- Herself - Forensic Psychologist: There's myth about the serial killers, that they're all sexually compelled. Not by a long shot. Many are motivated by greed. Anger will motive some. Power. Some have no particular reason at all. Uh, they just start doin' it, and then they keep doin' it.
- Himself - Former Detective Inspector: [on investigating homicides] I know you get used to it, but there's every now and again you find a murder scene that is disturbing.
- Himself - Former Detective Inspector: When Dad died, don't forget he was only ten, and he took over his armchair straightaway and bullied the whole family. Beat the girls, beat Mother - just like Father had done.
- Himself - Journalist: He was in and out of mental hospitals but nobody seemed to appreciate the seriousness of his personality disorder and to actually do something about it.
- Himself - Forensic Psychologist: Those who evaluated MacKay early on called him a psychopath, and I think that's probably... obviously correct. He had no interpersonal bonding or attachment to anybody; but, it's more than that, because he was just so strikingly anti-social.
- Himself - Schoolfriend: It was just him against the system, and the system was very harsh.
- Himself - Author, Psychopath: About a year later when he was being treated in a nearby mental institution, one of the psychiatrists described him in writing as a cold psychopathic killer. Amazing foresight as it turned out.
- Narrator: Mackay's erratic behavior led to yet another stint in Moss Side Psychiatric Hospital, where he demanded to be known as Franklin Bollvolt the First, a name he proclaimed to be feared and remembered like Hitler's. In fact, Mackay developed an extreme and bizarre fascination with the Nazi regime.
- Himself - Forensic Psychologist: Mackay became interested in Nazis and Nazi atrocities because this interested him. He was interested in committing atrocities. This is what Mackay's psychology was. He wanted to hurt people in any way he could, and so reading about or seeing others like the Nazis and what they did to other people was immediately interesting to him.
- Himself - Author, Psychopath: He had himself photographed with a swastika on one arm. His room at home, covered in memorabilia, became a kind of Nazi shrine. He was under the impression that, uh, he was 100% pure Aryan. Uh, he was, of course, one quarter black.
- Himself - Former Detective Inspector: The authorities must have known they had a very serious case on their hands; and, there's no doubt, he was released by the authorities, unfortunately, to kill.