Yesterday ' s Enterprise ( episode ) A temporal rift opens , and the " USS Enterprise - C " emerges , changing the timeline into a reality where the Federation is in a bitter war with the Klingon Empire . The only person on the " USS Enterprise - D " who realizes that something is not right is Guinan , and she must help return the displaced starship to its proper time , in order for the " Enterprise - D " crew to save themselves . Summary . Teaser . Worf is sitting alone in Ten Forward when Guinan comes to his table and hands him a glass and asks him to try the drink . Worf tries it and is extremely surprised to find that he loves the drink . Guinan tells Worf it ' s an Earth drink , prune juice , which Worf refers to as " a warrior ' s drink . " Guinan notes that Worf always drinks alone and suggests that he seek out some companionship . However Worf says he would need a Klingon woman for companionship as Earth females are too fragile . He then laughs loudly when Guinan tells him there are women aboard who might find him tame , a thought he considers impossible . When Guinan playfully calls him a coward for saying he ' ll never know when she says he should find out , Worf says he was merely concerned for the safety of his fellow crewmates . Just then , a strange phenomenon appears outside Ten Forward ' s windows and Worf is called to the bridge . Guinan stands up and looks toward the phenomenon and simply utters " " No " . " Arriving on the bridge , Worf is told that the has encountered what appears to be a strange temporal rift in space . Investigating , the crew are unable to confirm exactly what and precisely where the phenomenon is . Worf reports a change in sensor readings . Captain Picard turns his back on Worf and asks Data for more information , who begins to check the sensors . As a starship emerges from the rift , the bridge of the " Enterprise " changes . It now appears much darker and the crew ' s uniforms have more of a militaristic flair to them . No one present seems aware of the changes . Picard turns to the tactical station and asks if the ship that emerged is an enemy vessel . However Worf is gone , and the late Natasha Yar stands in his place . Troi has also disappeared . Down in a much more brightly lit Ten Forward , as Guinan clears a table , everyone is in uniform and " all " are armed . She straightens up and senses something isn ' t right , that everything has changed . As the starship clears the rift , Yar confirms it as a Federation starship and tries to access the ship ' s registry . Commander Riker notes the crew must have had a rough ride . Yar reads the ship ' s registry as NCC - 1701 - C , which causes Picard and Riker to turn toward her in astonishment as Yar finishes reading the name of the ship . . . . Act One . On the altered bridge of the " Enterprise " , Data reports that the sensors confirm that the other ship ' s hull and engine components are of the " Enterprise - C " ' s time period . When Wesley Crusher mentions that the " Enterprise - C " was destroyed with all hands more than twenty years previous , Data corrects him , saying that the ship was " presumed " destroyed near Narendra III , a Klingon outpost . Captain Picard wonders if the ship was adrift for all the years it ' s been missing or perhaps traveled through time . Data says that if time travel does turn out to be the proper theory then the phenomenon they have encountered is a temporal rift , such as a Kerr loop in space which is most certainly unstable and capable of collapsing at any time . Yar then reports that she is able to scan the interior of the ship and she reports heavy damage but she does detect sporadic life sign s . Riker calls sickbay to prepare emergency teams and orders the transporter room s to standby , but Picard belays Riker ' s orders , reminding him that if the other ship has indeed traveled through time then they could be dealing with variables that might alter the flow of their history . At that moment , Yar tells Picard that the " Enterprise " - C is sending out an audio distress call , and Picard orders it put on speakers . Riker mentions that there was no record of Romulans ever attacking the " Enterprise - C " and then Yar reports the voice message has terminated and they are receiving only an automated signal from the vessel . Picard then orders a channel opened and tells the " Enterprise - C " that he is " " Captain Picard of the Federation . . . of a Federation starship " " and tells Garrett to stand by for emergency teams . He then tells Riker to assess the situation and attend to their wounded and above all , avoid all discussions of where and when they are . Riker says he will and takes Yar with him for the away team . Just then , Crusher tells Picard that Starfleet monitor station s are detecting Klingon ships in the area and on their way , and Picard orders battle alert , condition yellow . Meanwhile , the " Enterprise - C " is in bad shape . The away team beams aboard the bridge and Dr . Crusher reports the rest of the bridge crew are dead and that the captain is seriously injured . She and Riker tell Garrett they are from a Federation ship and that they are here to assist . When Dr . Crusher tells Riker she must take Garrett back to " Enterprise " , Garrett demands an explanation , but Riker