Köln. A dead retiree in the park puzzles detectives Ballauf and Schenk.

Eisner and Fellner investigate a bus driver's murder.

Inspector Frank Thiel and forensic pathologist Prof. Karl-Friedrich Boerne are investigating the case of a former female criminal investigation officer who was found dead in the street – wearing only panties. Boerne found no signs of violence on the woman's body. [Münster]

After three bodies are found in a shipping container, Eisner and Fellner face off against the Chinese mafia.

Köln. The body of a young man is found in an old military bunker.

A desperate call alerted the Kiel police emergency number: "He's in my apartment. He just comes through the wall." But for Carmen Kessler, any help comes too late. The young woman is found brutally murdered in her apartment.

A wedding party puts detectives Lursen and Stedefreund at the center of their next investigation.

Faber and his team investigate a possible serial murder.

The Kiel author Dirk Sauerland is found dead on his yacht. Sauerland was known beyond the borders of Kiel. In recent months he had been working on a spectacular disclosure story.

Faber investigates the death of a local pimp and drug dealer who was the right-hand man of a shady businessman.

A murdered naturopath leads Thiel and Boerne into the world of alternative medicine. [Münster]

The body of a 16-year-old girl turns up in an incineration plant.

Charlotte finds herself in high society circles as she investigates the murder of a young girl.