Battle of Ceti Alpha V The Battle of Ceti Alpha V was a battle between the remnants of humanity and the Xindi in 2165 of an alternate timeline . Prelude . In 2153 , while chasing the Xindi weapon , Captain Jonathan Archer was infected with interspatial parasite s while trying to save the life of T ' Pol . As a result of the amnesia the parasites induce , Archer was rendered incapable of commanding and the Xindi destroyed the Earth in 2154 . The remnants of humanity , around 6 , 000 people , eventually settled on Ceti Alpha V while the Xindi hunted the galaxy for them . Determined to cure Archer , Doctor Phlox spent the next twelve years searching for a way . After learning that the only existing way to destroy the parasites would be to vaporize Archer in a subspace implosion , Phlox worked on developing his own treatment and came up with an antiproton beam powered by the " Enterprise " s warp core . The first use of the beam eliminated one of three clusters of the parasites in Archer ' s head in both the present and on all of the previous scans taken by Phlox . Phlox and T ' Pol come to realized that if they eliminated all of the parasites in the present , they would be eliminated in the past too , potentially altering the timeline for the better as Archer would never have been infected and could conceivably lead the " Enterprise " to victory over the Xindi . Before the treatments could resume , the " Enterprise " captured a Yridian spy who had informed the Xindi of the location of the remnants of humanity . Needing all power for the weapons , Captain Tucker ended the treatments and shortly afterwards , six Xindi ships were detected entering the system . ( ) Battle . engaged the six Xindi ships with phase cannon s . Though the ships returned fire , the new shields , provided by General Thy ' lek Shran held . The " Enterprise " broke off and was followed by an Insectoid and a Reptilian ship while the rest headed for the planet . As the two ships chased the " Enterprise " , they were attacked from behind by the " Intrepid " and another starship , disabling the Insectoid ship . The " Enterprise " then focused its fire on the Reptilian ship , knocking out its engines . The defeat of their two ships caused the four remaining Xindi ships to alter course to engage the three defenders . Under heavy attack , the " Enterprise " managed to destroy an Insectoid ship , but started taking damage itself with forward shielding going down to 52 % . An Insectoid and Reptilian ship targeted the " Intrepid " together , blasting off its port nacelle . With no other choice , Trip ordered them to retreat . The " Enterprise " then lost phase cannons to a hit . The forward shield collapsed and the " Enterprise " suffered hull breaches on B and C decks . With the forward shields down , the Xindi ships targeted the bridge and blasted the top off of it , killing the " Enterprise " bridge crew . As boarding parties beamed aboard the " Enterprise " , T ' Pol ordered Phlox to meet her and Archer in Engineering to complete his treatment since destroying the interspatial parasite s would alter the timeline . In Engineering , Phlox discovered that the chamber used in the treatment had been destroyed by debris and was unusable . Archer remembered Phlox telling him that the parasites could also be destroyed by a subspace implosion which would destroy the " Enterprise " as well , but they don ' t have another choice . Archer ordered T ' Pol and Phlox to flee in a shuttlepod while he overloaded three plasma injector s to create the implosion since the Xindi were only looking for Humans , but both refused . Discovering that one of the injectors had been damaged , Archer sent Phlox to get a replacement from a supply locker which he used to successfully replace the damaged injector . Overcoming nearby security teams , Xindi boarding parties entered Engineering and killed Phlox . T ' Pol started setting up the implosion as Archer laid down covering fire but was killed before she could finish . Archer took over , setting the controls on the warp core as he exchanged fire with the Xindi , taking several hits . With the last of his strength , Archer managed to trigger the subspace implosion moments before dying . The subspace implosion consumed the " Enterprise " , destroying the ship , its crew , the boarding parties , and the parasites . ( ) Aftermath . As hoped , the subspace implosion destroyed the interspatial parasite s in both 2165 and 2153 , resulting in Archer only suffering a concussion and no amnesia . Without the amnesia , Archer was able to remain in command of . ( )