CBS' 'CSI' Has Lowest-Rated Finale Ever

12:06 PM PDT 5/13/2011 by Marisa Guthrie

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Monty Brinton/CBS

Fox wins Wednesday with “American Idol” and “Bones,” while multiple series hit lows including ABC’s “Grey’s Anatomy.”

Fox easily won Thursday with the American Idol results show and Bones, averaging a 4.8 rating in the 18-49 demographic with 16.2 million viewers from 8-10 p.m.

Idol (6.2, 21.5 million) was down 2 percent week-to-week. But Bones (3.3, 10.9 million) won the 9 p.m. period, beating ABC’s Grey’s Anatomy (3.1, 9.3 million), which was down 11 percent for a series low.

Also hitting a nadir on Thursday night was CBS’ CSI finale (2.6, 11.4 million). Although the show was up double digits compared with its previous original, it was nonetheless CSI’s lowest-rated finale ever.

Meanwhile, NBC’s Community finale (1.4, 3.2 million) and a new episode of The Office (3.2, 6.2 million) dropped 7 percent and 9 percent, respectively, to tie series lows.

CBS was second for the night, averaging a 2.7 rating and 11.4 million viewers, followed by ABC (2.4, 7.3 million), NBC (1.9, 3.8 million) and Univision (1.5, 3.6 million).