screen above and behind them, while lip-synching their character's lines. Still in limited release in , some years after its premiere, it is the longest-running theatrical release in film history. In many cities, live amateur shadow-casts act out the film as it is being shown and heavily draw upon a tradition of audience participation. The film is most often shown close to Halloween. Today, the film has a large international cult following and has been considered by many as one of the greatest musical films of all time. In 2005, it was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant." Plot The film begins with a pair of floating disembodied lips welcoming the audience to a science fiction double feature. Throughout the film, a criminologist from an unspecified point in the future narrates and provides commentary on the events. Following the wedding of their friends, a naïve young couple, Brad Majors and Janet Weiss, get engaged and decide to celebrate with their high school science teacher Dr. Scott, who taught the class where they first met. En route to Scott's house on a dark and rainy night, they get lost with a flat tire. Seeking a telephone to call for help, the couple walk to a nearby castle where a party is being held. They are accepted in by the strangely dressed inhabitants, led by the butler Riff Raff, the maid Magenta, and a groupie named Columbia, who dance to "The Time Warp". Despite feeling apprehensive, they stay to meet the owner of the castle, Dr. Frank-N-Furter. He invites them to stay for the night. With the help of Riff Raff, Frank brings to life a tall, muscular, handsome blond man named Rocky. As Frank vows he can improve Rocky into an ideal man in a week, a delivery boy named Eddie (half of whose brain Frank had used in the creation of Rocky) breaks out of a deep freeze riding a motorcycle. Frank kills Eddie with an ice axe, justifying it as a "mercy killing". Rocky and Frank depart for the bridal suite. Brad and Janet are shown to separate bedrooms, where each is visited and seduced by Frank. Meanwhile, Riff Raff and his sister Magenta torment Rocky. Janet, upset and emotional, sees Brad smoking a cigarette in bed with Frank on a video monitor.