S1, E6: In 1859, the committee, along with Simon, Grace, and Jerome DuPont begin the anticipated neuro-hypnosis experiment. Once Grace is fully hypnotized and asleep, Mary Whitney's voice echoes from within her body, joyfully claiming to have possessed Grace on the day of the murders, and driving her to assist in the murders. Completely unravelled, Simon evades the committee and flees to Toronto, where he joins the Union Army only to return home, heavily shell-shocked and concussed. In 1872, Grace gets unexpected news and contemplates her future.