With Arnold Schwarzenegger as the new boss, the celebrities get right down to business with tasks from Tyra Beauty and Trident gum.

The celebrity teams delve into two tasks. In the first, they must design and sell a New York City guidebook, with Regis Philbin on hand to appraise the books. Then, they create an interactive health segment, but the task comes with a twist.

Season 12 of Donald Trump's business-savvy series opens with 18 celebrity players creating and selling deli sandwiches. The star contestants include Arsenio Hall, Clay Aiken, Cheryl Tiegs, Debbie Gibson, Adam Carolla, Lisa Lampanelli and Penn Jillette.

The teams produce and perform a medieval-theme show for an audience, yet an insubordinate contestant and a serious injury mar the task.

The players have to produce themed living Lord and Taylor display windows featuring Ivanka trumps fashion line. The boys don't quite get women's fashion like the girls do.

The star players rev up to produce a live event spotlighting a new Buick vehicle, but one team is in danger of stalling out when the choice for project manager is questioned. Meanwhile, a deep division develops in the other team

The celebrity players are assigned to write and produce a viral video promoting a mop. It's risqué business when one team hatches a lusty concept. Meanwhile, serious divisions mar the other team.

The celebrities must host a launch party for a "mocktail" drink product. One team sets sail with a beach theme while the other produces an exotic Garden of Eden experience.

Fallout from a previous boardroom session results in one celebrity launching an emotional tirade and another one going missing. As for the challenge, the players must write, direct and produce a 60-second commercial for an entertainment Web site.

The remaining celebrities create original puppets for Henson's "Stuffed and Unstrung."

The celebrities must fashion an in-store display and create a slogan for a new fragrance. Business snafus unfold when two project managers spar and one team frets about an indecisive leader.

The stars must write and perform a 90-second jingle for a roadside-assistance program. But the task lacks harmony when mutinies and internal power plays mar both teams.

The remaining contestants produce a four-page print ad for a digital touch-screen hair dryer. Returning apprentices John Rich and Marlee Matlin then interview the final four celebrities, after which Donald Trump selects the final two players.

The final two contestants are tasked to create, host and sell tickets to a celebrity charity event that comes complete with a variety show and a charity-awareness ad. Eight previously eliminated stars return to help in the challenge.

The two finalists must successfully stage their celebrity charity event, after which the winning contestant is revealed.

Season 13 opens with 14 returning celebrities tasked to sell meatballs in a charity competition, but there are beefs due to a power struggle and an unorthodox approach to the mission. Stars include Trace Adkins, Stephen Baldwin and Gary Busey.

The teams jet to Universal Orlando Resort in Florida to produce an interactive 3-D photo experience, but an indecisive project manager and a tyrannical leader mar the mission.

The all-star celebrities must perform a soap-opera scene for a beverage-mix product. One team doesn't mix well, however, when a project manager tangles with an insubordinate member.

The celebrities must use a glass truck to promote a hair-care and spa-products company in a mission that challenges marketing skills. One team lacks harmony thanks to a troublemaker while another star is labeled a weak player.

The celebrities are tasked with creating original, three-dimensional artwork. But winning the task comes down to fundraising, and one contestant struggles with bringing in enough money to keep the team safe in the Boardroom. Meanwhile, the other team's Project Manager has to deal with a teammate who over-promises and under-delivers.

The 16 celebrities are divided into two teams and tasked with running pizzerias; the teams set a fundraising record; the first contestant is eliminated.

The contestants are split into two teams, one team of 8 men and another team of 8 women. The two teams are then given their first challenge - sell lemonade on the streets of New York with a budget of $250. The team that makes the most profit wins.

In the second episode of the season, the Celebrities must write an original children’s book based on one of their own teammates and perform it for 4- and 5-year-olds.

The remaining celebrity players create original artwork and sell the pieces for charity, but a misunderstanding, a fiery confrontation and nasty traffic test the teams and jeopardize the task.

In this fiery episode, the celebrity teams create a fitness advertorial for Cosmo Body Magazine. Two members of the men's team solidify their seething rivalry, while the women fight over who should be the fitness model for their photo shoot.