Professor T struggles to adjust to a hostile and dangerous new environment. Rabet takes over Flamant's duties and teams up with John to investigate the murder of an inland shipping operator.
Professor T meets an old friend who convinces him that a well-structured life has its advantages, and gains a powerful new ally who needs his help. Meanwhile, a guilt-ridden Flamant visits De Paepe.
John gets a new colleague, ambitious and talented detective Saskia, and together they investigate a prison break, gaining insight from Professor T, who links it to another inmate's death by overdose.
Rabet asks Professor T to help him solve the complex case of a young bride who was found dead in a hotel swimming pool on the day after her wedding and takes the academic to see the scene of the crime
As Professor T's preliminary hearing approaches, he helps the police investigate the murder of a law student who was leading a double life. Saskia's police colleagues get to know her better.
Professor T's psychiatrist Dr Gijselbrecht tries to convince Flamant to tell the truth in court. The police investigate when a man is found dead near railway tracks. John and Saskia vie for promotion.
Professor T's trial begins with a big surprise. Back at the prison, there's turmoil when a guard is found murdered in the laundry. Flamant's testimony reawakens bad memories for Professor T's mother.
Professor T returns to his old life but finds it hard to adjust. A state of cold war exists between John and Saskia. A crime writer who depicted his own murder in one of his books commits suicide.
Professor T hunts for the culprit when his colleague Professor Van der Weyden is struck by a hit-and-run driver. He also probes the murder of a man who was involved in a quarrel with an estate agent.
The police consult Professor T when the daughter of a nursing home resident is killed by another patient. Professor T obsessively pursues the reasons behind his father's suicide, worrying his mother
A homeless man on the verge of death after an accident confides in Saskia that he killed someone. Professor T studies his mother's old diaries and begins to remember more and more about his father.
When a woman is murdered and thrown overboard during a sailing trip, the police investigate. Professor T realises a piece of evidence has been confiscated from the police file on his father's suicide.
When the body of Professor T's father is exhumed and examined, the results point to murder, not suicide, and the troubled academic must try to recall painful memories he has been repressing for years.