Hearts of Stone (S05E03)

Lydia Sherman, a devoted mother and wife, systematically poisoned her meals with arsenic, leading to the deaths of three husbands and all of her children. Paula Sims, a troubled young mother, took the lives of her two daughters, sparing her son because she believed boys were more valuable. Meanwhile, Velma Barfield, under the grip of powerful drugs, appeared to be a nurturing caretaker while covertly administering arsenic to her victims. Once she was clean, she earned the chilling nickname 'angel of death row' before facing execution for her crimes.