Sure, the scenes with murderers like Monte Rissell and Richard Speck are chilling, but none hold a candle to the tense interactions with Ed Kemper (especially when he's one-on-one with Holden). 6'5" Umbrella Academy alum Cameron Britton does a fantastic job of portraying the 6'9", over-250-pound killer, who had high intelligence and an outgoing, social nature (both of which helped to mask the butcher underneath).
Kemper became known as "The Co-Ed Killer" after murdering a string of six young, female college students in northern California, as well as his mother and his mother's best friend. Kemper would abduct the women, murder them, and then commit necrophilia with the dead bodies before dismembering them and disposing of the remains. He was apprehended in 1973, and the 68-year-old is still incarcerated in the California Medical Facility.
Image Sources:
Netflix and Getty / Bettmann