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.

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.

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.

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.

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.

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.

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 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.

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.

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.

Jasper is no longer consulting for the police. But when a woman disappears from a yacht, his therapist asks him to once again get involved.

While Jasper visits a home for the elderly, a woman is killed by one of the people living there. But there may be more to the murder than meets the eye.

A school inspector is killed, first by five stab wounds, and then by being smothered. Why two different methods?

A stage prop knife is substituted by a real knife. Who did the switch and why?

When a painting is destroyed, suspicions fall on a group of climate activists. But the next attack leaves a dead body behind.

A man staggers in front of a car, and confesses to killing a man before dying. But where is the body?