Displaced ( episode ) " Voyager " crew members begin disappearing one by one , being replaced by aliens . Summary . Teaser . With a " bat ' leth " in hand , an enraged B ' Elanna Torres storms out of a holodeck , followed closely by Tom Paris . Torres resents the fact that Paris took her to a Klingon training session . She laments Paris ' new - found interest in Klingon martial arts , and insists that she is not interested in holographic disembowelment . An argument between the two ensues . Paris calls Torres hostile . At that moment an alien is transported on to . The man appears to be lost and confused . Act One . Shocked at the visitor , Paris signals the bridge . The alien appears frightened , and out of place in " Voyager " s artificial environment . He is brought to sickbay , where he is examined by The Doctor . The alien identifies his species as Nyrian . He claims to have been walking in the street when he was transported aboard . When inquired about how he came aboard " Voyager " , he described feeling lightheaded , everything around him " bending , or rippling " , then a curious sensation . They soon realize that at the instant that the Nyrian was transported aboard " Voyager " , Kes was transported away . Concerned , Captain Janeway orders Kim and Torres to start investigating . There are no indications that a ship could have transported them , and that the closest inhabited system is over ten light year s away . Ensign Kim is beamed away a few minutes later , and another Nyrian appears on the bridge . Nyrians are now regularly appearing on " Voyager " . At a senior staff meeting , it ' s revealed that in the last three hours , twenty - two people have disappeared , and that in eighteen hours , the entire crew will disappear . Torres explains that what is happening could have been anything , a naturally - occurring phenomenon or a kind of technology . She shows a surge in polaron particles , and a spatial distortion field surround the abductees before they disappear . Chakotay does not feel threatened and considers the Nyrians friendly , but Janeway has a gut feeling that something is wrong about them . Act Two . Concerned , Janeway has the Nyrians confined to the cargo bay s and orders that all non - essential functions are to be shut down . In engineering , Torres has a theory that " Voyager " has snagged onto a wormhole the moment that it was forming . Soon , Janeway herself is beamed away . With a skeleton crew , Chakotay is left in command . He mans the helm and an ensign has tactical . Neelix is soon abducted while he is on the bridge . Chakotay has all computer interfaces restricted to Starfleet voiceprint s only . Torres is working with a Nyrian scientist , conducting a tetryon scan of the area against the scientist ' s objections . Torres concludes that the anomaly isn ' t a wormhole , nor is it a subspace flow field . The scientist , Rislan , strikes his security guard and grabs the guard ' s phaser . He then presses a few buttons on the control panel and says that she has been moved to the front of the line . She is transported to an idyllic version of Earth , along with the missing crewmembers . Act Three . The Nyrian security guards take her combadge and leave . Torres , Janeway , Kes , and Paris all swap theories on what is going on , and what the Nyrians want . Tuvok reports that the crew is spread across twelve different compounds and at all ends there is an insurmountable barrier , a cliff or a river . Torres notes that the environment is not suitable for the Nyrians , but in fact seems to be have been built created speifically for " Voyager " ' s crew . Crewman Gennaro tells Chakotay that Rislan ' s guard , Ensign , is unconscious in engineering and that Rislan and Torres are gone . Chakotay runs to the cargo bay to have a talk with the Nyrians . He draws his phaser and jumps into the room in an aggressive posture . The room is empty , confirming his suspicions that the Nyrians are behind the disappearances . He issues a security alert to the remaining twelve crewmen on board . The crew moves to secure engineering and the bridge , but it is futile . The Nyrians storm both stations and easily overpower the personnel there . Chakotay knows that with only a couple of crewmembers remaining including himself , they have no chance of retaking the ship , so he orders the remaining personnel to sabotage anything they can however it isn ' t long before he ' s the only one left . Chakotay finds that the Nyrians are trying to delete The Doctor ' s program and heads to sickbay . Arriving successfully , Chakotay transfers The Doctor to his mobile emitter as the Nyrians corner him . As he surreptitiously pockets the emitter , Chakotay surrenders and he is transported to the surface , allowing the Nyrians to have successfully taken over the ship . Back at the prison compound , a Nyrian woman named Taleen appears and welcomes the " Voyager " crew to their new home . The Nyrians expand their civilization by gradually switching places with the crews of ship s , space station s , and colonies and transport their victims to an artificial environment drawn from the victims ' own databases . The Nyrians see themselves as benevolent jailers , but Chakotay remarks that it is " still a prison . " As soon as Taleen leaves , Janeway begins to plan their escape , theorizing that the entire place is likely to be a holographic projection . An alien named Jarlath appears to welcome the crew , saying he is their new neighbor . Act Four . Jarlath reveals that there are other environments holding different species and