different departments have already been killed. There has never been a comparable series of murders in the history of the state. But a hot lead is missing, the investigators are groping in the dark - and the pressure is increasing ... Finally stopping those behind the insidious murders - this is the common goal that investigators from different cities are to swear to: All of them have been in contact with the previous victims. Peter Faber and Martina Bönisch from the Dortmund homicide squad and their colleague Nadeshda Krusenstern from Münster are there. The investigation team also includes Inspector Rettenbach from Oberhausen and Inspector Mitschowski from Aachen. Inspector Ziesing is joining them from the Paderborn criminal investigation department, and Inspector Möller is coming from Düsseldorf.

Ballauf and Schenk investigate the murder of a 17-year-old student. [Köln]

A murderer remains at the scene of the crime and demands to speak with Peter Faber.

Falke and Grosz investigate a murder in Hamburg's red light district.

Babs Sprenger, a successful businesswoman who lives alone in a spacious apartment in Fürth, was active on various dating sites under an assumed name until a few months ago. She celebrated her birthday alone with her colleague Theresa Hein. The next day, Babs Sprenger was dead. Stabbed with a sushi knife that the police found in the dishwasher, thoroughly cleaned. The knife was Theresa's gift to Babs. How did it become a deadly weapon? What happened that evening? Even after Theresa's confession, the question of why remains unanswered. Voss and Ringelhahn suspect that the truth lies much deeper. What could Theresa be hiding?

A secret society of law students exercise strange control over a new member.