Tessa and Steve investigate when a young blind man is found dead in a swimming pool.

A sports teacher is found impaled at a boarding school and is found by Fisk's older sister. Tessa and Steve investigate, but Fisk is frustrated when his sister is interviewed, and he is excluded.

A mutilited body is found near a church, with identical markings to the victims of a serial killer 15 years ago- Thorne's first case. Experiencing a sense of deja-vu, Thorne heads the investigation. Has the killer returned, or is this a copycat crime?

Steve and Tessa investigate when a young woman is found hanging from a tree limb in a popular city park, and Tootsie's preliminary findings indicate it was not suicide.

A vagrant is found dead at an inner city underpass surrounded by the corpses of poisoned sparrows. When Tootsie diagnoses death by strychnine, Tessa, Steve and Thorne fear that someone is out there trying to purge the streets of the homeless. But the investigation takes a twist after Fisk finds $10,000 hidden in the vagrant's mattress.

When a woman is found murdered in a neighbourhood that is terrorised by a local gang, Steve and Tessa are called in to investigate.

Tessa and Steve are called in to investigate a series of murders revolving around a prominent bio-chemistry lab.

Tessa and Steve investigate what appears to be a routine case, but soon uncover a dangerous web of blackmail and righteous fanaticism.

Following the suspicious death of an elderly worker, Tessa and Steve must race against time to avert another tragedy growing from the ruins of the first.

Tessa and Steve uncover a web of intrigue surrounding businessman Brian Hart's horrific death when he is killed as he commutes to work by train when a letter bomb concealed in a card explodes. Tessa and Steve are confronted by a bewildering array of suspects and motives to finally apprehend the person they believe to be the killer, only to realise at the last moment that they only have it half right.

Tessa and Steve investigate a murder where nothing is as it seems.

When horror novelist Sebastian Tombs is found lying dead with a knife in his back, Tessa and Steve must investigate the four people closest to him, each of whom has a strong motive for committing the murder.