Who Is Enigma ? " Choose wrong . . . and it ' s WAR ! " Summary . Fox beam s aboard the " Enterprise " and is greeted by Captain Kirk , who notes that it has been some time since their adventure on Eminiar VII . Kirk introduces his senior officers , Sulu , Saavik , Dr . McCoy , and Scott . While giving Fox a tour , Scott beams up the replacement crew members from Starbase 19 . The replacements include a variety of alien species , including an Andorian who has been replaced by an impostor . The ship sets course for Babel , the location of the conference . As Kirk makes the security arrangements , the Andorian shape - shifts into the form of Lieutenant Richardson , one of the security personnel and enters Fox ' quarters . It transforms into a strange tentacled creature , but the real security team arrives and fire phaser s at it before it can kill Fox . McCoy notes that the marks left are those of a Rigellian decapod , a creature extinct for a century . Kirk has Uhura send Sulu and Saavik to his quarters and open a channel to Commodore Benedit of the Federation Security Council . Benedict confirms the existence of a shape - shifting assassin named " Enigma " working for the Orion Victory League . It seems that he is using the same techniques as Garth of Izar , learned from the natives of Antos IV . Meanwhile , Fox finds a computer tape left by the creature from the Orion Victory League announcing his death . The voice and image are those of his daughter , Trisha . Kirk and McCoy encounter Saavik alone in a hallway and ask where Lt . Sherwood , her partner for this shift , is . Kirk also notes that she is carrying a meal , steak to be precise , and notes that Vulcan s are vegetarians . He tells McCoy to seize her since she must be Enigma , but McCoy ' s tricorder indicates that she is actually Saavik . She tells that she is half - Romulan , and thus the steak . Kirk and McCoy accept her explanation and continue on . She thinks that Surak must be watching over her because they believed her . In the transporter room , Fox prepares to transport down , and Kirk checks with Scott to ensure that no sabotage has occurred . He then says to Scott " Queen to Queen ' s level 3 " , the same phrase Scott used the previous time they encountered a shape - shifter . Scott expresses confusion and as phasers are aimed at him , transforms into a bird and flies into the transporter , heading to the planet . Fox calls out Trisha ' s name , arousing Kirk ' s suspicion . Kirk orders a search for Scott and finds out about Fox ' daughter . McCoy calls Kirk to Scott ' s quarters and points out the venom they have found , that of a Dimorian water - rat , venom that kills within 24 hours . On the planet , Fox meets with the Klingon ambassador , Kalor . Enigma watches them , but cannot make a move due to the protection around Fox . After the first round of discussions , Kirk beams down to talk to Fox and asks him about Trisha . Fox admits that they ' d fought and that she left home to join a revolutionary organization because she hated him . Kirk asks why she didn ' t kill him in his quarters when she had the chance . Fox tells Kirk that he ' d do anything to get her back . The conference continues , complete with a large assembly of gatherers . Kirk has Konom , the transporter chief , beam all of the security personnel into a matter stream , but not to re - energize them . With the hole in security , Enigma heads in , transforms into a Gorn and attacks . Kirk and his men arrive and Kirk attacks the Gorn and it transforms into a duplicate of him , completely identical , including to the tricorder . McCoy noted that he would simply inject both with Retinax V since the real Kirk was allergic to it . The impostor turned to run , but Saavik uses a Vulcan nerve pinch on him , disabling him . McCoy injects the drug , actually a neural paralyzer and Veritazine , a truth drug , and they discover Scott ' s location . Benedict demands to know what Kirk is doing , and he explains himself . Kalor tells Benedict that he is going to recommend Kirk for the Klingon Courage Medal for his actions . McCoy and Richardson find Scott , and McCoy injects him with Masiform - D , saving his life . Kirk tells Fox to talk with his daughter , and Fox agrees and heads off to try to start anew with her . Memorable quotes . " " Your job is to get Fox to Babel in one piece ! My boys don ' t need any ship - bound flatfeet to tell them what to do ! Is that " clear " ? " " " Perfectly " , sir . Kirk out . " " ( end communication ) " " Jackass ! There ' s intergalactic war at stake , and he wants to make sure his " boys " get all the " credit " ! " " " " You know , you are quite a " legend " among our warfleet , captain . " " " Am " I ? Would you happen to remember any of those legends , Mr . Ambassador ? " " Background information . References . Antos IV ; Babel ; cellular metamorphosis ; Eminiar VII ; Garth of Izar ; Gorn ; Masiform - D ; Retinax V ; Rigellian ; Surak