that each environment is tailored to the requirements of its prisoners . Jarlath has found a portal between his environment and the one holding the " Voyager " crew , and Janeway trades him a couple of baskets of food for the means to locate the portal . That evening , Torres reconfigures the EMH ' s optical sensors to detect the microwave signature of the portals . She apologizes to Paris but an argument between the two ensues . The Doctor makes comments about the exchanges with psychological analysis until Torres reconfigures the EMH to make The Doctor mute . The EMH discovers a portal that leads into the control area of the prison colony . Janeway , Tuvok , Torres , Paris , and Jarlath enter the control area and split up , carrying home - made phasers " improvised " by Tuvok . Janeway and Tuvok use a control station terminal and learn that there are 94 different environments , and that they are actually on a ship . Just as they learn more information , an alarm begins to sound . Act Five . The Nyrians are alerted to their presence outside their environment , and Dammar authorizes Taleen to use force to return the prisoners to their habitats . Dammar also orders " Voyager " to be taken to the biosphere vessel to reinforce them . With Nyrian guards on their tail , Torres and Paris ( minus the anxious Jarlath who surrenders to the Nyrian guards ) are trapped inside the corridors of the Nyrian ship . They come to a frigid , snowy habitat and Torres recalls how the Nyrians found " Voyager " too cold . Assuming that the Nyrians would not want to pursue them , they enter the habitat . Taleen orders her guards to follow them . Using Tuvok ' s phaser , Torres and Paris manage to stun the guards , but then find themselves lost in the wintry landscape , unable to return to the portal . Meanwhile , Janeway and Tuvok evade capture , and Tuvok uses the Vulcan nerve pinch on a Nyrian guard . They discovers the translocator that the Nyrians used to switch places with the " Voyager " crew , and attempts to gain command of it . Just as Torres seems about to succumb to the cold , she and Paris find themselves back in the , and Dammar and Rislan find themselves in the icy Argala habitat . Janeway and Tuvok have learned how to use the translocator , and Janeway threatens to relocate all the Nyrians to the Argala habitat unless her crew and all the other prisoners are freed . Faced with death by hypothermia , the Nyrians surrender and relinquish " Voyager " to Janeway . The alien prisoners are freed , and their native worlds are contacted to take them home . Paris and Torres reconcile their relationship by relaxing on the holodeck . Memorable quotes . " " Welcome to sickbay – take a number . " " " " I ' ve reconfigured The Doctor ' s optical sensors and as soon as they ' re aligned he should be able to detect the microwave signature of the portals . " " " " Then I can begin my new career as a tricorder . " " " " Shows how much you know about Klingons . They have much less tolerance for the cold than Humans do . " " " " Really ? I thought that was Cardassians . " " " " No , they just complain about it more . " " " " On your feet , that ' s an order ! " " " " You can ' t give me orders , we ' re the same rank . " " " " I ' m a bridge officer , and I have seniority . " " " " Yeah , by about two days ! " " " " You just pretend that nothing bothers you and then you turn everything into a joke . " " " " That ' s a valid observation . Defense mechanisms come in many forms . " " " " That ' s ridiculous . l am an easygoing person . . . who is just trying to be friendly to someone who is obviously terrified of having a friend . " " " " Fear of intimacy is a common indication of low self - esteem . Perhaps if you stopped to analyze the root cause , you might . . . " " " " How do you like your first day as chief of security , ensign ? " " " " It ' s everything I dreamed of , sir . " " " " Who says there ' s no room for advancement on this ship ? " " " " You don ' t think I ' m hostile , do you ? " " " " I , uh . . . wouldn ' t describe you that way , no . " " " " I know that I have a temper , but that doesn ' t mean that I ' m always hostile , does it ? " " " " No , of course not . " " " " I am forthright ; I speak my mind . That is very different from being hostile . " " " " Very different " " " " And if someone described me that way , they ' d be way off the mark , wouldn ' t they ? " " " " Way off . " " " " Then why do you look like you ' re afraid for your life ? " " Links and references . References . 47 ; Acacia ; access point ; all hands ; Argala ; artificial biosphere ; astrophysicist ; " bat ' leth " ; bio - scanner ; Bourget ; Bowsers ; Calentar ; Cardassian s ; Celsius ; colony ; disembowel ; electrofluidic target servo s ; emergency power ; English language ; EPS relay ; Federation ; holodeck ; hydrogen ; interstellar dust ; Jefferies tube ; kilometer ; Klingon s ; level - 1 analysis ; lightheaded ; microcellular scan ; microwave ; neutrino ; Niacin ; Nyria III ; Nyria V ; Nyrian ; Nyrian biosphere vessel ; Nyrian system ; optical resolution ; photosynthetic bioprocessor ; polaron ; Porcion ; quantum level ; Quitar ; red giant ; Rite of Tal ' oth ; sabotage ; security alert ; security subroutine ; seniority ; skeleton crew ; sonic shower ; spatial distortion field ; spatial harmonics ; standard issue ; Starfleet Academy ; subspace flow field ; Survival Strategies ; Tanatuva ; tetryon ; tetryon scan ; theta - band radiation ; translation algorithm ; translocator ; tricorder ; voiceprint ; Vulcan s ; Vulcan ( planet ) ; wormhole ; Zooabud