Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Nolan ya yi wahayi zuwa fim din ne littafin Joker na farko a cikin 1940, littafin zane-zane na 1988 The Killing Joke, da kuma jerin 1996 The Long Halloween, wanda ya sake bayyana asalin Two-Face. An fara amfani da sunan "Dark Knight" ga Batman a Batman # 1 (1940), a cikin labarin da Bill Finger ya rubuta. An yi fim din Dark Knight da farko a Chicago, da kuma wasu wurare da yawa a Amurka, Ingila, da Hong Kong. Nolan ya yi amfani da kyamarorin fim na IMAX 70 mm don yin fim wasu jerin abubuwa, gami da farkon bayyanar Joker a fim. Warner Bros. da farko ya kirkiro kamfen tallan bidiyo mai yaduwa don The Dark Knight, haɓaka shafukan yanar gizo na talla da tirela waɗanda ke nuna hotunan allo na Ledger a matsayin Joker. Ledger ya mutu a ranar 22 ga Janairu, 2008, 'yan watanni bayan kammala fim din da watanni shida kafin a saki fim din daga haɗuwa mai guba na magungunan ƙwayoyi, wanda ya haifar da hankali sosai daga manema labarai da jama'a masu zuwa fim.  Tambaya: A cikin sararin samaniya na Batman an gabatar da Joker a shekarar da ta gabata?
Shekaru na 1940