The Enterprise Incident ( episode ) Acting apparently restless and irrational , Captain Kirk inexplicably orders the " Enterprise " into Romulan space where the ship is quickly captured by the enemy and Kirk held captive aboard their flagship . Summary . Captain Kirk has been behaving irrationally of late , as noted in McCoy ' s medical log . Kirk then inexplicably orders helmsman Sulu to take the " Enterprise " across the Romulan Neutral Zone and into Romulan space , where it is quickly surrounded by the Romulan s – who are now using Klingon - style vessels . Act One . Kirk instructs Lieutenant Uhura to contact Starfleet Command and transmit all log entries . Sub - Commander Tal demands the immediate surrender of the " Enterprise " . Kirk says he will blow up the " Enterprise " if any Romulans attempt to take it . Tal tells Kirk that no one should have to choose quickly to die , and gives Kirk one hour to surrender the ship . If he does not , he and his crew ' s deaths are certain . In an exchange of hostages , Kirk and Spock transport aboard the Romulan vessel , where they meet Tal ' s superior , a female commander . Kirk is accused of invading Romulan space in an attempt to steal a newly developed cloaking device for study by the Federation . The commander points out that there are no methods to coerce a Vulcan to speak , but threatens to torture Kirk until he confesses his crime – or dies . Spock , however , testifies that Kirk was not under Starfleet orders ; he is mentally unstable and has ordered the " Enterprise " across the Romulan Neutral Zone for his own glorification . An enraged Kirk is taken to a holding cell . Act Two . The Romulan commander broadcasts a message to the " Enterprise " informing them of what has transpired . She orders the crew to have the " Enterprise " follow her to Romulus , where the crew will be processed and then released back to the Federation . Chief engineer Montgomery Scott retorts that he takes no orders except those of Captain James T . Kirk , causing the slightest of smiles to flicker across Kirk ' s face . Thereafter the Romulan commander attempts to persuade Spock to side with his Romulan " cousins , " take command of the " Enterprise " and accompany the commander back to Romulus . She wonders why an officer of his abilities was never given the opportunity to command , despite his 18 years of service to Starfleet . She says that Spock must have his own ship but he points out that it is she that needs a ship : the " Enterprise " . She admits that bringing the " Enterprise " to Romulus would be considered a great accomplishment . In the process , she attempts to woo him , which he finds moving to his Human – and emotional – side . Spock attempts to walk down the forbidden corridor , but respects the commander ' s wish that only loyal Romulans walk down it . Meanwhile , Kirk injures himself when he is transferred to a holding cell aboard the Romulan ship . McCoy beams aboard to examine him . McCoy reports to the commander that he is mentally incapacitated , which seems to corroborate Spock ' s testimony . She proclaims Spock to be the commander of the " Enterprise " . This leads to an altercation between Spock and Kirk , in which Spock uses the Vulcan death grip on him . McCoy pronounces Kirk dead . Act Three . Kirk is brought back aboard the " Enterprise " and is revived by McCoy ; the " death grip " is revealed to be a simple nerve block . Another truth is learned : Kirk and Spock are working under Federation orders to steal the cloaking device . Kirk asks McCoy to surgically alter him to appear Romulan . Nurse Chapel and Scotty are brought into the conspiracy . Meanwhile , the Romulan commander brings Spock to dinner . He notes that the food is much better on board than it is on the " Enterprise " , being a powerful inducement . They drink a blue beverage , followed by an orange colored beverage . She continues her promise that a place can be found for Spock in the Romulan Star Empire . She promises him that Romulan women , unlike Vulcan women , are not dedicated to pure logic and the sterility of non - emotion . She demands a token of his love : he must lead some Romulans on board the " Enterprise " and bring the ship to Romulus . He agrees , but asks that they wait an hour in her chamber before proceeding . She whispers her first name in his ear . Spock finds it a name incongruous with a Romulan soldier . The Romulan commander tells Spock that she will now " " transform into a woman , " " and goes off to change out of her uniform . Wearing the uniform from one of the Romulan prisoners , Kirk transports aboard the Romulan battle cruiser . While the Romulan commander is changing , Spock contacts Kirk with his communicator and speaks low . Spock reveals the location of the cloaking device . Their transmission is detected on the Romulan bridge and Sub - Commander Tal is alerted . While Spock and the commander proceed with their intimate time together , Kirk makes his way to the forbidden corridor . Sub - Commander Tal interrupts the commander and Spock , saying through the door that the matter is urgent . The commander reluctantly allows him to enter , where he informs her of the source of the alien transmission : right there , in the commander ' s chamber . Spock is discovered . All proceed urgently to the cloaking device . Kirk removes the cloaking device from its control panel and has Scotty beam him with it back to the " Enterprise " . Upon returning , Scott takes the device and installs it into the deflector shield from engineering . Back on board the Romulan ship , the commander confronts Spock ; she wonders who he is that he has done this . Spock replies , " " First officer of the " Enterprise " . " " She slaps him across the face upon learning of his betrayal of her . Spock asks what the Romulan ' s present form of execution is . Act Four . Kirk returns to the bridge with Romulan physiology ; however he appears , the crew is happy to see him . He quips that the reports of his death were premature . He orders Sulu to plot a course back home and for Chekov to man the sensor s to locate Spock . The