Thursday, February 21, 2013 ratings — New Episodes: Zero Hour, Grey’s Anatomy, Scandal, American Idol, Community, Parks And Recreation, 1600 Penn, The Big Bang Theory, Two And A Half Men, Person Of Interest, Elementary, The Vampire Diaries, and Beauty And The Beast. Episode Reruns: Law & Order: Special Victims Unit.

ABC
8pm – Zero Hour: 1.1 in the demo (-21% change) with 5.32 million.
9pm – Grey’s Anatomy: 3.0 in the demo (+7% change) with 8.54 million.
10pm – Scandal: 2.7 in the demo (0% change) with 7.62 million.

CBS
8pm – The Big Bang Theory: 5.4 in the demo (-2% change) with 17.35 million.
8:30pm – Two and a Half Men: 3.9 in the demo (+3% change) with 13.44 million.
9pm – Person of Interest: 2.9 in the demo (-3% change) with 14.13 million.
10pm – Elementary: 2.3 in the demo (0% change) with 11.05 million.

The CW:
8pm – The Vampire Diaries: 1.3 in the demo (+30% change) with 2.89 million.
9pm – Beauty and the Beast: 0.6 in the demo (+20% change) with 1.56 million.

FOX
8pm – American Idol: 3.9 in the demo (+5% change) with 13.50 million.

NBC
8pm – Community: 1.1 in the demo (-8% change) with 3.08 million.
8:30pm – Parks and Recreation: 1.3 in the demo (-13% change) with 3.03 million.
9pm – Parks and Recreation: 1.4 in the demo (+8% change) with 2.91 million.
9:30pm – 1600 Penn: 1.0 in the demo (-9% change) with 2.30 million.
10pm – Law & Order: SVU: (rerun) 1.1 in the demo with 3.86 million.

These are the fast affiliate ratings. The “demo” refers to the viewers in the 18-49 demographic. The percentages represent the change since the previous original episode. (Percentages aren’t given for reruns or specials.) “Million” refers to the total number of viewers.

To see past ratings for a particular show, click the show’s link. The show pages are updated with the daily final ratings when they become available. Those pages include percentage changes in both the demo and total viewership, in addition to season averages to date.

Here are the show season averages, grouped by network: ABC | CBS | CW | FOX | NBC

What were you watching last night? American Idol, Zero Hour, other new episodes, reruns, or something better?