Thursday, March 21, 2013 ratings — New Episodes: Wife Swap, Grey’s Anatomy, Scandal, American Idol, Glee, The Vampire Diaries, Beauty And The Beast, Community, and 1600 Penn. Sports: 2013 NCAA Basketball Tournament. Episode Reruns: The Office and Law & Order: Special Victims Unit.

ABC
8pm – Wife Swap: (season debut) 1.7 in the demo with 5.00 million.
9pm – Grey’s Anatomy: 2.9 in the demo (+12% change) with 9.11 million.
10pm – Scandal: 2.7 in the demo (0% change) with 8.57 million.

CBS
8pm – 2013 NCAA Basketball Tournament: (sports) 1.6 in the demo with 4.70 million.

The CW:
8pm – The Vampire Diaries: 1.2 in the demo (+9% change) with 2.55 million.
9pm – Beauty and the Beast: 0.7 in the demo (+40% change) with 1.77 million.

FOX
8pm – American Idol: 2.8 in the demo (-10% change) with 11.65 million.
9pm – Glee: 2.0 in the demo (0% change) with 5.89 million.

NBC
8pm – Community: 1.1 in the demo (0% change) with 3.02 million.
8:30pm – 1600 Penn: 0.9 in the demo (-10% change) with 2.49 million.
9pm – The Office: (rerun) 0.9 in the demo with 2.31 million.
9:30pm – 1600 Penn: 0.8 in the demo (-11% change) with 2.29 million.
10pm – Law & Order: SVU: (rerun) 1.1 in the demo with 4.22 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? Some original episodes, reruns, or something better?