According to the final Nielsen ratings, the Wednesday, August 6 episode of "Big Brother 4" posted the program's highest adult 18-49 and adult 25-54 ratings of the series run and was most watched "Big Brother 4" episode on any night this summer.
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"Big Brother 4" (9-10 PM) won its time period in households (6.3/11), viewers (10.21m), adults 25-54 (5.0/14), adults 18-49 (4.1/12), women 25-54 (5.8/15) and men 25-54 (4.3/12). "Big Brother 4" was the night's top rated program in adults 18-49 and adults 25-54 for the second consecutive week. This was the program's highest rated episode in adults 18-49 and adults 25-54 and was the most watched episode to date.