Impulse ( episode ) After finding the drifting hull of a Vulcan cruiser inside an asteroid field , Captain Archer and his crew are surprised to find Vulcans " alive " on it . When they are stranded there , they must find out what happened to the crew before T ' Pol succumbs to the same fate . Summary . Teaser . Archer is carrying T ' Pol ' s body into sickbay . " " She ' s coming to ! " " he shouts to Phlox . As they place her on the biobed , they restrain her , just as she regains consciousness . She briefly strangles Archer and threatens to kill , calling him a liar when he says they are not trying to hurt her . Phlox applies the last restraint as T ' Pol lets out an ear - splitting scream . . . Act One . Phlox tries to sedate T ' Pol , who thinks the doctor is trying to kill her , like they " " killed the others " " . Archer holds her head still as T ' Pol calls them murder ers and Phlox applies the sedative . T ' Pol struggles briefly , but the sedative takes effect , as Phlox sends the biobed into the imaging chamber . On the bridge , T ' Pol recognizes the transponder frequency . It is from the Vulcan cruiser " Seleya " , a ship that entered the Expanse nine month s previously . They set a course . In the asteroid field , Archer is pilot ing the manually . MACO F . Hawkins makes up the fourth member of their away team . Two of the asteroids collide , sending bits of rubble on to the hull of the small craft . Reed says they may need a fresh coat of paint when they return . T ' Pol offers to take the helm . " " Maybe on the way back , " " Archer replies . He then finds out from T ' Pol that she served on the " Seleya " for over a year , as a deputy science officer under Captain Voris . It was her last assignment before joining the Vulcan consulate on Earth . The " Seleya " was charting the thermobaric perimeter when they reported being caught in a subspace eddy . They were eventually pulled in to the Expanse , and were never heard from them again . The " Vaankara " was sent to find them . " " You already know what happened to that crew , " " says T ' Pol . Tucker and Travis Mayweather are transporting some of the smaller asteroids on to the ship , in an attempt to get some trellium . Tucker aims for something bigger , but as they energize transporters , an anomaly passes over it , and the transporter circuit s become fused . The asteroid dematerializes , then rematerializes as small pieces , practically phased in to the transporter alcove . Mayweather says that with transporters down , he can land on one of the asteroids in a shuttlepod , even though it is risky . Tucker looks back to the transporter . " " This ' ll be a new one for the maintenance crew , " " he says , before leaving with Mayweather . " " arrives at the Vulcan cruiser , which has taken quite a beating . Main power is off - line , life support is at a minimum , and T ' Pol detects bio - sign s . Archer tries to contact them , but again gets no response . They dock at the starboard docking port . Reed is the first one on board , followed by Archer , T ' Pol and Hawkins . Reed discovers a smattering of a blue compound on a bulkhead , and finds out that it is trellium . T ' Pol ' s scanner picks up some biosigns on their deck , but it can ' t isolate them . They split into pairs . Reed and Hawkins go starboard . They find Vulcan blood on another bulkhead , next to a computer terminal . Archer and T ' Pol hear a knocking , and head towards a jammed door . Picking up a single biosign , T ' Pol tries the override to the door ' s control panel and succeeds . When the door opens , a Vulcan , with a deteriorated and sickly appearance wielding a blunt weapon , nearly striking T ' Pol . Archer wrestles him to the ground , where the Vulcan crewman scratches his face . Now standing up , T ' Pol shoots him , but he does not fall to the ground . Next she kicks him , before Archer downs him with another shot . Act Two . T ' Pol is leaning against the door , recovering from the shock . As they start moving the Vulcan crewman to the shuttlepod , two more crewmen wielding the same weapons walk towards them . Again , it takes two phase - pistol shots to down them . Archer contacts Reed , who has not run into anyone yet . As soon as they stop talking , Reed and Hawkins are attacked . Hawkins is downed , while Reed keeps firing at the Vulcans heading towards them . Eventually getting up , Hawkins uses his stun baton to defend himself , as Reed himself is attacked . One of the Vulcans puts his weapon around Reed ' s neck , intent on strangling him , but he is saved by Archer , who shoots the Vulcan down . More Vulcans are converging on their position , so Archer suggests they retreat , as the other Vulcans begin to rise . Hawkins sets his weapon to kill , which T ' Pol notices . T ' Pol , then Archer , order him to switch back to stun , as there is still a chance the Vulcans could be rescued . The team get back to the docking port , but they are blocked by two Vulcans , who just stand there , staring coldly and almost hatefully at them . Archer tries to talk to them , but they seal the hatch , giving them no access to the shuttlepod . The rear door opens , revealing three Vulcans , one of them being armed a welding tool and firing at point blank range . They are downed by several shots , as even more crewmen approach . The team moves away from the area , up a ladder leading to the next deck . Archer is the last one to go up , and the Vulcans grab him as he