Invasive Procedures ( episode ) A desperate Trill tries to steal the Dax symbiont . Summary . Teaser . The crew evacuates to avoid an impending plasma storm , leaving a skeleton crew . Jadzia Dax has the ready in case of emergencies . Miles O ' Brien and Odo are checking the station and are at the docking ring . A loud banging reveals Quark hiding in one of the ports . He goes back to the bar , but they don ' t see a device on the wall beeping as they leave . Act One . While monitoring the storm and securing the station , the crew receives a distress call claiming to be from a cargo ship called " Ekina " . O ' Brien and Odo meet them , but the crew is hostile . A timid Trill named Verad and his crew ( a pair of Klingon mercenaries , T ' Kar and Yeto , and former prostitute Mareel ) surprise them . T ' Kar directs the takeover , forcing Odo into a locked box , and capturing O ' Brien and Bashir , but not before forcing Bashir to put the box in stasis in the infirmary . The group then goes to Ops and captures the rest of the crew . In the corner , O ' Brien realizes Quark probably had a hand in them getting around the security measures and notes this to Sisko . Yeto goes to Quark ' s bar and makes it clear he is not going according to the plan Quark understood ( a business transaction ) , and brings him to Ops under guard . There , Verad , again timidly , states he wants the symbiont . Act Two . Verad explains he is bitter because he applied to be " joined " and was rejected after a lifetime of preparation . He targeted the Dax symbiont specifically , as it is the most compatible for him , and furthermore plans to escape to the Gamma Quadrant . Bashir attempts to refuse to perform the procedure , but Verad shoots O ' Brien , making it clear he will hurt everyone there if he does not . He allows Bashir to tend to O ' Brien briefly , and Jadzia submits in order to prevent further harm , even though it will kill her within hours . Yeto then escorts them to the infirmary , leaving Mareel and T ' Kar . Verad forces Bashir to transfer the symbiont into his body while he ' s awake , using a neuro - electrical suppressor , and demands a monitor to watch the procedure . Bashir reluctantly puts Jadzia to sleep , asking for forgiveness . Yeto watches as Bashir performs the operation successfully , asking forgiveness from Jadzia . In Ops , the crew waits and has a quiet conversation . Demanding silence , T ' Kar starts a scuffle and O ' Brien is attacked . Mareel subdues Kira and gets the upper hand with a phaser . Later , Kira gets Mareel to talk . She informs them she knew Verad a long time ago and he helped her out of a bad situation , and that she loves him . She doesn ' t believe Sisko ' s point that a joined Trill is an entirely different person then before , and that she will lose him . At that point , Verad Dax appears . Act Three . Bashir has Yeto act as a nurse as he tries to save Jadzia ' s life . Yeto resists , trying to get a rise out of Bashir , but does help him . She wakes up feeling very alone . He promises to save her , and tells her to rest . Meanwhile , Sisko tries to coax his old friend ( Verad now has the memories of both Jadzia and Curzon Dax ) into setting things right , first by recalling memories going back to when they first met , but eventually mentioning discovering the Bajoran wormhole , one of Jadzia ' s memories . This gives him pause , but he says it ' s too late , that the integration is already happening and the symbiont is too weak to undergo the procedure again . He then justifies it by saying he wants to benefit many worlds in the Gamma quadrant with his knowledge , including Jadzia ' s memories . Mareel questions why Verad is entertaining the conversation at all and gets a snap retort from Verad – she begins to realize how much he has changed , but continues to remain loyal to him . Sisko realizes Verad intends to let Jadzia die , and ends their friendship abruptly . This affects Verad . Act Four . Verad ' s group waits the storm for safe passage to the wormhole . Meanwhile , Mareel attempts to give O ' Brien a Senarian egg broth to help him with his strength , which