About Episode

A former hunter named Martin, who has been admitted into a mental hospital, calls Sam and Dean for help with investigating a case. The brothers get themselves admitted as patients to check out the mysterious creature that has been attacking patients and has made their deaths look like suicide. They find out that they are dealing with a Wraith, a creature that feeds on human brains and disguises itself as a human. The only way to identify a Wraith is through a mirror, which reveals its true form. As the days go by, the Winchesters find themselves hallucinating. After an attempt to kill the hospital's Chief of Medicine, whom they suspect to be the monster, Sam is locked up and sedated with a heavy dose of tranquilizers. Despite his mind being paralyzed by the tricks the Wraith plays on it, Dean is able to figure out that the Wraith must be the nurse who gave them their medical check-up at the beginning, disturbing their minds after touching them. He finds her just as she is attempting to suck Sam's brain dry. After killing her and lifting the curse, the brothers flee from the mental institution.