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Sin was a nightclub located in Courthouse Square in 1985A. The entrance of the club replaced the entrance of the Lawrence Building. It avertised "XXX" and "NUDE". On Saturday, October 26, Marty McFly encountered Red the Bum near the entrance of Sin, where two prostitutes and a customer discussed.
Behind the scenes
- The elaborate set for Courthouse Square in the 1985A "Biffhorrific" timeline is visible on screen for only 60 seconds in Part II, between the time Marty steps across the remains of the welcome sign, and notices the Biff Tannen Museum. Many of the details were not evident in the film, but a set of photos on the Blu-ray edition of the trilogy show some locations of 1985A.