"Seinfeld" was perhaps the last true television pop culture phenom to come out of the 20th century. To hear some people tell it, there was never a show like it before and there hasn't been one like it since. And unlike some other groundbreaking sitcoms I could name, "Seinfeld" is the rare example of a television gem that walked away before "jumping the shark," as they say. On the other hand, had it been up to NBC executives, Jerry Seinfeld would have come back for one more, possibly shark-jum...
