Ratings Chart Attack!

Season-high performances from new episodes of “CSI” and “Eleventh Hour” on CBS helped the network win Thursday night in both viewers 18-49 and total viewers.

CBS wrapped up Thursday with an average 4.5/12 in the 18-49 demographic (15.8 million viewers), according to preliminary Nielsen Media Research numbers.

A new episode of “CSI,” which introduced Laurence Fishburne as a series regular as William Petersen’s Gil Grissom departs, drew a 5.7/14 (20.6 million), reaching a new high for the season and taking the top spot for the night. The episode’s strong performance (along with repeats on ABC), helped a new episode of “Eleventh Hour” draw its biggest audience to date in total viewers (13.4 million), averaging a 3.8/10 in the 10 p.m. hour. A new episode of “Survivor” (4.1/11, 13.2 million) gave CBS the top spots in each prime-time hour.

New episodes of comedies and “ER” brought NBC to second place (3.4/9, 7.7 million) for the night. A holiday episode of “The Office” drew a 4.8/12 (8.8 million) and was the No. 2 show for the night across the broadcast networks. “My Name Is Earl” (2.7/8, 6.6 million) and “Kath & Kim” (2.4/7, 5.3 million) were on par with season averages, as were “30 Rock” (3.8/9, 7.5 million) and “ER” (3.4/9, 8.9 million).

ABC took third for the night with an average 1.7/4 (5.4 million), due to a round of reruns of “Ugly Betty” (1.5/4, 5.4 million), “Grey’s Anatomy” (2.1/5, 6.4 million) and “Private Practice” (1.4/4, 4.5 million), which moved to its new time period.

Fox came in fourth for the night (1.6/4, 5 million), with “Secret Millionaire” (2.0/6, 5.4 million) performing lower than its two previous Wednesday-night telecasts. “Are You Smarter Than a 5th Grader?” did a 1.2/3 (4.6 million) in the 9 p.m. hour.

The CW placed fifth (0.8/2, 2.2 million) with repeats of “Smallville” (0.9/3, 2.5 million) and “Supernatural” (0.7/2, 2 million). The network pulled a 0.9/3 among viewers 18-34.

—Sergio Ibarra