Serpico
Tony Manero (John Travolta) in Saturday Night Fever and Dirk Diggler (Mark Wahlberg) in Boogie Nights have one major thing in common: They both have posters of Al Pacino as Serpico on their bedroom walls. As the real-life NYPD detective whose integrity cost him virtually everything (and almost cost him his life), Pacino became one of the icons of gritty, realistic 1970s filmmaking.
