Fast National ratings for Friday, Sept. 21, 2007

ABC doubled up on "20/20" Friday and scored a ratings win in the process.

For the night, ABC averaged a 4.2 rating/8 share. CBS finished second at 3.8/7. NBC, 3.1/6, came in third, while The CW took fourth with a 2.7/5. FOX, which once again saw its unscripted series "Nashville" struggle, trailed with a 2.2/4.

ABC also got a win among adults 18-49, drawing a 1.9 rating in the demographic. CBS and The CW tied for second at 1.4. NBC averaged 1.2 and FOX 1.1.

A "Ghost Whisperer" repeat, 3.7/7, won the 8 p.m. hour for CBS. ABC grabbed second with "America's Funniest Home Videos." FOX got a 3.0/6 from "Are You Smarter Than a Fifth Grader?," beating out NBC's "1 vs. 100" for third. "Friday Night Smackdown!" earned a 2.4/5 for The CW.

The first half of a two-hour "20/20" scored a 4.4/8 for ABC at 9 p.m. CBS dropped one spot to second with a rerun of "The Unit," 3.4/6. "Smackdown!" moved up to third, narrowly beating "Las Vegas," 3.0/6, on NBC. "Nashville" managed only a 1.3/3 for FOX.

At 10 p.m., "20/20" improved to 4.9/9 for ABC. "Numb3rs" posted a 4.4/8 for CBS, and a "Law & Order: SVU" rerun on NBC came in at 3.7/7.

Ratings information is taken from fast national data, which includes live and same-day DVR viewing. All numbers are preliminary and subject to change.