prior to the operation. Morris refuses a man who volunteers to have electrodes put into his brain to stimulate pleasure, but realizes that people like Benson could potentially become addicts. He recalls a Norwegian man with schizophrenia, who was allowed to stimulate himself as much as he wanted, and did so to the extent that it actually gave him brain damage. Roger A. McPherson, the head of the NPS, interviews Benson and realizes Manon and Ross were right about his psychosis, ordering nurses to administer thorazine to Benson. After resting for a day, Benson goes through "interfacing". The electrodes are activated one by one to test which ones would stop a seizure. Each electrode produces different results; one stimulates a sexual pleasure. Gerhard, one of the technicians administering the test, shows his findings to Ross, who discovers that the seizures are becoming more frequent. She explains that Benson is learning to initiate seizures voluntarily because the result of these seizures is a shock of pleasure, which leads to him having more frequent seizures. Ross further discovers that, due to a clerical error by the nurses, Benson has not been receiving thorazine. She then finds out that Benson, using the wig and disguising himself as an orderly, has evaded the police officer assigned to guard him and escaped from the hospital. Ross goes to Benson's house, where she finds two girls who say he has a gun and possesses blueprints for the basement of the hospital, where the computer mainframe is located. Morris meets Benson's boss, who tells him that Benson disliked University Hospital because of its ultra-modern computer system, an upgraded IBM System/360. After Benson's dogtag is found at the murder scene of Angela Black, Ross is questioned by police. Benson confronts Ross in her house and attacks her upon having a seizure. Just before losing consciousness, Ross manages to turn on her microwave oven, the radiation of which affects the power pack in Benson's shoulder and forces him to flee. Morris uses a book of matches found on Angela's body to track Benson to an airport hotel. Finding a mechanic who has been beaten by Benson, Morris is attacked and injured as well. Back at the hospital, Ross receives a phone call from Benson, which is traced to somewhere inside the building. The hospital's computers begin to malfunction, as if somebody was disturbing the mainframe. Ross and Anders go