On FOX, it was business as usual for American Idol. On CBS, Rules of Engagement was down, when compared to the last original Monday episode, and CSI dropped 10%. Over on ABC, Wipeout saw a nice boost and, on NBC, 30 Rock got the biggest boost. The CW’s Vampire Diaries and Nikita experienced significant drops.

8pm
American Idol (120 min)
– 21.757 million viewers
– 11.9/19 HH
– 7.2/20 A18-49 (-5.3%)

The Big Bang Theory
– 12.349 million viewers
– 7.4/12 HH
– 3.8/11 A18-49 (+2.7%)

Wipeout
– 7.123 million viewers
– 4.0/6 HH
– 2.2/6 A18-49 (+15.8%)

Community
– 3.789 million viewers
– 2.3/4 HH
– 1.8/5 A18-49 (0%)

The Vampire Diaries
– 2.984 million viewers
– 1.7/3 HH
– 1.3/4 A18-49 (-7.1%)
– 1.4/5 A18-34
– 1.7/5 W18-34 (-19.0%)

8:30pm
Rules of Engagement
– 9.452 million viewers
– 5.7/9 HH
– 2.8/8 A18-49 (-12.5% vs last original Mon episode)

Perfect Couples
– 2.888 million viewers
– 1.7/3 HH
– 1.4/4 A18-49 (0%)

9pm
CSI
– 12.412 million viewers
– 7.6/12 HH
– 2.7/7 A18-49 (-10.3%)

Grey’s Anatomy (61 minutes)
– 9.131 million viewers
– 5.9/9 HH
– 3.4/9 A18-49 (-8.1%)

The Office
– 6.121 million viewers
– 3.5/5 HH
– 3.2/9 A18-49 (-3.0%)

Nikita
– 2.136 million viewers
– 1.2/2 HH
– 0.8/2 A18-49 (0%)
– 0.7/2 A18-34
– 0.8/2 W18-34 (-11.1%)

9:30pm
Parks and Recreation (29 minutes)
– 4.591 million viewers
– 2.7/4 HH
– 2.4/6 A18-49 (+9.1%)

10pm
The Mentalist
– 14.785 million viewers
– 9.0/16 HH
– 2.8/8 A18-49 (-6.7%)

Private Practice (59 minutes)
– 6.440 million viewers
– 4.5/8 HH
– 2.3/7 A18-49 (0%)

30 Rock
– 2.7/4 HH
– 2.3/6 A18-49 (+15.0%)

10:30pm
Outsourced
– 3.267 million viewers
– 2.0/4 HH
– 1.4/4 A18-49 (-6.7%)

Raw ratings data copyright Nielsen, courtesy Travis Yanan.