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

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

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

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 two teams are each given a "Jet Stream" trailer to transform into a mobile campaign to promote and sell Kodak products. The pressure builds when Hydra damages their computer and Empresario misses out on a meeting with the executives.

The remaining celebrity contestants must create awareness for a footwear company's shoe-donation campaign. One celeb steps up the drama by defecting to the other team. But is that defector actually serving as a spy? Ivanka Trump and Donald Trump Jr. are the project overseers.

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.

The star contestants are charged with writing, producing and starring in a live cooking demonstration for Omaha Streaks. One group elects a vegetarian to lead the meat, while the other team selects a loose cannon to lead the charge.

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 series returns with 16 new stars! Watch these celebrities battle in men vs. women teams, tackling business challenges that test their skills and creativity. First up: a pie selling challenge where it is winner-take-all. Who will be sent home?

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.

The celebrity teams battle to create the perfect display for Ivanka Trump's shoes! Kenya Moore and Vivica A. Fox lead their teams in this stylish marketing challenge, with Joan Rivers helping judge. Who'll step up and who'll get stepped on?

The teams create a viral video to promote the Chock Full o'Nuts new single serve coffee cups. Two teammates have an all-out cat fight on the streets of New York City, and in the Boardroom, the tension mounts until Trump sends another star packing.

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.

Donald Trump returns for an eighth season in the boardroom. Joining him are fourteen new celebrity candidates vying for the title of the Celebrity Apprentice, as well as $250,000 for the charity of their choice. First up, a bake sale featuring cupcakes in a challenge to sell the most, despite culinary challenges and a surprise taste test.

Each team is given two Camping World RVs to stage an 'experience' in mid-town Manhattan. One Celebrity wrestles control away from their project manager. The other team questions the sanity of their leader, who stops working on the task to play a game of catch. It's a race to the finish, but one team ultimately stands victorious. The losing team faces Donald Trump in the boardroom where another Celebrity is fired.

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 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.