puzzle by lifting the women into the air through a harness, while the men ran the puzzle pieces to them. Matt & Natalie were the winners of the Power of Veto. On Day 24, the HouseGuests learned that sometime in the coming weeks an alarm would go off in the house, and this meant that a twist would occur. On Day 25, Matt & Natalie chose to use the Power of Veto to remove themselves from the block, with Adam & Sheila being nominated in their place. On Day 28, Allison and Ryan were announced as the fourth couple to be evicted from the house in a unanimous vote of two to zero. Before they could exit the house, however, the alarm went off, and the HouseGuests learned that they were officially playing the game as individuals. The HouseGuests then learned that they would be voting to evict either Allison or Ryan from the house, rather than the both of them being evicted. Allison then became the first individual HouseGuest to be evicted from the house in a unanimous vote of six to zero. Following Allison's eviction, HouseGuests competed in the "Time After Time" Head of Household competition. For this competition, HouseGuests were asked true or false questions as to whether one event occurred before or after another event. Ryan was the winner. Shortly afterwards, Adam, James, Matt, and Ryan formed an alliance, and chose to target Sharon that week. On Day 29, HouseGuests competed in the "A Little 'Fon Will 'Due' Ya!" food competition. For this competition, HouseGuests were separated into two teams, and were required to get into two pools of chocolate one at a time and spell out words with the letters inside. The team with the most correctly spelled words would win the competition, but would only win the food items they had spelled. The team of Chelsia, Joshuah, Sharon, and Sheila were the losers, thus were put on the slop diet for the week. That same day, Ryan chose to nominate Sharon and Chelsia for eviction. Following this, Chelsia, James, Joshuah, Sharon, and Sheila devised a plan to get Ryan to backdoor Matt that week, and they told Natalie in hopes of getting her to agree with the plan. Despite initially agreeing, she later informed Matt of this plan. When picking players for the Power of Veto competition, Adam, Sheila, and Joshuah were selected to