In the first ever 2-hour season finale, one houseguest is crowned the winner and awarded $500,000, and all the houseguests are reunited for the first time. Also, Julie reveals which houseguest America chose as their favorite and awards the lucky juror $25,000.

12 strangers will move into the Big Brother house and learn that they will be 'kickin it old school' this summer, high school to be exact. The House Guests will be shocked to learn that they will be playing the game in one of four familiar high school cliques - popular, athletes, brainiacs and off beats.

Chima's actions lead her to an untimely eviction. After a new HoH competition to reset the game, a few houseguests have a difficult time accepting the new power shift.

The power of veto competition is a gamble and the alliances campaign in their best interest. Chima upsets Russell and Michele proves to be the swing vote.

Chima, Lydia and Natalie mourn Jessie's eviction, while Michele puts up her two nominees. Also, the houseguests compete in this week's have/have not competition.

Russell pushes Jordan to her limit, and the houseguests decide whether to send him or Natalie to the jury house. Also, the HoH competition may be chocolatey, but it's anything but sweet.

Lydia causes a ruckus, while Russell does all he can to make sure Braden goes home. Who will be evicted from the Big Brother house? Also, the houseguests compete to win HoH by predicting how fans voted in an online poll.

Showmances begin to blossom and another houseguest goes home in a heated eviction. Also, the houseguests face off in their first endurance HoH competition.

The power of veto competition is a gamble and the alliances campaign in their best interest. Chima upsets Russell and Michele proves to be the swing vote.

Russell and Chima have a throwdown and another houseguest is eliminated. Also, the winner of the coup d'etat is revealed and the houseguests compete for HoH based on America's advice.

In the fast-paced hour, the houseguests compete for veto, evict another houseguest and battle it out for HoH, all live. Also, secrets about Jessie's actions when he was in the house turn some of his strongest supporters against him.

A new HoH is crowned and with Lydia's eviction, the houseguests start to reconsider their alliances. Russell wants to secure his place in the final four but his ego makes the others want him out.

A past houseguest helps out in the crucial PoV competition. As the house pairs up, Jeff may have to watch his back.

The future of the remaining houseguests rests in the next PoV competition. The unthinkable may happen and long-standing alliances may be broken up.

The mood in the house quickly turns sour as the houseguests compete for the first power of veto. Lydia tries to ally herself with the athletes and Ronnie walks a fine line.

Ronnie's lies catch up to him and a second houseguest is evicted from the Big Brother house. Plus, a new HoH is crowned.

Russell and Chima continue to fight and one of the houseguests has to make a difficult decision. The PoV competition is more important than ever as the girls side with each other.

Russell shows his volatile side before the power of veto competition. Jeff and Laura desperately need to stay in the house.

After winning HoH, Kevin is faced with a difficult decision. Natalie guns for Michele to be evicted.

The houseguests compete in part two of the final HoH competition, while Julie reveals some of the final twists of the season. Also, four of the best houseguests from Big Brother history return to weigh in on this season's final three.

As the HoH, Ronnie strategically decides which houseguests must fight for the power of veto. The houseguests compete for the chance to watch a screeing of The Ugly Truth.

Ronnie tries to make nice in order to save himself from being put up for elimination. Surprising romances develops in the house.

Russell and Jeff come to an agreement about who should get HoH. Russell proves to be a man of his word as he announces his nominations for eviction.

Russell tries his best to make nice with Chima after she wins HoH. In a luxury challenge the houseguests are split into two teams and given the chance to win great prizes.

Jessie from Season 10, the current HoH returns and the other houseguests do all they can to avoid a nomination. The stakes are raised when cliques are punished for losing the food competition.