ANOTHER DOMINATING THURSDAY WIN FOR CBS

"CSI" Tops ABC, NBC and FOX Combined in Viewers and Key Demographics

"Survivor: Guatemala" Also Tops Combined Competition in Viewers and Adults 25-54 and Nearly in Adults 18-49

Nearly 20 Million Viewers Appear "Without a Trace"

CBS scored another dominating Thursday victory, placing first by a wide margin in viewers, adults 18-49, adults 25-54 and adults 18-34, according to preliminary Nielsen affiliate ratings for Oct. 20.

SURVIVOR: GUATEMALA won its time period with a 10.5/17 with 17.71m viewers, 4.1/13 in adults 18-34, 6.1/17 in adults 18-49 and 7.4/19 in adults 25-54. SURVIVOR beat ABC, NBC and FOX combined in viewers (vs. 17.39m), adults 25-54 (vs. 7.1) and nearly beat the three networks combined in adults 18-49 (vs. 6.3).

CSI finished first in households (17.3/26), viewers (27.52m), adults 25-54 (11.2/25), adults 18-49 (9.3/24) and adults 18-34 (7.2/21). CSI beat ABC, NBC and FOX combined in viewers (vs. 17.29m), adults 25-54 (vs. 8.4), adults 18-49 (vs. 7.5) and adults 18-34 (vs. 6.1).

WITHOUT A TRACE won its time period in households (13.5/22), viewers (19.91m), adults 25-54 (7.5/18) and second in adults 18-49 (6.2/16). WITHOUT A TRACE beat "ER" by +39% in households (vs. 9.7/16), +1% in adults 25-54 (vs. 7.4/18) and by +5.38m viewers (vs. 14.53m).

For the night, CBS was first in households (13.7/22), viewers (21.71m), adults 25-54 (8.7/21), adults 18-49 (7.2/19) and adults 18-34 (5.3/16).

Final Thursday ratings will be available this afternoon.

[EDITOR'S NOTE: What follows is the afternoon update with the final national Nielsen ratings.]

ANOTHER DOMINATING THURSDAY WIN FOR CBS

"CSI" Tops ABC, NBC and FOX Combined in Viewers and Key Demographics

"Survivor: Guatemala" Also Tops Combined Competition in Viewers and Adults 25-54 and Nearly in Adults 18-49

Nearly 20 Million Viewers Appear "Without a Trace"

CBS scored another dominating Thursday victory, placing first by a wide margin in viewers, adults 18-49, adults 25-54 and adults 18-34, according to final national Nielsen ratings for Oct. 20.

SURVIVOR: GUATEMALA won its time period with a 10.5/17 with 17.78m viewers, 4.1/13 in adults 18-34, 6.1/17 in adults 18-49 and 7.5/19 in adults 25-54. SURVIVOR beat ABC, NBC and FOX combined in viewers (vs. 17.30m, +3%), adults 25-54 (vs. 7.4/18, +1%) and nearly beat the three networks combined in adults 18-49 (vs. 6.3/18).

CSI finished first in households (17.7/27), viewers (28.48m), adults 25-54 (11.7/26), adults 18-49 (9.7/24) and adults 18-34 (7.4/21). CSI beat ABC, NBC and FOX combined in viewers (vs. 17.52m, +63%), adults 25-54 (vs. 8.5/19, +38%), adults 18-49 (vs. 7.5/19, +29%) and adults 18-34 (vs. 6.2/18, +19%). CSI is Thursday's top rated program in households, adults 18-34, adults 18-49 and adults 25-54 and the night's most watched program.

WITHOUT A TRACE won its time period in households (13.4/22), viewers (19.82m) and a strong second in adults 25-54 (7.4/18, -0.1 behind NBC) and adults 18-49 (6.1/16). WITHOUT A TRACE beat "ER" by +37% in households (vs. 9.8/16) and by +5.12m viewers (vs. 14.70m).

For the night, CBS was first in households (13.9/22), viewers (22.07m), adults 25-54 (8.9/21), adults 18-49 (7.4/19) and adults 18-34 (5.4/16).