About a man who, in his own words, is not Sherlock Holmes - but a scientist.
On the campus of the University of Cologne, student Diana is brutally raped, but her memory of the incident is initially wiped out.
During a carnival celebration, Marc Leyendecker, who is already heavily intoxicated, witnesses his wife Johanna being murdered at home on the phone. At the scene of the crime, police officers Anneliese Deckert and Daniel Winter are confronted with a gruesome sight. The perpetrator stabbed the school inspector multiple times with a kitchen knife.
Plastic surgeon Hendrik Maas is found shot dead in a hotel room. Champagne next to the bed suggests that Maas was not alone before his violent death. The search for the possible perpetrator begins.
Escort girl Tamara Frings is found dead in the bathtub by her roommate. For Professor T., this is his toughest case yet, as he was closer to the victim than anyone suspects.
Professor T. is asked by Chief Inspector Christina Fehrmann to help solve a double murder. The case is explosive: T.'s ex's career is at stake. The staged killing of prosecutor Krämer and his wife resembles a ritual murder that took place 15 years ago. At that time, Christina Fehrmann was instrumental in securing a conviction.
A child has disappeared without a trace, his father brutally beaten. A race against time begins. T. and the investigators try everything to find the autistic boy. T., who discovers parallels between this family and his own childhood, is acutely aware of the depths of the Thierses' despair.
Pilhau, the brewery owner who had been reported missing, is found hanged. T. believes the kidnapping was a perfidious ploy staged by the egocentric man. But his death was certainly not planned. The vast amounts of Pilhaus' blood that were secured after his disappearance, even though the body showed no wounds, also point to the staging.
Chief Inspector Rabe is suspected of taking revenge on the reckless driver who ran over his daughter, shooting two innocent people in the process. Rabe's last hope: Professor T. The two victims, the owner of a fine dining restaurant and drug lord Oppermann and his employee Clara Reuter, quickly lead investigators to her husband, Thomas Reuter.
Professor T. challenges his students to commit the perfect murder—in theory. But theory catches up with practice when the police are confronted with a mysterious murder. After returning from vacation, the Krüger family finds the waterlogged corpse of a Vietnamese man in their bathtub. The case is initially a mystery, the man's identity unknown, and the police have no leads.
The head of an insurance department is found brutally murdered in his office. The case is particularly sensitive for Daniel, as the deceased was the boss of his girlfriend Debbie Schwarz. It turns out that Thomas Schneider regularly harassed the women in the department. But is that enough to be a motive for murder?
A nuclear physics student collapses and dies in Professor T.'s office. For him, the cause of death is clear: acute radiation sickness. But how did she get irradiated? And why did she seek out T.? The deceased was an intern at a research facility, but the intact control mechanisms rule out radiation exposure on site.
At a meeting of a right-wing association, a member collapses dead with a knife in his back. Professor T. delves into a world marked by hatred of those who are different. The victim, Ben Grunert, was a neo-Nazi who was in prison until two years ago. But since his release, he had been leading a double life. T. confronts his mother to find out the truth about his father's death.
The detectives are confronted with a brutal sight when they find the body of a young woman. She has been shot in the face through the door peephole, making identification almost impossible. Karoline Gerber, the girlfriend of the deceased, is shocked when she enters her apartment. It later transpires that Karoline is a witness in the murder trial against drug lord Ezequiel Morales.
Sophia Gruber had big plans when she handed over the company to her son and devoted herself to art. But now the millionaire is dead, lying among the stinking garbage in the landfill. Hans Gruber is shocked. Sophia's son, the sole heir to the Gruber Zünder company, is no stranger to Professor T. At boarding school, they shared a room and fantasized about murdering their mothers.
Kai Schilling is dead. The Cologne tabloid journalist not only had star soccer player Lukas Pommer in his sights recently, but was also the inventor of the "murderous professor." Well-known and unpopular throughout the city for his controversial articles, the detectives are faced with a long list of possible perpetrators.
Christina has been shot. The evidence at the scene makes it clear to the stunned detectives: she must have known the perpetrator! It must have been someone she trusted. Daniel tries to get a name out of her in the ambulance, but Christina's last words before she is wheeled into surgery and placed in an induced coma are solely directed at T.
Complete episode guide for Professor T. with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
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