Professor T.

When a girl is raped on campus in circumstances identical to an unsolved case from 10 years previously, inspector Donckers calls upon her former psychological criminology Professor T to help crack an impossible case. Simultaneously expert and eccentric, his curious methods ruffle a few feathers along the way.

A university's chief librarian is poisoned, police believe he may have been the wrong target and their fears are confirmed when they discover another victim. Professor T is summoned to help solve to help solve the crime, to the horror of Chief Inspector Rabet who is yet to be convinced by his controversial ways.

The chairwoman of the school's inspection team is murdered at home. At first sight, it looks like a robbery gone wrong but Professor T is convinced the school principal is somehow involved. Annelies and Daan confront Rabet over his increasing drink problem but agree not to tell the commissioner. Annelies meanwhile, opens up to Daan about her father's Alzheimer's.

The police investigate the disappearance of a first-year law student with several secrets to hide. Meanwhile, Professor T is visited by a call girl and make a special arrangement. Due to her erratic behaviour, Daan begins to suspect Annelies has a boyfriend but she soon puts him straight. Meanwhile Inspector Rabet's drink problem is getting worse and Annelies loses her temper.

A plastic surgeon is killed and the police are looking for a woman he spent the night with. Professor T believes she is innocent but Commissioner Flamant has forbidden her team to contact him for help. Professor T begins his own investigation, with serious consequences. Meanwhile, Annelies, agrees to go on a date with Daan and Professor T's mother becomes increasingly concerned about her son.

The call girl who visits Professor T is found dead in her apartment. The police believe she has committed suicide, but Professor T is not so sure and hides the fact that he knows the victim to stay on the investigation team. Inspector Rabet is back and he hasn't forgotten that Professor T betrayed him in front of his colleagues and Annelies and Daan are not speaking to each other.