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.

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.

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

When a student is left badly burnt and in a coma after a house fire, the CID team call in Professor T after it emerges the victim was drugged.

The Professor is asked to decipher a macabre puzzle when a doctor and her family are found dead in a grisly tableau on their living room sofa, each having died by different means. But in which order and by whom?

When an artisan baker is found dead after receiving death threats, the police appear to have an open and shut case against the son of a convicted murderer who was sent to prison thanks to the baker's testimony.

When a body is found floating in a hotel swimming pool, the police suspect foul play and decide to get Professor T's help.

Professor T is desperate to get back to his work when he is called on by the police to investigate a series of unexplained deaths.

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.

A prominent barrister and his wife are found shot dead in a crime that has uncanny similarities to a double murder that the barrister successfully prosecuted 15 years earlier.

When Professor T is jailed and finds the sights, sounds and smells of prison hard to take, Dan and Lisa try to distract him with a murder case.

Professor T conducts a series of lectures for his students detailing a high-profile court case in which a caretaker is accused of murdering his employer; the accused was found standing over the victim's body and his fingerprints on the murder weapon, but Professor T is convinced of his innocence, bringing him into conflict with the CID team and DI Paul Rabbits as the investigating officer.

Professor T is up in court and must decide whether to save himself or his former lover, and there are no end of suspects in a prison officer's death.

After discovering the body of an undercover police officer, the CID team blunder into a Drugs Squad operation against a major trafficker that appears to implicate one of their closest colleagues.

Professor T must prove his innocence when he comes under suspicion after a murder at a criminology conference.

When a body is found at the scene of a car crash, Professor T investigates and finds some uncomfortable resemblances to his own situation.