TheBigBangTheoryisanAmericansitcomcreatedbyChuckLorreandBillPrady¡£SetinPasadena,California,theshowiscenteredonfivecharacters:tworoommateCaltech£¨¼ÓÖÝÀí¹¤£©geniuses,experimentalphysicistLeonardHofstadterandtheoreticalphysicistSheldonCooper;theirneighboracrossthehallPenny,anattractiveblondewaitressandaspiringactress;andLeonard'sandSheldon'sequallygeekyandsociallyawkwardco-workersandfriendsHowardWolowitz,anAerospaceengineerandanon-PhDfromJPL,andRajeshKoothrappali,aparticleastrophysicistpostdocalsoworkingatCaltech.LeonardisanexperimentalphysicistwithanIQof173whoreceivedhisPh.D.whenhewas24yearsold.HesharesanapartmentwithcolleagueandfriendSheldonCooper.ThewritersimmediatelyimpliedapotentialromancebetweenhimandneighborPenny,andtheirsexualtensionisafrequentlyexploreddrama.sheldon£ºOriginallyfromEastTexas,hewasachildgeniuswhobegancollegeattheageof11(aftercompletingthefifthgrade),startedgraduatestudiesat14,andearnedhisfirstPh.D.at16.Atheoreticalphysicistfocusingonstringtheory,hepossessesamaster'sdegree,twoPhDs,andanIQof187.Heexhibitsastrictlyroutinedlifestyle;alackofunderstandingofirony,sarcasm,andhumor;heisalsouninterestedinmanyoftheromanticthingsbetweenLeonard,Howard,andRaj.Thesecharacteristicsarethemainsourcesofhishumorandthebasisofanumberofepisodes.SheldonsharesanapartmentwithLeonardHofstadter,acrossthehallfromPenny,andreliesonbothforadviceinsocialsituations.Penny¨CSheistheattractiveblonde,bornandraisedinOmaha,Nebraska,wholivesacrossthehallfromSheldonandLeonard.Shehopesforacareerinacting,andhasbeentocastingcallsandauditionsbuthasnotbeensuccessfulsofar.Topaythebills,sheisawaitressatTheCheesecakeFactory.(funnyfact:Duringthefourthseason,Cuocobrokeherleginahorse-ridingaccident.Whenshereturnedtotheshow,aftermissingtwoepisodes,shewasshownworkingasabartenderattheCheesecakeFactory,insteadofinhernormalemploymentasawaitress.Hercastwasconcealed,andnomentionoftheunseenbrokenlegwasmade.Õâ¸öÄã¿ÉÒÔµ±ÓÐȤµÄÄ»ºó½²¸ø´ó¼ÒÌý¡££©HowardWolowitz,M.Eng.¨CHeworksasanaerospaceengineer.HeisJewish,andliveswithhismother.Hisfatherleftwhenhewas11,and,sofar,hehasneverlearnedwhy.UnlikeSheldon,Leonard,andRaj,HowardlacksaPh.D.Hedefendsthisbypointingoutthathehasamaster'sdegreeinEngineeringfromMITandhisdesignsarebuiltandlaunchedintospace,unlikethepurelyabstractworkofhisfriends.Heclaimsthathecanspeakseverallanguages,althoughintruth,hecan't.RajeshKoothrappali,Ph.D.¨CRajesh,whooriginallycomesfromNewDelhi,India,worksasaparticleastrophysicistatCaltech.Heisveryshyaroundwomenandisphysicallyunabletotalktothemunlesshedrinksalcohol(orthinkshehasbeendrinkingalcohol).However,hehashadmuchbetterluckwithwomenthanhisoverlyconfidentbestfriendHoward.Hisparents,Dr.andMrs.V.M.Koothrappali,areseenviawebcam.