Scully and Mulder investigate a particularly gruesome murder at a hospital where a cosmetic surgery patient is butchered by the attending physician. The doctor who performed the operation has no idea why he did it and felt like he was possessed. While Scully looks for a scientific explanation Mulder feels witchcraft may have played a role. He finds five circles burned into the floor of the operating room which, when joined together, form a pentagram. As the uncontrolled killings continue, Mulder discovers a link between the victims' dates of birth and key dates on the witchcraft calendar.
—garykmcd