The fourth-season opener adds some new twists as the third season's couple, Nate and Jennylee, join host Mike Richards to conduct a nationwide search for the contestants. The chosen 20 meet in the mansion and realize that they have to compete against their opposite - a geek gal and a hot guy. The housemates then pick their partners during a barbecue.

In part two of the fourth season premiere, the twenty chosen contestants soon realize that they are in for a very unique season as the new cast includes a male beauty and a female geek. Afterwards, the finalists pair up during a barbecue and get to meet their new partners.

The male beauty and female geek move into the mansion as the beauties and geeks study for their first challenge. The geeks must write and perform an autobiographical rap song for 3/6 Mafia while the beauties must study up on politics for a political debate about current events. After the winners are announced, one team is eliminated.

After a champagne celebration and a game of Truth or Dare take place, a romance begins to happen in the house between two contestants. Meanwhile, the beauties must study anatomy, and are later challenged by locating and drawing organs on their partner's body. The geeks, on the other hand, are challenged to put together romantic gifts.

The beauties and geeks work out a plot to dethrone "King Geek", while the romance between two houseguests threatens one team. After America votes which challenge the contestants will compete in, the geeks must give a massage to their partner while the beauties build rockets.

It's makeover time! The geeks get their new looks and later put them to the test in the Beauty and the Geek prom, where one of them is named king. Meanwhile, the beauties are required to teach a third-grade class.

The geeks must create superheroes and design their own costumes. The beauties, meanwhile, are required to provide the back story for their partner's super creation.

With only five weeks until the season finale, the show is taking viewers back to the special moments of season four and also treating its audience to never-before-seen footage of the contestants.

The remaining contestants travel to Mexico, where one geek comes out of his shell and another is pushed to limits. For their challenges, the beauties must face each other in a memory competition while the geeks compete for immunity in a dance-off. Finally, a new twist promises to turn the competition upside down.

It's down to the final four teams, and tension and second guessing begin to take over the mansion. For their challenges, the beauties must get personal with creepy crawlers and the geeks must battle it off at a bar tending challenge that will test their confidence.

The three remaining contestants are off to a wine making contest at a local vineyard.

The final two teams go to each other's hometowns and meet each other's parents. Later, the contestants are shocked to discover that a major twist has the final showdown be something completely unexpected.

In the fourth season finale, all ten teams are reunited for one last time. At the end of the encounter, the winning team is revealed.