A boy genius with a chemistry set and absolutely no boundaries.

At just 14 years old, Graham Frederick Young began slipping poison into his family's tea — methodically, patiently, and with detailed notes. He was caught, committed to Broadmoor Hospital, and eventually released as reformed. He was not reformed.

In this episode, Chelsea covers the deeply unsettling case of Graham Frederick Young — the Teacup Poisoner — a self-taught toxicologist who turned every workplace tea round into a deadly experiment, and whose meticulous diary of doses and symptoms became the evidence that finally put him away for life.