This episode investigates the disturbing phenomenon of serial attacks and murders occurring in subway systems, a surprisingly common occurrence in many major cities. We'll examine how the confined, isolated nature of underground transit hubs provides cover for predators, as well as how overcrowding and poor visibility enable sudden, violent outbursts. Experts will profile the psychology of 'subway slashers' and explain how they select and stalk their victims. We'll also look at controversial proposals to improve subway safety, including increased surveillance and security presence.

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