Season two of Seinfeld, an American television series created by Jerry Seinfeld and Larry David, began airing on January 23, 1991, on NBC. Because of the commencement of the first Gulf War, the second season's premiere was postponed one week. The season comprised 12 episodes, and concluded its initial airing on June 26, 1991. It introduced a number of characters who played significant roles in later episodes, such as Jerry's Uncle Leo and Jerry's neighbor Newman. Filming of the show moved from Hollywood to Studio City, Los Angeles. One episode, "The Bet", remained unfilmed, as it was considered too provocative by the network, as well as several cast and crew members. Two new writers joined the writing staff, Larry Charles and Peter Mehlman, who would continue to write for the show in later seasons. Even though season two started out with poor ratings, bringing the season to a two-month hiatus, the rest of the season was positively received by critics and was nominated for three Primetime Emmy Awards. A Seasons 1 and 2 DVD box set was released by Sony Pictures Home Entertainment in the United States and Canada on November 23, 2004, 13 years after it completed broadcast on television. In addition to every episode from the two seasons, the DVD release features bonus material, including deleted scenes, inside looks, bloopers, and commentaries. Four million copies of the DVD were sold by the end of the year, making it one of the best-selling DVDs of all time. TV Guide ranked it as the sixth-greatest TV season ever made.