The Big Brother 4 house is down to its final two houseguests following last night's eviction of Robert, which was witnessed by a record audience of 11 million viewers, according to final Nielsen ratings for Wednesday, Sept. 17.

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Only Alison and Jun now remain with the winner of Big Brother 4 to be determined in next Wednesday's (9-10 PM, ET/PT) finale.

Big Brother 4 Wednesday (9-10 PM) won its time period in viewers (10.99m), adults 25-54 (5.1/12), adults 18-49 (4.2/12) and was second in adults 18-34 (4.0/13).

Big Brother 4 Wednesday was the night's top rated program in adults 18-49 and adults 25-54 (tie) for its 11th consecutive broadcast (since its premiere in July). This is the top-rated Big Brother 4 broadcast on any night this summer in households and adults 25-54, matches the best adults 18-34 delivery, the second best adults 18-49 rating and had its largest audience of any night this summer.