Nielsen ratings

Prime-time viewership, in millions, compiled by Nielsen for the week ending Feb. 17.

1. "Big Bang Theory," CBS, 17.89

2. "Person Of Interest," CBS, 14.87

3. "Two and a Half Men," starring Ashton Kutcher, above, CBS, 13.69

4. "American Idol" (Wednesday), Fox, 13.45

5. "American Idol" (Thursday), Fox, 12.59

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