Why nine? According to the May issue of Vanity Fair, Seinfeld finds it significant that he was born in '54 (5 + 4 = 9), graduated high school in '72 (7 + 2 = 9) and first appeared on The Tonight Show in '81 (8 + 1 = 9). Seinfeld � which airs Thursdays at 9�p.m./ET (NBC) � will leave the air on May�14 after airing 180 episodes (1 + 8 + 0 = 9).
Pretty cool huh?
Oh, since Seinfeld is ending at 180 episodes, that means that the final episode is 1 hour 30 minutes long, which is 3 separate 30 minute episodes when it is recycled in syndication. This weeks new episode, The Bookstore, is episode 173. There are 6 new episodes left including the final episode (8 if you break the finale into 3 parts)