In 1971, a deadly plot unfolded at John Hadland Laboratories. Graham Young, a convicted poisoner with a chilling fascination for toxins, was employed there. This gripping documentary reveals how he used thallium, a highly toxic heavy metal, to target his coworkers, leading to death and illness. Hear firsthand accounts from former employees who survived his poisoning, and delve into the science behind this terrifying case. Subscribe to Real Crime for more true crime stories: youtube.com/c/RealCrime #PoisonousLiaisons