ThePsiCorpsandPresidentClark，whosegovernmenthasdiscoveredShadowvesselsburiedinEarth \'ssolarsystem，begintoharnessthevessels \'advancedtechnology.TheClarkadministrationcontinuestobecomeincreasinglyxenophobicandtotalitarian，andusesamilitaryincidentasanexcusetodeclaremartiallaw.ThistriggersawarofindependenceonMars，whichhadlonghadastrainedpoliticalrelationshipwithEarth.Babylon5alsodeclaresindependencefromEarth，alongwithseveralotheroutlyingEarthAlliancecolonies.Inresponse，theEarthAllianceattemptstoretakeBabylon5byforce，butwiththeaidoftheMinbari，whohavealliedwiththestationagainstthegrowingShadowthreat，theattackisrepelled.BecomingconcernedovertheShadows \'growinginfluenceamongsthispeople，CentauriambassadorLondoMollariattemptstosevertieswiththem.Mr.Morden，影子樂隊\'humanrepresentative，由Mollari sm的工程人員在blameonarivalCentauriHouse Openwarfare突破之前的陰影和由巴比倫5和Mi nba領導的盟軍之間的rickthmintorestoringestoringpartnership裡。 జెనెట్icmanipulationbytheVorlonsisthesourceofhumantelepathy，asitislaterdiscoveredthatShadowshipsarevulnerabletotelepathicattacks.DispleasedattheVorlons \'lackofdirectactionagainsttheShadows，CaptainJohnSheridanbrowbeatsVorlonambassadorKoshNaranekintolaunchinganattackagainsttheirmutualenemy.Kosh \'sdeedsleadtohissubsequentassassinationbytheShadows.FormerstationcommanderJeffreySinclairreturnstoBabylon5toenlisttheaidofCaptainSheridan，Delenn，IvanovaandMarcusinstealingtheBabylon4spacestationandsendingit1,000yearsbackintimetouseitasabaseofoperationsagainsttheShadowsinthepreviousMinbari-Shadowwar.UndergoingthesametransformationasDelennattheendofSeason1，SinclairtransformsintoaMinbariandissubsequentlyrevealedtobetheactualValenofMinbarilegend，ratherthanareincarnation.Spurredbythereappearanceofhisassumed-deadwife（whonowworksfortheShadows），SheridantravelstoZ \'హ\'దమ్，theShadowhomeworld， inanattemptbythemt但是，它卻破壞了阿米爾阿米爾阿米爾阿米爾阿米爾阿米爾阿米爾阿米爾