On March 23, 1944, as the Allied Forces were preparing for D-Day, Helen Duncan stood in the dock of Britain’s highest criminal court accused of:violating the Witchcraft Act of 1735. At the time of her arrest, Helen Duncan was Britain’s most controversial psychic, a celebrity medium with a notorious reputation. During her seances, she channeled spirits who spoke from the world beyond, and on a few occasions, her “spirit” seemed to know too much: Helen’s seances were accurately revealing top-secret British ship movements. Intelligence authorities wanted “Hellish Nell” silenced. Sometimes comic, sometimes tragic, The Strange Case of Hellish Nell is a true crime tale laced with psychic phenomena and wartime intrigue.