was the winner of this round. On Day 76, Adam and Sheila competed against one another in the "Who's The Guinea Pig Now?" competition. For this, HouseGuests had to rotate a giant hamster wheel attached to their neck in an attempt to get a ball through a maze. Adam was the winner. On Day 77, Adam and Ryan competed in the "Jury Statements" final Head of Household competition. For this, HouseGuests had to attempt to finish a sentence made by the six members of the Jury of Seven. Ryan was the winner, thus became the final Head of Household. He then cast the sole vote to evict Sheila from the house. On Day 81, Adam was crowned the winner of Big Brother 9 in a vote of six to one. Episodes Voting history Couples Phase For the first three weeks, the HouseGuests competed as couples. Couples would win competitions and hold power together and would vote and be evicted together. On Day 28, the game reverted to the regular format with the HouseGuests playing as individuals. Notes Reception Ratings Big Brother 9 airs three episodes a week, with shows airing Sundays at 8p.m. (EST), Tuesdays 9p.m., and Wednesdays 8p.m. The live eviction show was moved to Wednesdays due to Survivor: Micronesia airing Thursdays 8p.m. This is the first season of Big Brother to air during an official television season, and the second to air concurrently with a season of Survivor. Big Brother 9 is also competing with Fox's American Idol on Wednesdays. The first episode of Big Brother 9 premiered on February 12, 2008 with 7.33 million viewers (4.6/7 viewing audience), down from last summer's 4.8/9 (7.4 million viewers) launch. U.S. viewing figures This is ratings information for the season. "Rating" is the estimated percentage of all televisions tuned to the show, and "share" is the percentage of all televisions in use that are tuned in. "Overnight Viewers" is the estimated number viewers that watched a program either while it was broadcast or watched via DVR on the same day the program was broadcast. "Live+7 Viewers" is the estimated number of viewers that watched a program while it was broadcast or via DVR within 7 days of original broadcast.. "Increase over Live" is the percentage of increase between the number of viewers who watched a program "Live" versus "Live+7". Unless otherwise cited, the overnight rating and share information comes from