Dr. Lightman is convinced that one of his former protégé's students is a sociopath connected to a woman's disappearance, but everyone else is skeptical. Meanwhile, Torres and Loker help a high school teacher who thinks he saw an UFO.
Dr. Lightman is invited to give a lecture for college students by his former professor and affair Helen Dezekis. He goes with Dr. Foster and interviews the student Martin Walker in front of the class in the auditorium. Soon he learns that Martin is a sociopath and present love affair of Helen. However, Dr. Foster does not see any sign in Martin to support Cal's findings and Helen does not believe him. Soon he finds that there is a female student missing and he says that Martin is the responsible. Meanwhile, Loker and Torres interview the renowned high school teacher Sam Hendricks since he says that he saw an UFO and Dean Warren wants to fire him. Loker and Torres sees a footage filmed by one of his students and seek out the truth to save his job.—Claudio Carvalho, Rio de Janeiro, Brazil