simply tells her they are from a Federation ship that answered their distress signal and that they will answer all questions , but for now they must get her to sickbay . With that , Garrett relents and allows Crusher to transport themselves back directly to sickbay . At the same time , chief engineer Geordi La Forge tells Riker the ship is in pretty bad shape . Riker tells him if they can ' t stabilize life support they will have to evacuate the ship ; La Forge says he can do it , but he ' ll have to go to engineering , so he calls a damage control party to engineering . Then Yar and Riker notice some rustling underneath some debris . They pull the debris off and discover another survivor , Lt . Richard Castillo , the ship ' s helmsman . Picard arrives back on the bridge in time for a report from the away team . Riker reports back that they ' ve stabilized life support and that La Forge is working on repairing the main power coupling s . He also tells Picard that there are 125 survivors aboard the " Enterprise " - C . When Picard asks for recommendations , Riker says that he ' d hate to have to lose the ship , as Starfleet could certainly use another vessel , even if it is old . While Picard agrees , he also cautions Riker that they can ' t stay in the area too long . Picard allows Riker nine hours to get the " Enterprise " - C under - way to Starbase 105 . If they are unable to do so , then the survivors will be evacuated and the ship will be destroyed . At that moment , Guinan enters the bridge . Seemingly disoriented , she walks up to Picard . When Picard notices her , she says she needs to speak to Picard , claiming : " " This is not the way it ' s supposed to be . " " Act Two . In his ready room , Picard questions Guinan ' s " discovery . " Things don ' t feel " right " to her , things like the bridge , the crew ' s uniforms , their attitudes . Picard asks what has changed and he counters that this is the way it has always been , and asks what else has changed . Families , Guinan says . There should be children on the " Enterprise " . Astounded , Picard scoffs at the idea – the Federation is at war . No , Guinan says . The Federation is not at war , or at least it ' s not " supposed " to be . She tells Picard that " Enterprise " isn ' t a ship of war , but of peace . And the only way to restore that truth . . . is to send the " Enterprise " - C back to its own time , as it does not belong in the present . Reeling from this revelation , Picard arrives in sickbay to meet Captain Garrett , who has just undergone surgery . Garrett asks where they came from , but Picard deflects her question with wanting to know how her ship ended up here . Garrett tells Picard that they were responding to a distress signal from the Klingon outpost on Narendra III and asks if Picard heard it , but he says they didn ' t . Garrett says she ' s never seen a sickbay like the one she ' s in , not even on a starbase . Nor has she ever seen their uniforms . She asks what ship she ' s on . Crusher urges Garrett to be still and relax , but she insists on finding out what ship she is on . Picard tells her that she is aboard the " Enterprise " 1701 - D , a revelation that stuns Garrett . Picard tells her they have traveled twenty - two years into the future . Garrett wants to know if the crew has been informed and Picard says they haven ' t . Garrett says she should inform them and Picard offers to , but he seems hesitant . When Garrett inquires as to why , Picard explains his concern that if they return back with future knowledge , it could upset the timeline even more than their current position has done . Garrett says that they barely escaped with their lives . Picard tells Garrett that history never recorded their last stand against the Romulans . Garrett says they responded to a distress call from Narendra III and engaged the Romulan forces attacking the outpost , but that there were four Warbirds against the lone " Enterprise " . Picard tells her that the outpost was destroyed , and laments that if a Federation starship could have rescued a Klingon outpost , it just might have averted twenty years of war . Back aboard the " Enterprise " - C , Castillo struggles with the news that he is twenty - two years out of time , as Lt . Yar works to bring the weapon s systems up to spec , and attempts to rationalize the situation . Castillo wonders about his family and laments that they ' re probably dead , but Tasha tells him that that ' s not necessarily true . She then tells Castillo that he might not like the future as the war has been very long . She tells him that the Federation has lost more than half of Starfleet to the Klingons . Castillo remarks that negotiations for a peace treaty were well underway when the " Enterprise " left on her mission . Yar says there have been " a lot " of changes . Castillo suggests she fill him in on them . Back on the " Enterprise " - D , Data tells Picard that the anomaly is likely symmetrical . Picard asks Data about what would happen if the " Enterprise " - C were to return through the rift . Data tells him that she would emerge in the midst of battle , at almost the exact instant she left . Picard asks if there ' s any chance of the ship surviving and Data says there isn ' t . Picard realizes then that sending the " Enterprise " - C back would be a death sentence . Act Three . Having returned to the " Enterprise " , Yar tells Castillo that it was the first battleship built by the Federation and that " Enterprise " can transport as many as six thousand troops at once . Yar says she was lucky to get the " Enterprise " and Castillo says he was too , referring of course , to the " Enterprise " - C . They arrive at sickbay and brief Captain Garrett on the " Enterprise " - C ' s current tactical state . When Garrett tells Castillo to concentrate on the ship ' s weapon systems , Yar tells her that there are Klingon battleships in the area . With that news , Garrett sits up , asks Castillo why she wasn ' t informed , and then tells an intervening Beverly Crusher that she must resume her duties ; when Crusher protests that Garrett needs another 24 hours of rest , Garrett tells Crusher that 24 hours might as well be 24 years . Guinan once again comes to Picard in the conference lounge , now transformed into a strategic operations center . Picard asks if she has any more information , but Guinan doesn ' t . Without more information , without proof , Picard can ' t let them return . Guinan states he must . With barely restrained anger and slamming his fist on the table , Picard tells her the " Enterprise " - C crew would die moments after returning . Guinan tells Picard that she wishes she had more information but she doesn ' t . She only has a very strong feeling that this is wrong . Picard then asks who decides which timeline is the right one ? Guinan says she does . That isn ' t good enough for Picard . He will not allow one hundred and twenty - five people to sacrifice their lives on her " feeling . " Forty billion people have already been lost in this war , Guinan snaps back , a war that isn ' t and shouldn ' t be happening . She repeats that the only way to save those billions is to sacrifice that small group of people . But there is no guarantee of success , and everything Picard is tells him that the idea is wrong , dangerous , and futile . Guinan tells Picard that in all the years he ' s known her , she ' s never forced herself on anyone , or to take a stand based on whimsical triviality . Guinan tells Picard that she ' s told him what he must do and Picard only has his trust in her to base his decision on . Guinan then returns to Ten Forward , where she runs into Yar and Castillo , discussing improvements to the deflector system , how her " Enterprise " could now probably last twice as long in a firefight than the " Enterprise " - C . Guinan feels extreme uneasiness at Yar ' s very presence . There is a brief , awkward conversation between the two in regards to Yar ordering their food rations for the meal . Yar tells Castillo that is the first time she ' s ever seen Guinan like that . While Guinan goes to prepare their food , Yar and Castillo ' s conversation continues , with Castillo ' s head spinning a little due to the tactics that Tasha explained , which were more than what he learned at the Academy . Yar tells him he ' ll need it . Then the conversation heads toward more personal territory . Tasha asks what she should call him , now that they ' ve decided they ' re probably past referring to each other by rank . Yar tells Castillo to call her Tasha and Castillo says everyone except his mother , who calls him Richard , calls him Castillo . But when Tasha tries calling him Castillo , he decides he ' d rather she call him Richard . Just then , their conversation is interrupted by a call from Picard , ordering all senior officer s to his ready room . Heading out , Yar and Guinan share another uncomfortable glance . Picard briefs the senior officers on his decision . Crusher is astounded that Picard is going to send them back based solely on Guinan ' s intuition . Riker says there ' s no way the " Enterprise " - C can save Narendra III . Yar then tells Picard that Captain Garrett reported four Romulan Warbirds , leaving the " Enterprise " - C severely outmanned and outgunned . La Forge then presents the possibility of re - arming the " Enterprise " - C with modern weapons , but Picard vetoes it , saying if they do that they ' ll alter the past . Riker says isn ' t that what they ' re talking about but Picard says they ' re talking about restoring the past . La Forge wonders how Guinan would know history has been altered if she ' s been altered along with everyone else . Data suspects that possibly her species has a perception which goes beyond linear time . Picard says there ' s much about her people they don ' t understand but fundamentally she is correct as a ship from the past has traveled through time and there is no way for them to know what effect that might have on the present and that they may never know but Picard has decided the consequences are too great to ignore . When Picard tries to dismiss them , Riker decides to speak again , although Picard tries to stop him , telling Riker that he ' s not seeking their consent and that this was merely a briefing . Riker though , with all due respect , tells Picard he ' s asking 125 people to die a meaningless death , but Data disagrees that it would absolutely be meaningless , pointing out that since the Klingons regard honor above all else , that if the crew of " Enterprise " - C died fighting for the