A jeweller is run down in the street when he crosses in a hurry. In his bag he has a collection of very valuable diamonds. The police suspect there is more to it and visit his family.

A girl with Downs Syndrome claims she knows who murdered her mother, but she doesn't want to say who it is. She only trusts the professor. Lisa is worried about her father and Dan has a surprise when he turns up for their date.

There is a poisoning at a reception. The police start to think that the real target is a civil servant who forged an environmental report who also was present at the reception. Due to the forged report, the daughter of a young family is very sick in hospital. The child's father might have something to do with the death.

There is a hit on prominent businessman during an official function. The shooter fails but the intended victim is found dead a few days later. A family feud reminds Jasper of his past

Diana Tyson was violently attacked on the university campus where Professor T has tenure. DI Lisa Donckers suspects that the assault is very similar to one that occurred years beforehand, and, having been a previous student of Professor T's, she thinks he can help.

An au pair comes home after an evening off to find her employer unconscious in the living room. His daughter has vanished. The investigation leads the police to his business partner.