Helen Duncan was a Scottish medium known for her controversial séances during the early to mid-20th century. Born in 1897, she claimed to communicate with spirits and often produced physical manifestations, such as ectoplasm, during her sessions. Her work attracted both followers and skeptics, leading to significant public interest. In 1944, Duncan was arrested under the Fraudulent Mediums Act for allegedly deceiving people. Her trial garnered media attention, and she became the last person in the UK to be convicted for witchcraft-related offenses. Duncan's legacy continues to spark discussions about the legitimacy of spiritualism and the ethics of mediumship.