The first Thursday-night edition of Fox's American Idol this season posted a hefty 14.5 rating and a 22 share at 8:00 p.m., but -- for a change -- it was not the top-rated show of the night. (It did lead at 8:00 p.m.) That honor went, as usual, to ABC's Grey's Anatomy, which drew a 17.5/25 in the overnight ratings at 9:00 p.m. In the same hour, CBS's CSI: Crime Scene Investigation recorded a 14.1/20. The same hour saw Fox's The O.C. draw a 4.4/6, a 70-percent plunge from its Idol lead-in. At 10:00 p.m., an Oprah Winfrey Oscar interview special on ABC took over first place, recording an 11.8/19.