survival of a Klingon outpost , it would be considered a meaningful act of honor by the Klingon Empire . Picard notes that their deaths might prevent the entire war , noting if " Enterprise " - C returns to the battle and its mission is a success , it will irrevocably change history , creating a new future for all of them . Having considered all the alternatives , Picard decides to go with Guinan ' s recommendation and this time , rather emphatically dismisses everyone . Preoccupied by a comment made by La Forge and Crusher about whether they ' ll even be alive in an alternate timeline as they depart the ready room , Yar joins Data in the bridge ' s fore turbolift . Data makes a point when Yar comments that she ' s worried about what will happen to Castillo ; Data tells her that if history is restored , they will have no memory of these events . This disturbs Yar even more . As the crew of the " Enterprise " - C continue repairs , Garrett and Picard discuss possibilities for the ship either staying or returning , and the probability of Guinan ' s accuracy . Garrett gently asks if Picard trusts Guinan ' s judgement . Picard answers yes , that he learned long ago to trust his old friend ' s wisdom . Picard offers to arrange for Guinan and Captain Garrett to speak in person , an offer she declines . Garrett knows there is no chance for survival , and suggests the " Enterprise " - D return with them , and Picard says he can ' t . Garrett accepts that , saying Picard doesn ' t belong in her time any more than she belongs in Picard ' s . She then tells Picard how many of the " Enterprise " - C ' s crew want to return , some for not wanting to be without their loved ones and some because they don ' t like the idea of sneaking out in the middle of a fight . But Garrett has told her crew that the Federation needs another ship against the Klingons and they need to get used to the idea . Picard then tells her if she goes back it could be much more helpful . He then lowers his voice and reveals a disturbing fact to Garrett : the war is going very badly for the Federation , much worse than is generally known . According to Picard , Starfleet Command believes that defeat is inevitable and within six months , they may have no choice but to surrender . Garrett asks if this was caused by their presence . Picard says that one starship can make no impact in the present . . . but twenty - two years ago , one ship could stop the war before it starts . Garrett tells Castillo to inform the crew they will return to their own time . She promises Picard that the Romulans will get a good fight , and that history will remember their actions . Picard tells Garrett he knows they will . As Picard beams back to the " Enterprise " - D , Yar and Castillo say their goodbyes but they are interrupted by an attack from a Klingon Bird - of - Prey , on a scouting mission . Yar mans the tactical station quickly and prepares to fight the Klingons . Garrett contacts the " Enterprise " - D and asks if Picard made it safely back and Riker acknowledges that he did . Despite fire from the " Enterprise " - D , the Bird - of - Prey scores some crucial hits on the " Enterprise " - C , causing a panel near Garrett to explode in sparks , sending her to the ground . As the Bird - of - Prey disappears under cloak , Picard hails Garrett and asks for a damage report but there is no response . After a second hail , Yar contacts Picard and reports that Captain Garrett is dead . Garrett has a piece of shrapnel embedded in her head . Act Four . In the Strategic Operations Center , Castillo enters and tells Picard he is prepared to lead the " Enterprise " back himself . Riker , though , is skeptical , as Castillo is the last surviving senior officer , having limited support from ops , no tactical , and reduced staff in engineering . Castillo interrupts Riker and tells Picard he has good people who wish to do their jobs . Riker believes history didn ' t mean for the " Enterprise " - C to enter this battle without Captain Garrett and while Castillo can ' t speak to that extent , he knows he can get the job done . Just then Data contacts Picard and informs him that likely due to the battle with the Klingons , the temporal rift is destabilizing . Tasha says they can ' t remain there as their coordinates have been transmitted to the Klingon Command . Castillo says then that he intends to return unless Picard orders him otherwise . He then tells Picard that he can have his ship ready in a few hours , that they sustained only moderate damage . With that information , Picard gives his assent and tells Castillo that they will provide cover . Yar takes Castillo to the transporter room where they bid each other farewell again and then after joking about how they seem to have all the time one can afford to have , share a tender kiss , and then Castillo beams back to the " Enterprise " - C . From there , Yar goes to Ten Forward to confront Guinan about her fate in the other timeline . Guinan says she doesn ' t have alternate biographies of the crew , but Yar says there ' s something to the way Guinan looks at her recently and that they ' ve known each other too long for these secrets . Guinan finally reveals that she feels like they weren ' t meant to know each other at all . Guinan then tells Yar that