Atthebeginningof2259,Ca tainJohnSheridanre lacesSinclairasthemilitarygovernorofthestation.HeandthecommandstafflearnthatthedeathofPresidentSantiagowasactuallyanassassinationmastermindedbyVicePresidentClark(whoassumedthePresidencyu onSantiago’sdeath).Aconflictdevelo sbetweentheBabylon5commandstaffandthePsiCor s,anincreasinglyautocraticorganizationwhichoverseesandcontrolsthelivesofhumantele aths.CommanderIvanova,thesecond-in-commandofthestation,issecretlyalatenttele athwhohasillicitlyavoidedregisteringwiththePsiCor s.TheShadows,anancientandextremely owerfulracewhohaverecentlyemergedfromhibernation,arerevealedtobethecauseofavarietyofmysteriousanddisturbingevents,includingtheattackontheNarnout ostattheendof2258.CentauriAmbassadorLondoMollariunknowinglyenliststheiraidthroughhisassociationwiththemysteriousMr.MordenintheongoingconflictwiththeNarn.TheelderlyandailingCentauriem eror,longanadvocateofreconciliationwiththeNarn,diessuddenlywhilevisitingBabylon5.Anumberofcons irators,includingLondoMollariandRefa,takecontroloftheCentaurigovernmentbyassassinatingtheiro onentsand lacingthelateem eror’sunstablene hewonthethrone.Theirfirstactistostarto enaggressionagainsttheNarn.Afterafull-scalewarbreaksout,theCentaurieventuallyconquerNarninabrutalattackinvolvingmassdrivers,outlawedwea onsofmassdestruction.Towardstheendoftheyear,theClarkadministrationbeginstoshowincreasinglytotalitariancharacteristics,clam ingdownondissentandrestrictingfreedomofs eech.TheVorlonsarerevealedtobethebasisoflegendsaboutangelsonvariousworlds,includingEarth,andaretheancientenemiesoftheShadows.TheyenlisttheaidofSheridanandtheBabylon5commandstaffinthestruggleagainsttheShadows