When an 11-year old girl is seen being dragged into a car kicking and screaming, the police issue an Amber alert. As the minutes and hours pass by, they know their chances of rescuing the girl diminishes. As Tony Hill reviews the evidence however, he becomes less and less convinced that this is an abduction by a stranger and believes that the girl must have known her attacker. The missing girl's mother is overwrought and her stepfather has a conviction for assault. A sudden twist however changes the entire nature of the investigation leading Tony and DI Alex Fielding ...

Another serial killer is at work. This one kills homeless men by stabbing them through the heart but a bizarre ritual is also at work because the bodies are bathed and wrapped up in paper before they are left around the town's business area. Alex is called away and her place taken by the young Oxbridge graduate Hall,of whom Tony is initially suspicious but he turns out to have a psychology degree and to be a big fan of Tony's work. A more sinister fan,clearly Bryant,is leaving 'presents' on Tony's door-step.

When a young prostitute is found dead, clinical psychologist Dr. Tony Hill sees an immediate parallel with the crimes committed by an incarcerated serial killer, Derek Tyler. There can be no doubt that Tyler is innocent of the most recent crime but the similarities - the women were all blond, young, bound to the bed and cut until they bled to death - cannot be ignored. Tyler was diagnosed as a paranoid schizophrenic but Tony soon realizes that he wasn't hearing voices telling him to commit the murders but rather was taking instructions from someone. The case becomes ..

Tony Hill assists the police in their investigation of a bizarre series of murders. In each case the victims - a property developer, a bishop, a judge - were brutally killed and the killers then immediately committed suicide. Tony thinks there is a connection to the Freemasons, but then realizes that they are dealing with a religious sect that glorifies suicide. He knows from the profile that the head of the sect will be a white male and from the religious symbolism that he will have six disciples, but who are they and how will they find this needle in a haystack?

Dr. Hill pieces together the convoluted history of a formerly retired serial killer and the whereabouts of the latest victim the killer abducted.

Dr Hill is convinced the attacks bear the hallmarks of a different killer - until a bizarre link suggests more deaths will follow.

Tony Hill assists the police in investigating a series of murders. His profile suggests that the man committing these crimes may come forward as a potential witness and the police soon focus in on Bernard Kelly. In his mid-30's and still living at home with a domineering mother, he seems to fit his profile, but Tony has nagging doubts as he finds significant differences in style between some of the attacks. During this time Tony has a house guest, his old friend from university Jonathan Good who is also a psychologist. As time goes by however, he begins to behave ...

The police investigate a series of rapes and murder of young, professional women in the Bradford area. After attacking them, he dresses the victim in a previous victims clothes and leaves their ID on the body. As the investigation continues, they learn from DNA that the man is responsible for at least seven murders over the years, but that he has never been arrested and as such, are unable to identify him. In a separate case, a former patient who has run away from his care home, Jack, contacts Tony. As a child, Jack killed his family and the police are concerned that ...

The suspicious death of a hospital patient leads to post mortems being conducted on other patients who supposedly died of natural causes but now appear to have been murdered. Tony suspects the killer may be a person who believes they are releasing the victims from pain by their actions, guided by religious motives. However Islamic terrorists are also suspected, leading to the involvement of MI5. Carol is under scrutiny and needs Tony's help to keep her job.

The remains of corpses are discovered whilst new foundations are being dug at the Norton Hotel, a building which stands on the site of an abbey, a fact which leads to a suspicion that these were religious killings. Then the hotel is burnt down and,as the first of a series of murders takes place, Carol asks for Tony's involvement. The strange thing is that these murders are identical to those committed some five hundred years earlier.

Several bodies are discovered buried in wasteland. They range from all walks of life and ages but each body is incomplete and their hands have been tied. This leads Tony to suspect that a sadomasochism ring may be involved and leads him to the dominatrix Elektra, who tells him about her clientèle. Sometimes the mildest people outwardly have the darkest secrets.

Tony Hill works with the police to solve the murder of the Johnsons, who were butchered in their flat. When a second victim, Sarah Maynard, is similarly killed they realize they have a serial killer on their hands. William MacAdam, a one-time killer is now one of Tony's students and these new murders are very similar to the ones he committed 30 years ago. He was released from prison as he was considered rehabilitated and has lost the use of both hands due to severe arthritis. Tony is convinced that MacAdam is their man, but he is quite shrewd and it will be very ...

Dr. Tony Hill has his hands full. His principal interest is in solving a string of murders where he can find no apparent connection. A child molester, a divorced woman and an elderly pensioner are all violently killed and while there are a few similarities, the cases suggests that different personalities are at work. He begins to decipher the motives when he realizes that there are two killers working together, alternating their kills. Tony also finds that a woman he's met on an airplane is stalking him and developing a whole fantasy life around him. DCI Carol Jordan ...

Dr. Hill strives to deduce the connection between the bodies of two teenage girls dumped in a lake and the motives for their murder.

Two young men are found murdered, the only connection being that skin from one of them is found under the other's fingernails. As other bodies are found, Tony deduces that a sadistic gay murderer is abducting white boys and forcing them to kill each other. Meanwhile Michael Bryant, the cannibal killer whom Tony helped to put away, sends him a message from the secure unit where he is incarcerated, telling Tony that he is planning to escape and will see him soon.

A police psychologist pursues a serial killer who tortures homosexual victims in increasingly gruesome ways.