she ' s supposed to be dead and while she doesn ' t know how , she does know it was an empty death , that Yar was without reason or purpose . Resolved , Yar meets Picard in his ready room and asks for a transfer to the " Enterprise " - C , which is in need of a tactical officer . Picard asks why and she says they need one , but Picard says they need her here . Yar then tells him she ' s not supposed to be there and that she ' s supposed to be dead . Picard allows Tasha to sit and is also disturbed that Guinan felt it necessary to give Yar that information , but Yar responds that she wanted to know . Picard tells Yar she doesn ' t belong on " Enterprise " - C . Tasha agrees , she says that Captain Garrett belongs there but she ' s dead . She then says there may be some logic in her request , which Picard angrily disagrees with , saying that , after he calms his voice , " " There ' s no logic in this at all ! Whether they succeed or not , the " Enterprise " - C will be destroyed . " " Yar says that with someone skilled at tactical they might be able to make the difference in the conflict . It may only be seconds or minutes , but that could be the time it takes to change history . Yar says she didn ' t like the thought of dying for no real reason and that , knowing the risks that come with being a Starfleet officer , if she is to die being one , she wants that death to count for something . Picard considers for a moment , and then simply and quietly , grants Yar permission to go . She stands , thanks Picard , and leaves the " Enterprise " - D for the last time . Aboard the " Enterprise " - C , Castillo is making final preparations for departure , placing crewmembers at ops and conn , just as Tasha reports for duty at tactical . Incredulous , Castillo wants to know what she ' s doing and she tells Castillo about how Captain Picard approved her transfer request . Castillo tells Yar they ' re going back through the rift , into battle and not coming back . Yar says that ' s why she came . Quietly , Castillo then tells her he doesn ' t want her aboard , but Yar dares him to find someone in his crew better suited than her to do the job . Castillo knows she is right and welcomes Yar aboard the " Enterprise " - C . Starting to step away from her , he orders her to take her station . Yar does so as Castillo moves over and sits in the captain ' s chair . . . Act Five . Wesley reports three battle cruisers are en route to intercept the two " Enterprise " s . Picard notes how the Klingons don ' t even bother to cloak themselves . Riker is surprised at their audacity , after the pasting they apparently gave the Klingons during a recent battle at Archer IV . Picard nods , and then addresses the crew : The battle begins as the Klingon ships focus all of their firepower on the " Enterprise " - D , whose shields hold . Riker , manning the tactical station , reports photon torpedoes ready and Picard orders them fired using dispersal pattern Sierra . Data reports one enemy ship was hit with moderate shield damage . Another volley from the Klingons causes minor damage to the " Enterprise " s secondary hull . As Picard orders a course change , Wesley reports one of the enemy ships is breaking off to attack the " Enterprise " - C . Picard tells Wesley to keep them within two hundred kilometer s of the " Enterprise " - C , and Wesley turns course to intercept that Klingon ship , with Riker returning fire after the Klingons attack the " Enterprise " - C . La Forge reports from engineering that a starboard power coupling is down and antimatter containment fields suffered damage . The tactical situation for the " Enterprise " dims greatly as the Klingon warships flank the ship in an attempt to draw them away from the " Enterprise " - C . Picard then orders continuous fire of all phaser banks . As the " Enterprise " begins to fire continuous phaser blasts against the Klingons , a focused attack breaks through the shields of one of the ships , destroying it in seconds ; but this is only a small victory , however , as the remaining ships knock out the main sensor array and cause critical damage to the warp core . The shields collapse , and the containment field is failing . As La Forge works to shut down the warp core , plasma coolant bursts free of the core manifold and the warp core builds to overload , with La Forge unable to stop it ; there are two minutes until a core breach . Data reports on Picard ' s request that " Enterprise " - C is now fifty - two seconds from the rift , which is more than enough time . With his ship ' s destruction now inevitable , Picard orders all remaining power to defensive systems . Unfortunately , Data reports power couplings have been severed in the main phaser banks and he cannot bypass . The " Enterprise " is hit again and Riker is killed when part of the tactical console explodes . The Klingons signal , demanding that the " Enterprise " surrender to them . " " That will be the day " " Picard sneers and leaps the tactical rail , trying to fire the phasers himself . After several tries , the phasers fire on one of the Klingon ships , who respond by continuously firing on the " Enterprise . " Picard continues trying to fire as the bridge becomes engulfed in flames . The Klingon ships batter away at the now - helpless " Enterprise " - D . As the ship is mere seconds away from being destroyed , the " Enterprise " - C makes it back through the rift . The timeline is restored and Picard stands on the bridge in the exact spot he was before the timeline diverged . He asks for a report . Worf reports that his sensor readings fluctuated and what appeared to be a ship has now vanished . Data reports the anomaly is closing in on itself . Picard then orders a class 1 probe left behind to monitor the rift ' s final closure . He then orders Wesley to set course for Archer IV . Just then , Guinan calls up and asks if everything is all right . Picard and Riker are surprised to hear her on the intercom . He then tells Guinan everything is fine and asks if there ' s anything wrong . In Ten Forward , Guinan says no , that nothing ' s wrong and she ' s sorry to have bothered them . She then smiles , and goes to a table and sits opposite from La Forge and asks . . . Memorable quotes . " " A warrior ' s drink ! " " " " No . . . " " " " Are you saying it is and yet it isn ' t there ? " " " " NCC - 1701 . . . C . USS . . . " Enterprise . " " " " Families . There should be children on this ship . " " " " What ? Children on the " Enterprise " ? Guinan , we ' re at war ! " " " " No we ' re not ! At least we ' re not . . . supposed to be . This is not a ship of war . This is a ship of peace . " " " " Is there any possibility she could survive ? " " " " None , sir . " " " " Then sending them back . . . would be a death sentence . " " " " Who is to say that this history is any less proper than the other ? " " " " I suppose I am . " " " " Not good enough , damn it ! Not good enough ! I will not ask them to die ! " " " " Forty billion people have already died ! This war ' s not supposed to be happening ! You ' ve got to send those people back to correct this ! " " " " And what is to guarantee that if they go back they will succeed ? Every instinct is telling me this is wrong , it is dangerous , it is futile ! " " " " We ' ve known each other a long time . You have never known me to impose myself on anyone or take a stance based on trivial or whimsical perceptions . This timeline must not be allowed to continue . Now , I ' ve told you what you must do . You have only your trust in me to help you decide to do it . " " " " To be honest with you , Picard , a significant number of my crew members have expressed a desire to return even knowing the odds . Some because they can ' t bear to live without their loved ones , some because they don ' t like the idea of slipping out in the middle of a fight " . " " " The war is going very badly for the Federation , far worse than is generally known . Starfleet Command believes that defeat is inevitable . Within six months , we may have no choice but to surrender . " " " " Are you saying all this may be a result of our arrival here ? " " " " One more ship will make no difference in the here and now , but twenty - two years ago , one ship could have stopped this war before it started . " " " " But there ' s something more when you look at me , isn ' t there ? I can see it in your eyes , Guinan . We ' ve known each other too long . " " " " We weren ' t meant to know each other at all . At least , that ' s what I sense when I look at you . Tasha , you ' re not supposed to be here . " " " " Mr . Castillo ? " " " " Yes , captain ? " " " " Inform the crew - we ' re going back ! " " " " [ . . . ] at least with someone at tactical , they will have a chance to defend themselves well . It may be a matter of seconds or minutes , but those could be the minutes that change history . Guinan says I died a senseless death in the other time line . I didn ' t like the sound of that , captain . I ' ve always known the risks that come with a Starfleet uniform . If I ' m to die in one , I ' d like my death to count for something . " " " " Attention all hands . As you know , we could outrun the Klingon vessels . But we must protect the " Enterprise " - C until she enters the temporal rift . And we must succeed ! Let ' s make sure that history never forgets . . . the name . . . " Enterprise " . Picard out . " " " " Federation ship " Enterprise " , surrender and prepare to be boarded . " " " " That will be the day . " " " " Geordi , tell me about . . . Tasha Yar . " " Links and references . References . 2344 ; 2346 ; 2362 ; alternate timeline ; ; Archer IV ; auxiliary fusion generator ; Barrett ; battle alert ; Battle of Narendra III ; battleship ; Cetacean Ops ; class - 1 probe ; combat information center ; containment field generator ; coolant leak ; dispersal pattern ; Earth ; electrolyte ; emitter ; evasive maneuvers ; facial expression ; Federation - Klingon War ( alternate timeline ) ; gravimetric fluctuation ; ; Kerr loop ; kilometer ; Klingon s ; Klingon Bird - of - Prey ; Klingon Empire ; ; monitor station ; Narendra III ; navigational sensor ; Null - G ward ; patient ; phaser bank ; photon launcher ; photon torpedo ; prune juice ; Romulan s ; Romulan Warbird ( 2340s ) ; Romulan Warbirds , Unnamed ; Selar ; Starbase 105 ; Starfleet Academy ; statistics ; superstring material ; temporal rift ; Thomas ; Thoms ; TKL rations ; tricordrazine ; war room Unreferenced material . accelerator coil ; Archduke Ferdinand ; Bel - Zon ; engine control processor ; ; Station Salem Four