he reluctantly accepts . Mareel looks up to Verad , who is thinking alone , and Sisko again tries to convince her he ' s changed more than she realizes . She stays loyal , but the talk gets heated . Seeing this , Verad comes out from Sisko ' s office , but she assures him everything is fine . Just then , Quark attacks T ' Kar , and pretends to be injured so he is taken to the infirmary . Verad orders Mareel to take him down . There , Quark squeals and signals to Bashir to " run some further tests . " Mareel leaves Yeto alone with him and Bashir , giving the two their opportunity . Bashir knocks him out , and Quark cracks the lock on the container Odo is in , noting its Delgorian locking mechanism . Mareel goes to Verad and they plan their escape . Verad wants to ensure she is safe , however , when Mareel mentions them being together , he is reluctant to reciprocate . Now , Mareel is doubtful . Once Verad realizes Yeto is subdued , he guesses that Odo is free and immediately heads for his ship with T ' Kar . He takes Kira as a hostage just in case . Mareel wishes him luck , staying behind . Verad bids Sisko farewell , wishing they could stay friends , but Sisko promises him they ' ll be seeing each other again . This stuns Verad a bit , but he leaves . Act Five . Sisko goes to Mareel again , asking about the rendezvous since he knows it will never happen . She ' s now convinced Verad lied to her about the rendezvous , which he has never done , and finally accepts that the " new " Verad is no longer the man she loves . Sisko promises that he will save both Verad and Jadzia by removing the symbiont from one and replacing it in the other . Mareel relents and surrenders her phaser and communicator , but promises to kill Sisko if Verad is not brought back alive . He believes her . By the time Verad reaches his ship , Odo has released the docking clamp s , leaving him stranded . Verad runs when he sees Odo , leaving T ' Kar to be overpowered by Odo and Kira . Verad heads for a different runabout in a neighboring airlock , but runs into Sisko and the two have a stand off . Believing that Sisko will not shoot his old friend in fear of harming the symbiont , Verad begins to walk away , but Sisko shoots him anyway , declaring , " " Don ' t call me Benjamin . " " Fortunately , Bashir successfully reverses the symbiont ' s host , and Verad wakes up without it . He is very shaken up , despite Mareel ' s devotion and her promise that she will never leave his side . Meanwhile , Jadzia wakes up on the next table and gratefully embraces Sisko . She confides that the symbiont ' s brief contact with Verad has given her his memories - " " and it ' s all so sad " . " Even though the procedure has been reversed , Verad is now part of the Dax symbiont forever . Memorable quotes . " " He couldn ’ t find a cup of water if you dropped him in a lake but , even if he is an idiot , he ’ s still my brother . " " " " I ’ ve struck the sails and battened the hatches , so to speak . " " " " The Empire is governed by doddering fools and frightened old women who aren ’ t worthy of the name “ Klingon . ” " " " " It ’ s such a pleasure doing business with Klingons . " " " " Either you help me , or you and your friends will die . " " " " Thank you , Doctor . I feel better already . " " " " It ' s a gift . " " " " She let herself be slaughtered like a mindless t ’ gla . If she wanted to live , she should have fought back . " " " " Don ' t call me Benjamin . " " Links and references . References . Andorian redbat ; Anastasia ; auricular lobe ; Bajoran wormhole ; Cardassian s ; Cliffs of Bole ; communications clerk ; consulate ; contusion ; ; ; ; ; Delgorian locking mechanism ; delta - wave inducer ; docking ring ; " Ekina " ; endorphin ; Federation ; Ferengi ; Gamma Quadrant ; Kela ; Khefka IV ; Klingon s ; Klingon Empire ; Klingonese ; Kustanovich ; latinum ; liquid data chain ; ; malleus ; neuroelectrical suppressor ; ; Pelios Station ; Promenade ; Quark ' s ; runabout ; runabout pad ; security grid ; Senarian egg broth , skeleton crew ; spitting ; Starfleet ; Symbiosis Evaluation Board ; Trill ; ( planet ) ; Trill symbiont