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

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

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

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

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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.

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.

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.

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.

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.

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?

When a young woman is raped and murdered after being kidnapped from a nightclub, Tony Hill is convinced that Jason Eglee is responsible. Ten years previously Tony had got him to confess to the rape of Tracy Bradshaw in what was Tony's first case working for the police. Eglee was released on parole, against Tony's advice, only three weeks before the most recent crime. When a crusading journalist questions Tony's interrogation technique and pushes for Eglee's original conviction to be overturned, DNA testing proves the man is innocent. The evidence notwithstanding, Tony...