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In the semi-finals the comedians perform on stage before an audience and even more judges. But, before the show-down, the comics had a party on the bus from the airport to the hotel. At the theater, they were divided into two groups of twenty. Ten from each group moved on.

The twenty finalists go to Las Vegas and are surprised to find out that they have to room with one of the other contestants. The first group of ten perform. Five are chosen to move on and live in the house.

The next ten perform. But first, Executive Producer Peter Engel breaks the news to Jim Norton that he would be eliminated from the competition because of his prior commitments. They then call the alternate choice, Jim Wiggins, and fly him to Las Vegas. The final five are named – but not without controversy. Brett Butler walks out, and Drew Carey is also upset – because they thought that those chosen are only as a result of the votes by the four judges. Peter Engel had to explain that there were also four other judges in executive positions.

They find out that their house looks like a haunted castle. Then they're paired up with a roommate. Their first task: performing at a Laundromat, not knowing that a talent scout is among them. She chooses the best performer to perform at Aspen. John Heffron and Bonnie McFarlane go head to head. 94% of the audience vote for John.

A yoga instructor lead some group meditation. This week's challenge: The comics work as tour guides on a Hollywood tour bus. Two would compete, each taking a turn giving a tour as the bus drove through the city. Then the tourists on the bus would vote. The loser would be dismissed while the winner would stay to face the next comic, until only one was left standing. Ant wins and is Immune from elimination for this week. The comics voted. When the votes were tallied, it was a tie between Tammy and Todd (3 to 3). They would then face each other in the head-to-head. 55% of the audience voted for Tammy.

This week's challenge was to roast a housemate at a Friars Club, with celebrity guest judges Norm Crosby, Phylis Diller, and Rich Little. The comics all ended up roasting Jay London. The judges picked Alonzo as the funniest roaster, meaning he received a free one year membership to the club, and Jay won immunity. When the voting was finished, Gary had the most votes. He went up against Ant, and Gary won with 73% of the audience vote.

A dog becomes part of the household. A very surprising challenge – "their toughest challenge yet". After some speculation, a clown comes out followed by a bunch of excited kids. Each comic chooses a costume to wear and a name for their character. After performing, the kids place a sticker on the comic that they thought was funniest. The winner gets exemption and a 4-course meal at an expensive restaurant. In the voting for the head-to-head, Gary and Jay both get 2 votes. They pack their bags and get ready to compete.

Jay Mohr arrives at the house to announce a surprise - those that were previously eliminated come back. Each eliminated comic would get a vote to help determine the head-to-head match up for the remaining six comics. For the final challenge, each comic would have to pitch a sitcom with himself or herself as the star. The videotaped pitches would be shown to a focus group, who would evaluate the show. The comic with the highest-rated pitch would win immunity and a guaranteed spot in the final five. Tammy wins. In the voting, John gets the most votes. He chooses Corey. Then in another twist, they vote for a three-way head-to-head. Alonzo is chosen.

The five ousted comics get another shot. They all perform live for the chance to get back into the game. America votes.

The eliminated comics perform again. The results are given, and the wild-card winner is revealed before a live television and theater audience.

The Final Six square off in another live performance.

After some stand-up routines, the results are revealed - and it's the end of the line for three of the Final Six.

Reviewing the past season, including never-before-seen clips. The final three battle it out in the ultimate showdown. Only one will be left standing.

Before the results of America's voting are revealed, Dat Phan and Ralphie May, from season 2, perform. Then the 3 finalists perform one last time… To see the results click on the recap.