Psychopaths have long captured the public imagination. Painted as charismatic, violent predators lacking in all empathy, they provide intrigue and horror in equal measure. But what precisely is a psychopath? What is it that drives them to cause harm, even kill? And can they ever be cured?

Presented by psychologist Professor Uta Frith, this is an in-depth exploration of the psychopathic mind including one of the most notorious of all, Moors murderer Ian Brady. Through an ongoing correspondence between the Horizon team and Brady, the film features some of the very last letters he wrote. The film also features a series of candid interviews with prison inmates who not only describe their crimes but why they think they committed them.

Horizon explores not only how each individual's crimes were shaped by their own life experiences, but also gives an insight in to how these people think and behave. Working with the world's experts in the field, the film sheds light on the biological, psychological and environmental influences that shape a psychopath. And it looks to the future, with groundbreaking research that suggests a lifetime of incarceration is not the only option to manage violent and dangerous psychopaths.

长期以来，精神病患者一直吸引着公众的想象力。他们被描绘成魅力四射、缺乏同情心的暴力捕食者，他们提供了同等程度的阴谋和恐怖。但究竟什么是精神病患者？是什么驱使他们造成伤害，甚至死亡？他们能治好吗？

由心理学家尤塔·弗里斯教授提出，这是对精神变态心理的深入探索，其中包括最臭名昭著的摩尔人杀人犯伊恩·布雷迪。通过Horizon团队和Brady之间的持续通信，这部电影展示了他最后写的一些信件。这部电影还对监狱囚犯进行了一系列坦诚的采访，他们不仅描述了他们的罪行，而且还描述了他们认为自己犯下罪行的原因。

Horizon不仅探索了每个人的犯罪行为是如何被他们自己的生活经历塑造的，而且还深入了解了这些人的思维和行为。这部电影与该领域的世界专家合作，揭示了塑造精神病患者的生物、心理和环境影响。展望未来，开创性的研究表明，终身监禁并不是管理暴力和危险心理变态者的唯一选择。