The 2002-03 TV season came to a close Wednesday night and CBS crossed the finish line as the most-watched network. NBC came in second, followed by ABC, Fox, the WB and UPN. Among adults 18-49, NBC was once again tops, but Fox — fueled by reality phenoms Joe Millionaire and American Idol — ranked a strong No. 2. CSI, meanwhile, replaced Friends as the country's most popular show.