climbs . Fighting them off , he gets up the ladder and closes the hatch . The Vulcans on the other side begin banging . Archer tries to contact " Enterprise " , to no avail . T ' Pol believes they can contact " Enterprise " from the bridge if their com system is intact , but there is one slight problem – the bridge is seven decks above them . If the whole crew is still alive , there will be 1 47 Vulcans on board . Malcolm suggests using one of the Vulcan shuttles , but the bay has decompressed . The four bulkheads leading to their own shuttle have been sealed . They decide to press on . As Hawkins is badly injured , they decide to go to the " Seleya " s sickbay , which is just two decks up . T ' Pol tells Archer that she may be succumbing to the same thing that is affecting the Vulcan crew , so Archer tells her he ' ll get her out of there as soon as possible . Tucker and Mayweather are in " Shuttlepod 2 " , looking for a large asteroid with plenty of trellium near the surface . " " There isn ' t a flat spot much bigger than my quarters , " " says Mayweather , but Tucker gives him the choice . He takes the opportunity . Hitting a small outcropping and then skidding to a halt , Mayweather asks the chief engineer not to write up that particular landing in his log . " " Are you kidding ? " " he replies . " " I ' m gonna recommend they give you a medal . " " They set out . Archer and his team have reached the " Seleya " s sickbay . They are almost surprised when yet another Vulcan jumps down from above , but Reed has it covered , shooting the man before he hits the floor . As Reed patches up Hawkins ' wound , Archer asks about the man lying in the isolation pod . T ' Pol is slowly losing her grip on her emotion al control . She tells Archer that the man on the biobed is called Solin , and that he is the chief engineer . When T ' Pol asks him questions , he doesn ' t answer , but only struggles to break free from his restraints . She eventually shouts at him , causing her to recoil when Solin again doesn ' t answer . She knows that she is losing control and believes that it is too late to save her . Archer reassures her , and with a steady hand on her shoulder , calms her down enough to continue . Moving through an access tube , T ' Pol struggles to keep moving . When they come out , they find a lot of debris blocking their way . Archer and Reed squeeze through , telling Hawkins to look after T ' Pol , while they proceed towards engineering and the two biosigns they have just picked up . Hawkins gives T ' Pol some water , before apologizing for his earlier actions . He asks how the crew could have become so violent when they don ' t have emotions . T ' Pol corrects him on a common misconception – they do have emotions , but they are kept suppressed and under control . She relates Vulcan ' s past to their present situation . Vulcans used to be extremely violent , and they nearly destroyed themselves . Archer and Reed go through the access tube next to engineering , but as they open the hatch . . . there is no - one there . Archer climbs out , before being promptly attacked by two Vulcans who had hidden themselves at the side . Reed takes one out with his particle rifle , and Archer punches the other one . Calling T ' Pol and Hawkins to them , they continue . On one of the asteroids , Tucker and Mayweather have collected a whole box with trellium ore . Mayweather remembers about the " accident " that Tucker and T ' Pol had in the lab while trying to synthesize trellium - D . Suddenly , the asteroid shakes as a spatial anomaly strikes . Sato contacts them to tell them that the asteroid has changed course and is headed into a denser area of the field . They look up as they see a particularly large asteroid moving towards them . Act Three . Tucker and Mayweather board " Shuttlepod 2 " and Mayweather launches it . The two large asteroids collide , sending small pieces at them . They only have one thruster left , but Mayweather can get them back to " Enterprise " . Inside the " Seleya " s engine room , Archer ' s team find out that the transceiver has been damaged . T ' Pol is in a very fragile state , but remains calm for long enough to tell Archer what needs to be done . Reed has encrypted the locking mechanism on the doors but he doesn ' t know how long it ' ll hold . In the launch bay , Tucker , Mayweather and an engineering crew are working on repairs to " Shuttlepod 2 " . Tucker is contacted by Sato , who is receiving a transmission from the captain . Archer asks if they can go and pick them up , but it ' ll be a few hour s before " Shuttlepod 2 " is ready to go again . Archer says he ' s sending some biodata that he wants Phlox to analyze , before terminating the comm link . Tucker tells his men to get a repair team . On the " Seleya " , T ' Pol has rerouted the bulkhead controls to engineering . Reed has finished realigning the actuator circuit s , and as T ' Pol puts her hand into an access port , she gets a shock . Angry , she throws the circuits at Reed and Archer . She then accuses them of undermining her work when Archer and Tucker looked over the Xindi starchart s without her . Archer tells her they are all going to get off the ship , safely . Reed suggests causing an overload in the " Seleya " s power grid that would override all systems , including the bulkhead mechanisms . T ' Pol says that with the warp core being unstable , it would probably shut down antimatter containment , causing a reactor breach . Archer says there isn ' t any other choice . Backing off , T ' Pol draws her phase - pistol on Archer , as Hawkins and Reed point their rifles at her . Reed notices , and informs Archer , that T ' Pol ' s phase - pistol is set to kill . T ' Pol thinks Archer is trying to get revenge on the Vulcans , who undermined his father ' s work , among other things . Archer reiterates : they ' re on a rescue mission . T ' Pol doesn ' t believe him . Archer asks her why would they keep their weapons on stun if they were trying to kill the Vulcans . There is a bang at the door , and as everyone turns , Archer seizes the moment . Disarming T ' Pol , he then grabs his own phase - pistol and points it at T ' Pol . In " Enterprise " s sickbay , Phlox and Tucker are analyzing the bioscan s . They have found out that trellium is the cause of the Vulcan crew ' s symptoms . Tucker notes that T ' Pol hasn ' t shown any signs of trellium exposure , but Phlox guesses that it is because she has not been near large quantities of it . Unfortunately for the crew of the " Seleya " , they had the misfortune of wandering into an asteroid field loaded with the compound . Trellium - D has become a potent neurotoxin to the Vulcan nervous system , and it is stopping them from controlling their emotions . In a corridor , two Vulcans open a panel and pull out an actuator . Archer is talking to Phlox about the condition of the Vulcans . T ' Pol can yet be treated but the " Seleya " s crew is beyond help . T ' Pol thinks that Phlox is lying . Suddenly , communication is cut off , and the compartment is being filled with hexafluorine gas . Act Four . The Vulcan crew is attempting to gain access to engineering as Archer ' s team is trying to escape . They can ' t shut off the gas . Reed activates the overload as the team leaves through an access tube above them . As they walk along the corridors , the Vulcan ship begins its slow path to destroying itself . T ' Pol tries to escape from Archer ' s care , but he stops her . Continuing , they find a rather large obstacle – part of the floor is missing , and the gap is significant . If they miss the jump , they will fall several meter s to their certain death s in space . They find a piece of framework , and throw it over the gap , so they can cross over . Archer asks T ' Pol to go over with him but she refuses . As she is about to attack him , Archer stuns her , and lifts her over his shoulder , making his trip a lot more dangerous . He makes it however , as the ship rocks around him . Suddenly , the Vulcan crew appears , and Reed and Hawkins become occupied . Reed sends Hawkins across , but some Vulcans come from the side and almost pull him off . Archer and Hawkins get the bulkhead open slightly , as Reed attempts to cross the gap , firing all the time . He jumps the last part , before getting rid of the framework and sending another Vulcan plunging to his death . Finally back in " " , Archer ' s team find that the docking clamp s are locked . They have just moments before the ship explodes . Then they are hailed – it is " Shuttlepod 2 " , which frees them by firing phase cannon s at the docking clamps . Both ships then race away from the cruiser as it explodes . Tucker has collected over sixty kilogram s of trellium , and it should be enough to cover the forward hull . As Phlox could take a while in finding an inoculation for T ' Pol , Archer orders Tucker to put the trellium in a bio - hazard locker in cargo bay 1 . In sickbay , T ' Pol is recovering . She is informed of the " Seleya " s destruction and Tucker ' s efforts getting the trellium . T ' Pol wishes to be left on the next habitable planet , but Archer disagrees . It is Tuesday night : movie night . Phlox , with a big bowl of popcorn , is discussing the film with Tucker . They are trying to solve the mystery out loud , much to T ' Pol ' s chagrin . She tells them to use logic more quietly . He gives Phlox the " that ' s not fair ! " look , as the film stops . Archer calls the crew to their stations , for a tactical alert . T ' Pol walks down a corridor by herself , rather quickly . She suddenly slows however , when she hears something behind her . She turns , then , ignoring it , turns back as someone walks right past her . She enters the turbolift , and a " Seleya " crewmember appears next to her , attacking her . She walks out on to the deck , which has an eerie red glow , and is acting like one of the " Seleya " s corridors . She is grabbed by several Vulcans who push her to the ground . . . she hears Phlox call " " T ' Pol ! " " and wakes up in sickbay , hyperventilating . She looks up and sees yet another Vulcan , before sitting up straight and being held by Phlox . He calms her down and says that she is safe . Her breathing slows , and she lies back down on the biobed , scared by what could happen next . Memorable quotes . " " There ' ll be plenty of time for movies after we ' ve dealt with the Xindi . " " " " No damage , though we may need a fresh coat of paint ! " " " " I hope you won ' t write that landing up in your log . " " " " Are you kidding ? I ' m gonna recommend they give you a medal . " " " " I can ' t try to save Humanity without holding on to what makes me Human . " " " " Part of the fun of a mystery is trying to solve it before it ends . . . using logic . You of all people should appreciate that . " " " " Then use logic more quietly . . . " " Links and references . 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