When the series "ER" airs its finale on Thursday, the event will not only mark the completion of one of NBC’s most successful shows, but it can also be viewed as the end of an era for the network. “What’s so symbolic about ‘ER’ leaving is that that 10 o’clock Thursday night slot started out what I always called the beginning of the second golden age of television with ‘Hill Street Blues’,” said Robert Thompson, a professor and founding director of the Bleier Center for Television and Popular Culture at Syracuse University.
