Through the Looking Glass ( episode ) In the " mirror universe , " Sisko must persuade the alternate version of his dead wife to join the Terran Rebels , or he will watch her die a second time . Summary . Teaser . Sisko , Odo , and Quark are in the station commander ' s office debating the disposition of 27 Cardassian vole s which Sisko claims are intended for fighting . Apparently Quark and Morn were discovered painting numbers on the voles ' backs , even though Quark claims that they were Morn ' s pets . Sisko orders that the voles be confiscated , suggesting that if Morn wants new pets , he can get some goldfish . Quark says " " Poor Morn . This is gonna break his hearts . " " Sisko then walks out into Ops , where he tells an unnamed lieutenant " Ops is yours " and walks toward the turbolift landing . . . just as the car arrives carrying , who is out of uniform . As O ' Brien steps off the turbolift he tells Sisko that he needs to converse privately , then draws a phaser . However , Sisko immediately orders the Ops crew to stand down . After ordering Sisko onto the transporter pad , O ' Brien waves a multidimensional transporter over the normal transporter controls , after which O ' Brien and Sisko transport to a raider and Sisko asks where they are . " " I guess you could say we just stepped through the looking glass , " " O ' Brien says in reply . Act One . O ' Brien leads Sisko into another compartment , and , in a quick moment , Sisko disarms him . At barrel ' s end O ' Brien confirms that they are in the mirror universe . Since the time last year Kira and Bashir crossed over , the s have started a rebellion against the Klingon - Cardassian Alliance , and the rebellion at issue was led by . . . until he was killed . Sisko demands to be taken back to his own universe , as he can ' t further influence events there . O ' Brien then encourages him , explaining that , in his universe , is very much alive , working for the Alliance on a trans - spectral sensor array that will enable the Alliance to root the rebellion out of their bases in the Badlands . In closing , O ' Brien explains that if Sisko will not retrieve her from , the rebels will be left with " no choice but to kill her . " Sisko concedes than he cannot bear the death of a second Jennifer Sisko , and agrees to attempt her rescue . On Terok Nor , Jennifer Sisko arrives at Intendant ' s quarters , clearly not enthusiastic about talking to her . The Intendant informs Jennifer that her husband has been killed , but she is not phased , as they did not part on good terms . Back on the raider , O ' Brien – or rather " Smiley , " as he ' s reminded Sisko to address him – explains that Jennifer despises her late husband , who was much better at fighting than leading . Finally the two of them transport to a rebel base , where a new mission is under discussion . It appears is ready to take charge of their force , and wants to simply smuggle explosives on the station and detonate them , no matter the risk . Just then , Sisko and Smiley enter . As Bashir looks on Sisko with a gimlet eye , points out that they all thought Captain Sisko dead . Sisko attributes it to propaganda . He successfully wins over the group with his confidence , but then saunters in to give Sisko a kiss of gratitude , a slap across the face for letting her think that he was dead , and a question : " " are you coming or not ? " " Sisko hangs back so that Smiley can explain to him that Jadzia is Sisko ' s . Act Two . On Terok Nor , the Intendant is dismayed by the decreased productivity on the station . Garak insists he ' s doing all he can , but she takes him down to the processing center and orders gratuitous executions of Terran slaves as an incentive . suggests that she ' s been in a foul humor . . . ever since Captain Sisko was killed . The Intendant denies it , but she is clearly frustrated and Garak knows it . As the rebels are restless about the impending completion of the sensor array , a suspicious Jadzia is telling Sisko that she is tired of fighting the Alliance , after not seeing progress for a year . She ' s tired of living on the run , and says they ought to abandon the rebellion , as their group is not capable of winning . Sisko says he ' s not ready to give up , yet , and they must make sure Jennifer Sisko does not complete the sensor array . Later , with the whole group , Sisko insists ( over Bashir ' s objections ) that Jennifer ' s rescue , not her death , is their next objective . Bashir continues to argue , and , quietly during , O ' Brien suggests to Sisko that he hit him , as the other Sisko would . He quickly goes over and hits him just as he starts talking about his wife . He berates him for doing so , though Bashir and Dax remind him it would be much easier to kill her than to convince her to leave . O ' Brien reminds them that they need a scientist to help them counteract the Alliance ' s efforts . On Terok Nor , is on the station to inform the Intendant that Sisko is alive . . . and that he has information that will lead to Sisko ' s recapture . Act Three . Sisko and Smiley , in a fighter , soon become surrounded by " decloaking " Alliance ships en route to Terok Nor , captured , and taken to the station . The first thing Sisko does upon leaving the airlock is to kiss the Intendant passionately , and they briefly discuss the likelihood of his execution . Kira then moves onto O ' Brien and chastises him for betraying the Alliance . After Smiley explains that he did it because he wanted to be free , Kira contemptuously orders him sent back to Ore Processing , and she leads Sisko back to her quarters . Once there , she explains to him that since she can ' t trust him , it will be a matter of time before she needs to " dispose of " him . Later , Jennifer arrives , accompanied by Garak , who leaves no doubt as to his hatred of Sisko . After Garak leaves , Ben and Jennifer spar over Ben ' s bellicosity and womanizing , but Ben puts that to a stop by explaining that he ' s on the station to rescue her . Act Four . After more arguing , Ben uses the adversarial nature of their marriage as a wedge to suggest that she ' s working for the Alliance as a response to his leadership of the rebellion , and finally asks her to defect as an alternative to slavery . Sisko tells her to think about it , then uses a subdermal communicator to alert Smiley to his progress and disables the guards on the Intendant ' s quarters . Smiley creates a diversion to get himself and several slaves out of Ore Processing , while subduing a few guards in the process . With Ben guarding the door with two Klingon disruptor s , Jennifer ultimately agrees to follow him – though only after insisting that she " still " hates him – and the two of them meet up with Smiley and the ( former ) slaves in the Habitat Ring . They need to coordinate to subdue a few Cardassian soldiers , but they successfully reach the airlock where Rom ' s shuttle is docked , only to discover Rom ' s corpse hanging from the airlock door , by a dagger through the chest . Act Five . On the verge of being overpowered by the Intendant and her men and with no obvious means of leaving Terok Nor , the rebels head back to Ore Processing with Jennifer in tow . Once there , the rebels engage in a firefight with the guards , and after promising Jennifer that he will get her off the station , Sisko starts manipulating a console , explaining to Smiley that he hopes the designer of the Mirror Universe Terok Nor is the same Cardassian who designed Deep Space 9 . The Intendant and the troops with her ultimately force entry to the rebels ' haven in Ore Processing , where she orders the rebels ( excepting Jennifer ) killed – only to have Sisko tell her that doing so would be a mistake . . . because he has initiated the station ' s auto - destruct sequence . Thinking that he ' s bluffing , the Intendant points out to Sisko that he doesn ' t know the needed command authorization code , at which point he proves her wrong . When she tries to stop the sequence , she discovers that Sisko has " changed " the command code , and offers to let him off the station if he will give her the new code . He demands that he and his companions be let off the station first , and the Intendant capitulates , closing with an oath to Sisko that she will hunt him down . After the trip from Terok Nor to the rebel base , Jennifer insists on knowing who Ben " really " is . Commander Sisko tells her that she can ask Smiley for the details , and then the two of them say their goodbyes . Memorable quotes . " " Poor Morn . This is gonna break his hearts . " " " " Where are we ? " " " " I guess you could say we just stepped through the looking glass . " " " " I hope you don ' t run up against too many surprises . " " " " If I do , I guess I ' ll just have to . . . improvise . " " " " Logic isn ' t going to win us our freedom . We have to take action ! " " " " At least someone here is using his brain . " " " " You know , you did pretty good back there . I don ' t think anyone suspected you weren ' t Captain Sisko . At least , not once you hit Bashir . " " " " Whatever shall we do about O ' Brien ? " " " " If you need anyone to beat him into submission for you , " please " don ' t hesitate to call me . " " " " Do I get a vote ? " " " " Of course you do . It just doesn ' t count . " " " " Why don ' t you start by telling me what happened to my husband . He ' s dead , isn ' t he ? " " " " I ' m sorry . " " " " Don ' t be . " " Links and references . References . access code ; airlock ; Badlands ; bedroom ; bluff ; bribery ; Cardassian s ; cloaking device ; Constable ; Ferengi ; goldfish ; heart ; husband ; Intendant ; kiss ; Klingon s ; Klingon - Cardassian Alliance ; logic ; manual override ; massage ; mine ; ; Morn ; ODN processor ; ore processing ; ; paint ; pet ; pig ; pilot ; pirate ; productivity ; professor ; propaganda ; ; quarters ; quota ; revolution ; Romulan s ; Sector Command ; slavery ; storeroom ; subspace ; subdermal communicator ; ; Terran Rebellion ; theta ; tinkerer ; torture ; transpectral sensor array ; vole ; vole fighting ; vote ; witch ; workforce ( people )