specter. Bergman and Helena propose that Mateo, while experimenting with the most primitive, least understood segment of the brain, has tapped a latent paranormal power. Some unknown aspect of his work has stimulated this area to a never-before-seen level of activity, resulting in a destructive force capable of killing. During this, Laura finds Mateo in Hydroponics reassembling his device. With Bergman's announcement that his wave pattern is now detectable by conventional means, Mateo is convinced he is on the verge of a breakthrough. Laura pleads with him to stop, frightened by the force he has awakened. Mateo furiously ejects her from the workroom. Threatening to tell Koenig everything, Laura runs for the main hatch and encounters the figure waiting for her on the other side. With his girlfriend now murdered, the grief-stricken Mateo suffers a breakdown. He admits to threatening both Warren and Laura before their deaths. Mateo feels this force is connected with himself, carrying out his subconscious destructive urges. To bring it out into the open, he asks to recreate his experiment. Koenig agrees and the senior staff assembles in Hydroponics. With the mental power of eight participants, Mateo conjures up a chilling apparition of himself, its right side grotesquely mutilated. The doppelgänger blames Koenig and company for ending its life and says it is a force of vengeance, seeking out those who collaborated in its destruction. During this, Mateo emerges from his trance and is overwhelmed at confronting his own spirit. Mateo collapses and the apparition fades away. Mateo is placed in isolation and heavily sedated. Koenig and Bergman discuss the situation. The professor is fascinated by the concept of a spirit returning to avenge its death before that death has occurred. Koenig's concern is that this force will continue to grow and begin operating independently. Bridging the gap between science and mysticism, Bergman proposes a scientific exorcism. To bring forth the spirit, Mateo is given mezadrine, a psychotropic drug which induces violent emotions. Bergman then encloses Mateo behind a lethal energy barrier. Mateo awakens, furious to find himself locked in an isolation room and in restraints. His rage builds to the point where he threatens to kill Koenig. With that, the wraith springs from Mateo's body, hurling itself at the commander, only to be repelled by the force-field. Trying to reach Koenig, the spirit repeatedly flings itself against the barrier in a murderous frenzy. Mateo tears