Fast National ratings for Friday, March 9, 2012.
 
A special airing of an original episode of "The Mentalist" was Friday night's most watched program, boosting 9 p.m. ratings for CBS and combining with "Undercover Boss" and "Blue Bloods" to give the network an easy primetime sweep in all key measures.
 
Among adults 18-49, CBS won Friday with a 2.0 rating, topping ABC's 1.4 rating and the 1.3 rating for NBC. FOX was fourth with a 1.1 rating, while The CW averaged a 0.4 key demo rating.
 
Overall, CBS won even more handily with an average of 11.04 million viewers and a 6.9 rating/12 share for Friday night. NBC was a distant second with a 3.4/6 and 5.08 million viewers, beating ABC's 3.1/5 and 4.72 million viewers. FOX averaged a 1.8/3 and 2.83 million viewers. The CW drew 1.15 million viewers and a 0.8/1.
 
8 p.m. - "Undercover Boss" started primetime in first for CBS with 10.02 million viewers and a 2.2 rating among adults 18-49, both up from last week. ABC's "Shark Tank" was down from last week and finished second with 5.38 million viewers and a 1.5 key demo rating. After last week's odd bump, NBC's "Who Do You Think You Are?" came back to Earth with 5.05 million viewers and a 1.0 key demo rating. A repeat of "Kitchen Nightmares" averaged 2.67 million viewers and a 1.0 key demo rating. And on The CW, a "Nikita" repeat averaged 1.15 million viewers and a 0.3 key demo rating.
 
9 p.m. - Airing away from its normal Thursday home, "The Mentalist" averaged 11.83 million viewers and a 2.0 rating among adults 18-49, which is either better than any "CSI: NY" (or "A Gifted Man") performance in that slot this year, or well below what "The Mentalist" does on Thursday. NBC's "Grimm" slipped a bit against the procedural competition and averaged 5.15 million viewers and a 1.5 key demo rating for second. ABC was third with 4.21 million viewers and a 1.2 key demo rating for "Primetime: What Would You Do?" FOX's second "Kitchen Nightmares" repeat averaged 2.99 million viewers and a 1.2 key demo rating. The CW's "Supernatural" repeat averaged 1.16 million viewers and a 0.4 key demo rating.
 
10 p.m. - CBS' "Blue Bloods" averaged 11.265 million viewers and a 1.8 rating among adults 18-49, barely boosted by the enhanced lead-in. NBC's "Dateline" averaged 5.03 million viewers and a 1.4 key demo rating, beating the 4.55 million viewers and 1.3 key demo rating for ABC's "20/20."
 
All ratings information comes from preliminary Fast National Nielsen data, which includes live and same-day DVR viewing. All numbers are subject to change.
Dan-feinberg-med
A long-time member of the TCA Board and a longer-time blogger of "American Idol," Dan Fienberg writes about TV, except for when he writes about movies or sometimes writes about the Red Sox. But never music. He would sound stupid talking about music.