The podcast episodes provided demonstrate various examples of sadism, where the perpetrators took pleasure and derived satisfaction from the suffering and torture of their victims.

In the episodes about 'Jolly Jane' Toppan, the serial killer displayed a sadistic nature, as she would intentionally overdose her patients and take pleasure in watching them suffer and die. Similarly, the episodes discussing the Snowtown Murders and the 'Happy Face Serial Killer' highlight the sadistic tendencies of the perpetrators, who engaged in prolonged torture and cruelty towards their victims.

Across these episodes, the common theme is the perpetrators' disregard for human suffering and their willingness to inflict pain and anguish on others, often for their own personal gratification.