09.02.04 HoH: CHEMICAL REACTION
Before the HouseGuests can digest what's gone down, they are on to the Head of Household Competition, Chemical Reaction. The remaining HouseGuests, save outgoing HoH Marvin, stand atop a set of stairs. Before them are two flasks and a beaker all filled with fluid. Julie ask a question, and then each HouseGuest chooses either a TRUE or FALSE flask to pour into the beaker. If the liquid in the beaker turns blue, they have answered correctly. If the beaker's liquid is clear, they are out of the game. The HouseGuests are asked a series of questions about previous Competitions and the circumstances surrounding them. Drew emerges victorious, winning HoH for the second time.

8-31-04 POWER OF VETO: ICE, ICE VETO
The Power of Veto is encased in a block of solid ice and the HouseGuests have only a super-soaker gun to free it. Each HouseGuest must train their water gun on the block of ice to create an opening that will free the Veto. Once they have the Veto in hand, they must run and hit a buzzer. Of course, there is a twist: there is also a red 'T' that if freed gives the HouseGuest access to a toolbox that might help them get to the PoV that much faster.

Although Adria gives her a run for her money, Karen wins her first competition and chooses not to exercise her PoV.