As Dr. Hill closes in on the homophobic psychopath, he almost falls victim to him, or her. Who can tell?

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.

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 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 ...

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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?

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 ...

Tony attends a conference of psychologists, where he is a guest speaker and where he meets an old friend Rachel White, another delegate. He has drinks with her in her room but leaves before having sex. Next morning she is found dead and he was the last person to see her alive, marking him as a suspect. Then another psychologist is also murdered whilst Alex investigates a serial killer whose targets are prostitutes.

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 ...

Tony Hill and the police search for a serial killer who has resurfaced after five years time and targets children from abusive homes. DCI Jordan is in hospital after being mugged and hit by a car.

A sniper is at work and Tony Hill is having trouble profiling him. The killer leaves a playing card at each site but there is no apparent connection among the victims. As the deaths rise, people are walking the streets in fear, the media is in a frenzy and DCI Carol Jordan is under extreme pressure to solve the case. Tony has a bigger problem however when a medical exam reveals he has a brain tumor that is growing rapidly and is likely malignant.

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

Dr. Hill tries to determine if the murders of two young girls were done by the same person.

Tony's patient, the child killer Maggie, is on the verge of revealing where she buried her victims, but Tony and the police are distracted by a serial murder case involving the roommate of one of his students.

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 ...

When a rapist who was convicted on Tony's evidence is released Tony appears to be discredited. To make matters worse Carol has left for South Africa without even saying goodbye to him. He offers his help to her successor, Alex, another female officer, when a number of young women are found dead, their bodies buried in fields. Tony relates this to a sado-masochistic Internet site used by the murderer to lure his victims to their fate by playing, and then preying, on their sexual fantasies.

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.

Another victim disappears and a severed finger is sent to constable Chris Collins in an envelope, suggesting that the killer is into playing cat and mouse games with him. Chris, a new young constable whose attitude Alex dislikes, then disappears and is abducted by the murderer who strips him and strings him up. Tony realizes that the killer is the sort of person that anybody would trust - such as a doctor - as he races to save Chris's life.

Tony is allowed to assist in the investigations. He sees the murders as ritualistic as 'Power Not Truth' was written in the dead doctors' blood. He also begins to see a connection with the murders of the prostitutes and, against Alex's advice, offers himself as bait to trap the killer.

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.

An Asian man is killed but the pattern is different to the serial killings of the white boys which appears to have stopped. However, Ellie, a young widow, is abducted and, in the search to find her, Tony looks for comparisons with the other murders. Bryant, claiming that he has found God, asks for an audience with the secure unit's chaplain, whom he then kills, making his escape in the chaplain's robes.

Newly promoted to Detective Chief Inspector, Carol investigates a murder which seems to bear the hallmark of gang boss Gavin Cochran. However Cochran is behind bars for murder and could not have done it. Carol asks Tony to work out any links between the two slayings, leading to the arrest of Cochran's brother George. But there is a fight during which George ends up in a coma. Gavin is released from prison for a compassionate visit, during which another killing takes place, allowing Tony to test his theory and trap the murderer.

Tony Hill and DI Alex Fielding find themselves investigating the ritualistic murder and mutilation of children. It becomes apparent to Tony that the perpetrators are casting voodoo-like spells on a variety of victims. The investigation reveals several possible suspects including a so-called preacher, Dr. Kingston and a brute of building contractor whose building site is shut down when a young boy's heart is found buried there. The power of suggestion begins to affect several of the team, including DC Paula McIntyre who finds herself hospitalized from a strange ...

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.