Season4,Episode1:FunRueee
　　OriginalAirDate—27September2007
　　MichaelaccidentallyrunsoverMeridithintheparkinglot,andhisguiltcauseshimtoorganizea5-Krunforher.DwightandAngelahaveafalling-outafterhekillshercat,andtheJimandPam'srelationshipisdiscovered.
　　Season4,Episode2:DunderMifflinInfinity
　　OriginalAirDate—4October2007
　　MichaelfeelsthreatenedwhenRyanreturnstotheScrantonofficetosharehisideasaboutthefutureofDunderMifflin.JimandPam'srelationshipissharedwiththeentireoffice,whileAngelaandDwight'srelationshipisontherocks.
　　Season4,Episode3:LaunchParty
　　OriginalAirDate—11October2007
　　TheDunderMifflinInfinitywebsiteislaunchingandMichaelisexcitedaboutgoingtothebiglaunchpartyinNewYorkwhileAngelaplansasatellitepartyfortheScrantonbranch.Meanwhile,Dwightcompetesagainstthewebsitetoseewhocansellthemostpaperinoneday.
　　Season4,Episode4:Money
　　OriginalAirDate—18October2007
　　AsJanrenovatesthecondo,Michaelconfrontshisgrowingdebteverywayhecan,whichincludespressuringhisemployeesforaloan.PamandJimspendanightoutonDwight'sfamilyfarm,nowabedandbreakfast.
　　Season4,Episode5:LocalAd
　　OriginalAirDate—25October2007
　　MichaeltriestomakealocalDunderMifflincommercialthatisbetterthantheonetheprofessionaladagencymadeforthem.Meanwhile,AndytriestoconfideinDwightabouthisnewrelationshipwithAngela.
　　Season4,Episode6:BranchWars
　　OriginalAirDate—1November2007
　　MichaelandDwighttrytoplayaprankonKaren,whoisnowmanageroftheUticabranch,aftershetriestostealStanleyfromtheScrantonoffice.Meanwhile,Pam,Toby,andOscarstarttheirownexclusiveofficebookclub.
　　Season4,Episode7:SurvivorMan
　　OriginalAirDate—8November2007
　　AfterMichaelisn'tinvitedtoacampingtripwithRyan,hesetsouttoprovethathecanbraveitoutinthewildernessbyhimself.Jim,whoisinchargeoftheofficewhileMichaelisgone,triestochangethebirthdaypartypolicy.
　　Season4,Episode8:TheDeposition
　　OriginalAirDate—15November2007
　　MichaelisputinanawkwardpositionwhenJansuesDunder-Mifflinforwrongfulterminationandheisdeposedasawitness.Meanwhile,KellybeginssmacktalkingPamafterDarrylbeatsJimatpingpong.
　　Season4,Episode9:DinnerParty
　　OriginalAirDate—10April2008
　　MichaelinvitesJimandPamandAndyandAngelatoacouples-onlydinnerparty,whichmakesDwightveryjealous.However,theonlythinghe'smissingisaringsideseattowitnessMichaelandJan'sextremelydysfunctionalhomelife.
　　Season4,Episode10:ChairModel
　　OriginalAirDate—17April2008
　　KevinandAndyteamuptoreclaimthestolenDunder-Mifflinparkingspaces,whichforcesthemintoashowdownwiththeotherfivebossesoftheofficepark.Meanwhile,Michaelbecomesfascinatedbyawomenmodelingchairsinacatalog.
　　Season4,Episode11:NightOut
　　OriginalAirDate—24April2008
　　MichaelandDwighttotoNewYorktopartywithRyan,whoishavinglotsofpersonalandprofessionalproblems.Therestoftheofficeemployeesworklate,andwindupgettinglockedinthebusinesspark.
　　Season4,Episode12:DidIStutter?
　　OriginalAirDate—1May2008
　　MichaeltriestofigureouthowtorespondtoStanley'sinsubordinationduringameeting,andDwightbuysAndy'svehicleandimmediatelyflipsitformoremoney.
　　Season4,Episode13:JobFair
　　OriginalAirDate—8May2008
　　Dunder-Mifflinparticipatesinahighschooljobfair,butfewstudentsareinterested.Jim,Andy,andKevinplayaroundofgolfwithaprospectiveclient.Backattheoffice,everyonebutDwightandAngelaleavefortheday.
　　Season4,Episode14:Goodbye,Toby
　　OriginalAirDate—15May2008
　　Michaelthrowsanextravagantgoing-awaypartyforToby,andfallsinlovewiththewomanwhoisreplacinghim.JimplanstoproposetoPamattheparty,butgetsout-staged.Backatcorporate,Ryanisarrestedforfraud.