(Editor's Note: CBS had preemptions/delays due to NFL pre-season football in Boston. With the NFL on FOX and these preemptions, ratings for CBS and FOX are tentative and subject to change.)

BIG BROTHER THURSDAY delivered its largest audience of the summer and highest adult 18-49 and adult 18-34 ratings, according to Nielsen preliminary live plus same day ratings for Aug. 18.

BIG BROTHER THURSDAY was second in households (4.8/08), viewers (7.97m), adults 25-54 (3.4/09), adults 18-49 (3.0/08) and adults 18-34 (2.5/08), all behind FOX's preseason football.  BIG BROTHER THURSDAY posted Thursday season highs in households, viewers, adults 18-49, adults 18-34 and matched adults 25-54 Thursday highs.

Updated Thursday ratings will be available this afternoon.

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Press Contacts:            

Ed Harrison            818-655-1584       ed.harrison@cbs.com

Jeremy Murphy      212-975-4577       jeremy.murphy@cbs.com