CBS's "Big Brother 4" keeps getting bigger, attracting 10.29 million viewers, its largest audience of the summer as well as its highest rating among adults 18-49, according to final Nielsen ratings for Wednesday, August 27.

"Big Brother 4" (6.8/11, 10.29m), which has won its time period in adults 18-49 every broadcast this summer, averaged a series high 4.3/12 in adults 18-49, 5.0/13 in adults 25-54 and a 4.0/13 in adults 18-34, matching its best ratings in both those demographics.

CBS placed first on Wednesday in viewers (9.44m), adults 18-49 (3.2/10) and adults 25-54 (3.8/11). This marks CBS's fifth consecutive Wednesday victory in viewers and adults 25-54.