The hunt for the past turns out to be a trip full of surprises, including Ben's ambitious ex-girlfriend Katrin...

Little Felix causes an accident because he draws a picture of the solar system on the highway. Ben and Semir take care of the boy and discover that his mother has been the victim of a crime. What happened? Felix has turned into

At the university's history department, a professor is shot dead during a robbery and part of a valuable treasure map is stolen. The murder investigation brings Ben face to face with his ex-girlfriend Katrin.

Ben is certain that he witnessed a murder in the building opposite his apartment, but no one believes him. In his search for evidence, he becomes increasingly entangled in a murderous conspiracy.
 

The dangerous criminal Wolf Mahler has escaped from prison and wants revenge on Ben, whom he believes is responsible for his daughter's death. He kidnaps Ben and buries him alive. For Semir, a race against time begins.

Ben and Semir suspect that a professional hitman has been hired to kill businessman Kurban Said. After a failed assassination attempt, the police discover that they have apparently been following the wrong lead the entire time.
 

Ben and Semir are shot at in their patrol car. However, the attack was intended for a young VIP hostess. When Ben's great love, prosecutor Saskia Ehrbach, is murdered, the police officers must overcome their first crisis as colleagues.

By jumping off a bridge, laundromat operator Tarik causes an accident. Ben and Semir discover that the apparent suicide was actually a cold-blooded murder. They track down a gang of protection racketeers.
 

Highway patrolman Ben unsuspectingly stumbles upon a hostage situation at watchmaker Jörg Bauer's shop. But the supposed robbery turns out to be an old score that the gangster has to settle with Bauer.

When Ben goes to a jewelry store to have his watch repaired, he finds himself in the middle of a robbery with hostages. During the investigation, Semir and Ben realize that a complicated family tragedy is behind the crime.

Years ago, Ben and Semir's boss Anna Engelhardt had an affair with the head of a police academy. Now the past is catching up with her, and the two men's paths cross in dramatic fashion.

After Chris Ritter's death, Semir gets a new partner: Ben Jäger, a young, daring guy for whom the highway police is just a stepping stone. Can Semir rely on him?
 

Fourteen-year-old Mario doesn't trust his mother's new boyfriend. He thinks he saw him with a gun. After an accident, Ben and Semir get to know the boy and take a closer look at his family.