CBS POSTS ITS LARGEST THURSDAY AUDIENCE OF THE SEASON AND HIGHEST RATED IN KEY DEMOGRAPHICS

"CSI's" Nearly 31 Million Viewers Is Its Largest Audience Since Nov. 2004 (100th Episode)

"Survivor: Guatemala" Drives Past 20 Million Viewers, A Season Best

"Without a Trace" Hits Season Highs in Adults 18-49 and Adults 25-54

CBS delivered its largest Thursday audience of the season and highest rated in key demographics led by season high viewer deliveries for SURVIVOR: GUATEMALA and CSI and demographic highs for WITHOUT A TRACE, according to preliminary Nielsen ratings for Dec. 8.

SURVIVOR: GUATEMALA won its time period with an 11.7/18 with 20.38m viewers, 5.2/15 in adults 18-34, 7.0/18 in adults 18-49 and 8.8/21 in adults 25-54. For the third consecutive week, this is SURVIVOR: GUATEMALA's best delivery in households and viewers. This is also SURVIVOR: GUATEMALA's best adults 18-34 performance and second best adults 18-49 and adults 25-54 delivery.

CSI finished first in households (18.7/27), viewers (30.80m), adults 25-54 (13.0/28), adults 18-49 (10.6/25) and adults 18-34 (8.1/22). This is the best households and viewer delivery for CSI since 11/18/04 (the program's all-time high) and 5th best overall. CSI hit season highs in adults 18-49 and adults 25-54 and matched the season best deliveries in adults 18-34.

WITHOUT A TRACE won its time period in households (13.8/22), viewers (21.48m), adults 25-54 (8.7/20) and adults 18-49 (7.0/17). If the ratings hold, WITHOUT A TRACE hit season highs in both adults 18-49 and adults 25-54.

For the night, CBS was first in households (14.7/22), viewers (24.22m), adults 25-54 (10.2/23), adults 18-49 (8.2/21) and adults 18-34 (6.2/17). CBS posted season high deliveries for a Thursday in households, viewers, adults 18-34, adults 18-49 and adults 25-54.

Final ratings will be available this afternoon.