Njengoba kunikezwe indaba ka-1985 ethi Ukubuyela Esikhathini Esizayo, uMarty McFly wayengakugwema kanjani ukuvumelanisa unina noyise ukuze asindise ukuphila kwakhe?
Context:Ngo-1985, uMarty McFly osemusha wayehlala eHill Valley, eCalifornia, nonina owayecindezelekile futhi eyisidakwa, uLorraine; abafowabo abadala, abahlulekayo emsebenzini nasemphakathini; noyise othobekile, uGeorge, owayehlukunyezwa umphathi wakhe, uBiff Tannen. Ngemva kokuba iqembu lomculo likaMarty lihlulekile ukuhlolwa umculo, uthululela isifuba sakhe entombini yakhe, uJennifer Parker, ngokuthi wesaba ukufana nabazali bakhe naphezu kwezifiso zakhe.  Ngalobo busuku, uMarty uhlangana nomngane wakhe oyisazi sesayensi, u-Emmett "Doc" Brown, endaweni yokupaka izimoto esikhungweni sokuthenga saseTwin Pines. UDoc uveza umshini wesikhathi owakhiwe nge-DeLorean eguquliwe, enikwe amandla yi-plutonium ayiphange kubaphekula baseLibya. Ngemuva kokuthi uDoc efake isikhathi sokuya ngoNovemba 5, 1955 (usuku aqala ngalo ukucabanga ngento yakhe yokuhamba ngesikhathi), amaphekula afika ngokungalindelekile futhi amdubule. UMarty ubaleka nge-DeLorean, engahlosile eqala ukuhamba ngesikhathi lapho efinyelela kumamayela angu-88 ngehora (amakhilomitha angu-142 ngehora).  Lapho efika ngo-1955, uMarty uthola ukuthi akanayo i-plutonium yokuyibuyisa. Ngesikhathi ehlola iHill Valley ekhulayo, uMarty uhlangana nobaba wakhe osemusha futhi uthola ukuthi uBiff wayemhlukumeza uGeorge ngisho nangaleso sikhathi. UGeorge uwela emgwaqeni wemoto ezayo ngenkathi ebuka uLorraine osemusha eshintsha izingubo, kanti uMarty ulahlekelwa yingqondo ngenkathi emsindisa. Lapho evuka, uthola ukuthi uLorraine uyamnakekela, futhi yena uyamthanda. UMarty uyamlandela futhi uqinisekisa uDoc osemusha ukuthi uvela esikhathini esizayo, kodwa uDoc uchaza ukuthi okuwukuphela komthombo okhona ngo-1955 okwazi ukukhiqiza amandla adingekayo ekuhambeni kwesikhathi ngumbani. UMarty ubonisa uDoc ipheshana elivela esikhathini esizayo elibonisa isehlakalo sokushaywa umbani okwakuseduze enkantolo yomuzi. Njengoba izingane zakubo kaMarty ziqala ukufiphala esithombeni asithwele naye, uDoc uyabona ukuthi izenzo zikaMarty zishintsha ikusasa futhi zibeka ubukhona bakhe engcupheni; ULorraine bekumele anakekele uGeorge esikhundleni sikaMarty ngemuva kwengozi yemoto. Imizamo yokuqala yokwazisa abazali bakhe ihluleka, futhi uthando lukaLorraine ngoMarty luyajula.  ULorraine umema uMarty emdansweni wesikole, futhi uzama ukuzenza umuntu ongamfanele, avumele uGeorge ukuthi angenele futhi amsindise, kodwa uhlelo luhamba kabi lapho iqembu likaBiff livala uMarty ebhuthini lemoto yeqembu elenza lo msebenzi, ngenkathi uBiff eziphoqa kuLorraine. UGeorge ufika elindele ukuthola uMarty kodwa uhlaselwa uBiff. Ngemva kokuba uBiff elimaze uLorraine, uGeorge othukuthele uyamshaya aze angabe esazi lutho bese ehambisa uLorraine obongayo emdansweni. Iqembu likhulula uMarty emotweni yabo, kodwa umsiki wegitare oholayo ulimaza isandla sakhe kule nqubo, ngakho uMarty uthatha indawo yakhe, enza ngenkathi uGeorge noLorraine babelana ngokwanga kwabo kokuqala. Njengoba ikusasa lakhe lingasekho engozini, uMarty uya enkantolo eyohlangana noDoc.  UDoc uthola incwadi evela kuMarty emxwayisa ngekusasa lakhe futhi uyayiklebhula, ekhathazekile ngemiphumela. Ukuze asindise uDoc, uMarty ulungisa iDeLorean ukuze ibuyele emizuzwini eyishumi ngaphambi kokuba ashiye ikusasa. Imibani iyashayisa, ibuyisele uMarty emuva ku-1985, kodwa iDeLorean iyaphuka, iphoqa uMarty ukuba abuyele enxanxatheleni yezitolo. Ufika lapho kudutshulwa uDoc. Ngesikhathi uMarty elilela eceleni kwakhe, uDoc uhlezi phansi, eveza ukuthi wayihlanganisile inothi likaMarty futhi wayegqoke i-bulletproof vest. Uthatha uMarty ambuyisele ekhaya bese ehamba ngo-2015 esebenzisa i-DeLorean. UMarty uvuka ngakusasa ekuseni ukuze athole ukuthi uyise manje usengumbhali wezesayensi ophumelelayo futhi onokwethenjelwa, unina usesimweni esihle futhi ujabule, izingane zakubo ziphumelela, futhi uBiff uyisikhonzi esiphansi esisebenzela uGeorge. Ngenkathi uMarty ehlangana noJennifer, uDoc uvele ephinda avele kuDeLorean, ephikelela ukuthi babuyele naye esikhathini esizayo ukuze basindise izingane zabo ezinhluphekweni ezimbi.[a]
Wayengeke akwazi ukususa uyise endleleni lapho ewela endleleni yemoto eyayiza.