This episode of Mr. E's mysteries explores the concept of diffusion of responsibility, also known as bystander effect or bystander apathy. The host discusses a field study where a woman's car broke down on a busy highway, and hundreds of cars passed by without stopping to help. The study showed that people are more likely to help when they are the only ones present. The host also shares a video of a girl trying to save her brother from falling off a waterfall. This demonstrates how people initially hesitate to help but eventually join in when someone takes the first step. The episode concludes with a discussion of the famous Kitty Genovese case, often cited as an example of diffusion of responsibility but with a more complex explanation.