Alarm fur Cobra 11 Die Autobahnpolizei season 12

While chasing a carjacker through a forest, Tom & Semir find the dead body of a middle-aged, brown-haired woman. Ashes are found on her, and a profiler links the case to a serial killer, who stopped killing some years ago, but was never caught. Further investigation leads to an online flirting site, where the killer is active under the nickname "Gemini". Soon, another woman is strangled by him. Anna Engelhardt decides to act as a decoy, in order to lure the killer into a restaurant. The plan goes wrong, and Anna finds herself in great danger.

A group of criminals robs a bonded warehouse and escapes in two vans. Semir is able to stop one of them, but is soon disarmed by one of the robbers. Before the man can execute him, his accomplice rescues Semir. Semir is a bit confused, since he has to hunt down and identify the man who just saved his live. His "guardian angel" Falk is a professional criminal, who acts a bit arrogant towards his narrow-minded and brutal men, since he has earned the respect of Hansen, the gang leader. But soon, the group's hierarchy is changed, when Hansen is murdered by Möller, one of his own men.

When a truckload of vintage sports cars is stolen in front of their eyes, Tom and Semir start to investigate against a gang of car thieves, who seem to complete a list of exotic cars for their client. The cops ask former prisoner Sven Racke to work undercover for them. The plan goes wrong, because Sven knows one of the gangsters. Semir and Tom lose him, but they know where the thieves will strike next: To complete the list, they need a Formula One race car.

Semir has to work together with undercover detective Chris in order to bring down the human trafficking organization of Roman Gehlen and his son Erik, who killed Tom in cold blood.

A building engineer is killed by a car right in front of Semir's eyes at a gas station. Chris and Semir have to investigate the case although there are tensions between the new partners.

Chris is confronted with his past: The Belgian arms dealer Lemercier, who was believed to be dead returns. Lemercier was an undercover detective just like Chris, but he changed sides and betrayed Chris, leaving him captured and tortured in Chad. Semir has to look after Chris, who wants revenge.

Semir and Chris investigate against drug squad detective Achim Zager, who apparently killed two drug dealers and collected the drug money.

After a routine traffic control, a suspect escapes to a nearby farmhouse, taking a hostage. The SEK (German SWAT) arrives to rescue the hostage. Although the criminal is disarmed and captured, he is killed by SEK officer Rolf Dorn. A dispute between Chris and Semir starts, because Chris knows Dorn for a long time, but Semir is sure that Dorn and his men are involved in illegal activities.

Chris and Semir have to protect prosecutor Dr. Michael Färber, who is endangered. To provide constant security, the police has to find out when and where the assassin will strike.

Chris and Semir work together with LKA detective Verena Maurer and her team to catch Roman Zysen, who deals with stolen sports cars. The situation becomes critical, when Anna Engelhardt shoots Zysen's wife Irina during a gunfight.

Together with customs detective Alexander Hofmann, Chris and Semir stop a truck on the Autobahn. The truck contains a huge amount of counterfeit money hidden in the false bottom of the container. During the investigation, Hofmann soon acts suspicious.