Fast National ratings for Thursday, Aug. 20, 2009.

FOX's telecast of an NFL preseason game between the Eagles and the Colts wasn't quite enough to win Thursday overall, but the pigskin action helped the network win the 18-49 demographic.

Among adults 18-49, FOX averaged a 2.5 rating, comfortably topping the 1.9 rating for CBS in the key demographic. NBC's 1.1 rating and the 1.0 rating for ABC left The CW in last with a 0.8 rating. 

Overall, though, CBS averaged an estimated 7.67 million viewers to go with a 5.1 rating/9 share, tops for the night. FOX was second with a 4.2/7. ABC's 3.0/5 was a distant third, topping the 2.3/4 for NBC. The CW trailed with a 1.4/2.

CBS started the night in first with a 4.7/8 for "Big Brother," which continued its mid-season momentum. ABC's "Who Wants To Be a Millionaire" had a 4.5/8, nipping the 4.1/7 for FOX's NFL telecast. NBC's "30 Rock" and "Parks and Recreation" was fourth, bettering a 1.4/2 for The CW's "Supernatural" (almost certainly inflated by live sports coverage in some markets, since repeats of "Supernatural" don't do that well on their own).

"CSI: Crime Scene Investigation" kept CBS on top in the 9 p.m. hour with a 5.1/9. FOX's NFL was second with a 4.4/7. ABC's "Grey's Anatomy" repeat held off the 2.1/4 for NBC's "The Office" and "30 Rock," while The CW's "Supernatural" stayed steady.

"The Mentalist" closed the night strongly for CBS with a 5.4/10. NBC's "Law & Order" was second with a 2.7/5, leaving ABC in last with "Private Practice."

 

All ratings information comes from preliminary Fast National Nielsen data, which includes live and same-day DVR viewing. All numbers are subject to change.