The early 1900s in Missouri ("Missour-a", as Kate says) was a weird time. But nothing was quite as weird as Bertha Gifford. Between 1906 and 1928, Bertha portrayed herself as a helpful nurse, when in fact, she was poisoning her patients- including at least 17 men, women and children. Nobody was safe from her "tonics", but despite her best efforts, her cruel charades would end in 1928.