This week's Head of Household, Alison Irwin, a retail sales manager from Pittsburgh, nominated Dana Varela and Jun Song for eviction in the fourth round of "Big Brother 4" nominations on the episode that was broadcast Friday, August 1 on the CBS Television Network.

Dana, 28, is a karate school manager from Queens, N.Y. and Jun. 27, is an investment manager from New York.

Dana and Jun will learn their fate live on the Wednesday, August 6 (9:00-10:00 PM, live ET/delayed PT) edition of "Big Brother 4," unless one is spared by the winner of the Power of Veto challenge on Tuesday, August 5 (8:00-9:00 PM, ET/PT). If the winner of the Power of Veto chooses to remove Dana or Jun, the Head of Household, Alison, must immediately choose a new nominee.

Immediately following the voting results on August 6, the evicted Houseguest will exit the house, proceed to the live show studio, be reunited with his or her family and talk with host Julie Chen.