As the ratings have rolled in for the first three weeks of the new television season, one question has dominated the conversations inside the industry's executive suites: what the heck is going on? Network executives are baffled by a season unlike any seen before. Returning hit shows like "Friends" and "E.R." are losing significant numbers of viewers from previous years. New shows have performed far worse than almost anyone expected, a result capped off Monday night when the Fox network started two shows that had received huge promotional pushes during the baseball playoffs, "The Next Joe Millionaire" and "Skin," and...