commander learns of Spock ' s complicity in the scheme and prepares to have him executed . He asks for twenty minutes to exercise the Romulan Right of Statement . He begins that he is guilty of the charge of sabotage – but he had carried out his duty due to the fact that the Romulan cloaking device poses a threat to the Federation . Chekov locates Spock by using the sensors to isolate the Vulcan life sign s and establishes a transporter lock as Scotty finishes connecting the cloaking device . While making his final statement , Spock is beam ed back aboard the " Enterprise " – with the commander holding onto him . Brought to the bridge , the commander orders Tal to destroy the " Enterprise " , leaving Kirk to prepare to fight in case Scott is unable to activate the cloaking device . Scott succeeds , however , and " Enterprise " escapes with the Romulan commander . While escorting her to her quarters on Deck 2 , Spock tells the commander that he regrets that she was unwittingly brought aboard the " Enterprise " . He confesses that his only interest was the cloaking device when he came on board her ship , but now he tells her that his interest wasn ' t all pretend . She tells him the Romulans will soon develop a way to penetrate the cloaking field technology Starfleet now possesses . " " Military secrets are the most fleeting of all , " " he says . " " I hope you and I have exchanged something more permanent . " " The commander and Spock agree that what has passed between them will be their secret . Returning to the bridge , Spock takes command from Kirk , who leaves for sickbay to get his Human appearance restored by Dr . McCoy . Memorable quotes . " " Your language has always been most difficult for me , captain . Perhaps you have another word for it . " " " " There ' s a well - known saying – or is it a myth – that Vulcans are incapable of lying . " " " " It is no myth . " " " " It is unworthy of a Vulcan to resort to subterfuge . " " " " You ' re being clever , commander . That is unworthy of a Romulan . " " " " It is not a lie to keep the truth to oneself . " " " " I ' m betraying no secrets . The commander ' s suspicion that Starfleet ordered the " Enterprise " into the Neutral Zone is unacceptable . Our rapid capture demonstrates its foolhardiness . " " " " You filthy liar ! ! " " " " I am speaking the truth , for the benefit of the " Enterprise " and the Federation . I say now , and for the record , that Captain Kirk ordered the " Enterprise " across the Neutral Zone on his own initiative and his craving for glory . " " " " I ' ll kill you , you filthy traitor ! I ' ll kill you ! I ' ll . . . kill you ! ! " " " " This is Lieutenant Commander Scott . The " Enterprise " takes no orders except those of Captain Kirk and we will stay right here until he returns and if you make any attempt to board or commandeer the " Enterprise " , it will be blown to bits along with as many of you as we can take with us . " " " " You Humans make a brave noise . There are ways to convince you of your errors . " " ( to Spock ) " " Did you hear that , you coward ? ! You ' ve betrayed everything of value you ever knew ! Did you hear the sound of Human integrity ? ! " " " " I don ' t make house calls . " " " " It would be illogical to assume that all conditions remain stable . " " " " My neck feels like it ' s been twisted off . " " " " Well , you look like the devil himself . But as long as you ' re alive , what ' s it all about ? " " " " Just don ' t put me inside a bulkhead . " " " " Romulan women are not like Vulcan females . We are not dedicated to pure logic and the sterility of non - emotion . " " " " How rare , and how beautiful . But so incongruous when spoken by a soldier . " " " " Why would you do this to me ? What are you that you could do this ? " " " " First officer of the " Enterprise " . " " " " It ' s the biggest guess I ' ve ever made ! " " " " Commander , you ' ll forgive me if I put up a fight . " " " " Of course . It ' s expected . " " " " Military secrets are the most fleeting of all . I hope that you and I exchanged something more permanent . " " " " Captain , please go . Somehow , they do not look aesthetically agreeable on Humans . " " " " Well , are you coming , Jim ? Or do you want to go through life looking like your first officer ? " " Background information . Remastered information . " The Enterprise Incident " was the sixty - fourth episode of the remastered version of " The Original Series " to air . It premiered in syndication on the weekend of and aside from the standard CGI replacement footage of the " Enterprise " , this episode most notably featured several new effects shots of the Romulan battle cruiser . While the remastered scenes remain true to the original , two significant changes in the visual effects : the as the third surrounding vessel , and the addition Romulan " bird - of - prey " markings painted on the underside of the ship ' s hull . Links and references . References . 2250 ; autopsy ; back - up systems ; battle cruiser ; battle stations ; bobbing ; " Bones " ; bulkhead ; centurion ; class two signal ; cloaking device ; commander ; control central ; cosmetic surgery ; devil ; dinner ; disorientation ; doctor ; electronic clipboard ; espionage ; execution ; Federation Command ; Federation Council ; first name ; flank speed ; ; hostage ; house call ; insanity ; instrument failure ; kilometer ; Klingon design ; Klingon Empire ; log entry ; logic ; lying ; mentally depressed ; Milky Way Galaxy ; myth ; neck ; oath ; painting ; parsec ; persecution ; physician ; physiostimulator ; psychological profile ; red alert ; report ; Romulan s ; Romulan ale ; Romulan battle cruiser ; Romulan Neutral Zone ; Romulan Right of Statement ; Romulan Star Empire ; Romulan - Klingon Alliance ; Romulan uniform ; Romulus ; sabotage ; security room ; self - destruct ; sensor scan ; soldier ; starbase ; Starfleet Command ; Starfleet Intelligence ; state criminal ; sub - commander ; toast ; tracking sensor s ; transporter coordinate s ; treason ; treaty ; trespassing ; Vulcan s ; Vulcan death grip ; Vulcan dishes ; Vulcan neck pinch ; warrior race