Mulder undergoes an experimental form of hypnotherapy to recover his memories about his sister's abduction but the treatment has side effects including psychotic behaviour.
After a man kills three people and his wife because he mistook them for a ruthless Bosnian dictator, Mulder and Scully discover a test involving mind control using ti vi signals that make people's worst fears become real in any form.
When a series of murders occur among a group of scientists working on advanced propulsion technology, Mulder and Scully are called in to investigate. All evidence seems to point to the janitor Roland, who is mentally handicapped.