Season 4

Mick has quit the police force and is living in a cabin in the woods. His colleagues miss him, especially Andreas, who has to deal with Mick's nerdy successor. But Mick has no intention of returning.

Three fully loaded delivery vehicles are stolen. During his investigation, detective Jan Schreck is killed: an unknown perpetrator drives a nine-centimeter-long nail into the private investigator's heart – with a pneumatic nailer.

The bon vivant Sascha König is shot dead in a car repair shop.

An explosive device detonates at a bus stop in a suburb of Essen.

After a scuffle with a local resident, homeless man Benno falls to the ground in a playground and is dead. Thanks to Meisner, Mick and Andreas quickly discover that Benno was killed with rat poison and did not die from the fall.

Mick and Andreas discover a body in a burned-out car wreck. It is Greta Gerlach, the ex-wife of a construction magnate, at whose wedding Greta had drunk plenty of champagne and then taken a nap in her parked car.

Spending your last hours in a temple of love – for some, a wonderful idea. For tax officer Martin Trabert, it's a nightmare. He doesn't die in the arms of a beautiful woman, but is roasted in a sauna.

Young police officer Silke Dresbach, who was determined to be the first woman to join Essen's special task force, was murdered at the Essen Police Academy. Did “conservative forces” at the academy want to prevent Silke from taking this career step?

During a bank robbery in Essen, a young employee is shot and Mick's daughter Isa is taken hostage. In a daring solo effort, Mick manages to free Isa from the getaway car before the bank robber speeds away unrecognized.

In a coal mine, 1,000 meters underground, miner Horst Lubczeck has been found dead, killed violently. Mick and Andreas make a discovery that gives them pause: in the pocket of Horst Lubczeck's miner's uniform, they find a gold nugget!

Uschi wakes up in a strange apartment with no memory of what happened. Next to her lies her landlord Wilhelm Inck, beaten to death in a huge pool of blood. Mick and Andreas have no choice but to arrest their old friend Uschi.

Mick notices a young woman, Annika, sitting huddled and distraught in front of the police headquarters. She claims to have killed her mother. Shortly afterwards, Mick and Andreas are in Annika's apartment. There is no sign of a body!

Carsten Wiechert is found dead in his apartment. Mick and Andreas quickly discover that Wiechert always came home in the middle of the night, even though the inn where he worked closed its doors much earlier.