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本·普拉特,佐伊·达奇,安娜·肯德里克,迪伦·奥布莱恩,布兰特妮·斯诺,瑞恩·墨菲,比妮·费尔德斯坦,露西·宝通,理查德·E·格兰特,比利·艾希纳,布莱克·詹纳,朱迪斯·赖特,凯思琳·加拉格尔,迈克尔·帕克,茱莉亚·施莱弗,本杰明·贝奈特,本·理查森（摄影）,马克·普拉特,本吉·帕塞克,凯西·塞雷尔,贾斯廷·保罗,马克斯·谢尔顿,史蒂文·莱文森,艾利克斯·蒂姆伯斯,Javier,Morgado
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斯凯勒·吉桑多,卡拉·海沃德,文森特·卡塞瑟,Tristan,Harris,Sophia,Hammons,Catalina,Garayoa,Barbara,Gehring,Chris,Grundy,Tim,Kendall,Aza,Raskin,Justin,Rosenstein,Shoshana,Zuboff,Rashida,Richardson,Renee,DiResta,Vic,Alejandro
Britain’smostnotoriousserialkiller,DennisNilsen,confessedtokilling15peoplein1983.Overafive-yearperiod,hepickedupvulnerableyoungmen,luredthembacktohishomeandstrangledthem,beforedisposingoftheirbodiesunderthefloorboards.Thetruthabouthowandwhyhekilledhasbeenthesubjectofmuchspeculationinbooksanddocumentariesoverthedecadessince.Now,withuniqueaccesstoawealthofpersonalarchiveleftinhiscellafterhisdeath,includingover250hoursofnever-before-publishedcassettetapesofhisprivaterecordings,thisfilmwilltakeusintoNilsen’sworld.FromayoungboygrowingupinaquietScottishfishingvillagetoacold-bloodedmurdererprowlingthestreetsofLondon.Setagainstthebackdropof1980sBritain,whenmassunemploymentdrewyoungmentoLondoninsearchoftheirfortunes,onlytofindthemselvesdestituteandeasyprey,andweavingtogetherinterviewsfrompolice,journalists,survivors,bereavedfamilies,and-forthefirsttime-thekiller’sownvoice,thisfeaturelengthdocumentaryexploreshowNilsenwasabletogetawaywithmultiplemurdersandattacks,unchallenged,forfiveyears.