S07E05: "The Great Stink"
Emily and Richard are delighted when Lorelai and Christopher attend Friday night dinner together as a couple. Christopher reveals that Sherry has written him a letter saying she regrets leaving their daughter, G.G., and asking him to send G.G. to visit her in Paris. Lorelai can't believe that Chris would consider this and they get into an argument over dinner. Logan returns to town on business to acquire an internet company and pays Rory a surprise visit. Rory is thrilled, but during a dinner with Logan's colleagues, she realizes that she has no connection to his new business world, and is especially threatened by one of his beautiful co-workers. Meanwhile, Stars Hollow is plagued by a terrible odor when a train with a full load of pickles derails, and Taylor refuses to pay for the cleanup.