ENTER NATALIE, ENTER CHAOS

After letting Scott know about the existence of the twins, Julie begins to lay the groundwork for Natalie's entry. She asks Diane how many HouseGuests have been competing since day one. When Diane replies that there have been 13, Julie reveals that there have, in fact, been 14. She reminds the HouseGuests that this was Project Do Not Assume and that in fact, one of the housemates has been switching in and out of the House with a twin since day one.

Stunned, most of the HouseGuests look like they have seen a ghost, and first looks are shot at Drew and Diane. Cowboy keeps asserting, "It's Holly. It's Holly." Will is trying to fathom who it might be, and Cowboy just keeps repeating "It's Holly." For a moment, Jase says, "Scott has a twin." Then the moment that so many people have been waiting for arrives, not before Jase says, "I hope it's Holly." Natalie walks in the door, and chaos ensues: there is hugging, there is screaming. Jase looks like he can't catch his breath. Will exclaims, "I knew it!" But there isn't much time for it to sink in as Natalie and her housemates go outside to play "Home is Where the Answer Is."

THE WOMEN HAVE IT: NAKOMIS WINS HoH

The HouseGuests head to the backyard and engage in a little bit of True or False, all based on different artifacts in the house. Julie asks a question about the BIG BROTHER House, and each HouseGuest toggles a True/False switch to answer. After two rounds, most of the boys have been eliminated, making the competition essentially moot, as the girls' alliance will definitely have the knives out for Jase. And then it happens: Nakomis wins and becomes the second consecutive female HoH.

After the competition, visit the HouseGuests one last time as Natalie further introduces herself, and Julie asks the HouseGuests what they think. Will says, "I almost caught it. I did notice Adria's birthmark." Karen jokes, "I'm getting all the action. I'm sleeping with both of them."

How will the HouseGuests react to Natalie and Adria being in the House together? Will Jase survive without Scott? Are the Four Horsemen cooked? Will Nakomis spare her brother, or will the game dictate her actions? Find out Saturday at 9PM ET/PT on BIG BROTHER 5.