A six-hour movie. An Ingmar Bergman retrospective. And an Italian film that UW-Cinematheque director Jim Healy calls “the king of the difficult films.” In other words, the spring 2016 UW-Cinematheque series is not for moviegoers who want to go back to see “Ride Along 2” a second time to catch all the plot points they didn’t understand the first time. The free on-campus film series shows independent, foreign and classic films that otherwise would not likely make it onto the big screen in Madison … The series kicks off at 7 p.m. Friday at 4070 Vilas Hall, 821 University Ave., with the Madison premiere of the documentary “Hitchcock/Truffaut.”